Partners. 0000005200 00000 n PDF | On Jan 1, 2016, Asha Gupta published WATER POLLUTION-SOURCES,EFFECTS AND CONTROL | Find, read and cite all the research you need on ResearchGate El objetivo de este trabajo ha. RESEARCH PAPER • Getting ready with data • First draft • Structure of a scientific paper • Selecting a journal • Submission • Revision and galley proof Disclaimer: The suggestions and remarks in this presentation are based on personal research experience. Conference on Water and the Environment which was held in January 1992 in Dublin, Ireland. Reviving traditional tanks to control floods in Chennai A study finds that desilting and reviving traditional tanks in Chennai can greatly help in mitigating the impacts of frequent floods in the city. Fertilizers, pesticides, herbicides and insecticides cause water acidity, especially in ecosystems such as the Colombian Oriental plains characteristic of their acidic soils and waters, diminishing their productivity and generating a toxic effect for plants. 0000005161 00000 n Copy URL. Activation time and sperm motility did not showed significant differences for each species analyzed with different sampling sources of water, presumably because this study was carried out in the high water season and their large volumes of water can dilute contaminating agents that could have an influence on reproductive cells. Se midieron sus propiedades viscoelásticas (G’ y G’’), y se llevó a cabo una evaluación sensorial mediante un panel formado por 7 catadores entrenados en 6 atributos sensoriales. First it defines the right and identifies some of the challenges of research in the field. Water is a limited resource. Storage of nitrogen in groundwater, although of importance in some localities, is a very small sink for nitrogen inputs in all regions. We hire top-rated Ph.D. and Master’s writers only to provide students with professional research proposal help at affordable rates. The only type t hat has so far been made is the Water Sharing Plan. More than 19.5 million inhabitants live in Dhaka, and the population growth rate of urban areas in Bangladesh is almost double that of rural areas. Anthropogenic sources of contaminants are co, fertilization is the main source of N in streams and rivers (Goo, nutrients that are relatively easy to monitor and regulate, nonpoint sources such as livestock, crop, sources are now the major source of water pollution in, large amount of heat to the water bodies leading to change in the physi. El presente documento propone una metodología para la reducción y control sistemático de las pérdidas operativas y comerciales de agua aplicada en un sector piloto, en la ciudad de Huaraz (Departamento de Ancash), con la participación colegiada entre la Gerencia Operacional y Gerencia Comercial de la Entidad Prestadora de Servicios de Saneamiento Chavín S.A. El informe expone la base técnica, La tecnología de secado combinado aire caliente-microondas (AC+MW) puede reducir el tiempo de proceso y los costes de evaporación asociados a los procesos de obtención de fibra a partir de subproductos cítricos, resultando en un ingrediente rico en fibra dietética con propiedades tecnológicas y sensoriales adecuadas para su aplicación en la industria alimentaria. 0000005268 00000 n The presence of natural or non-natural pollutants in water resulting from human activity such as the introduction of harmful agricultural and industrial pollutants into rivers that could be the main reason in forming trihalomethane compounds after chlorination step in drinking water production plants. 3(5), 26-31, May (2014) Res. Efficient Energy Consumption and Economic Growth (Pdf… Mercury was at the highest concentration in Ocoa River and iron was higher in Meta and Upía river. transfer project of China. The Productivity Commission The Productivity Commission is the Australian Government’s independent research and advisory body on a range of economic, social and environmental issues affecting the welfare of Australians. 0000005404 00000 n In this study, cluster analysis, discriminant analysis, and factor analysis techniques are applied to analyze the physical The purpose of this study was to evaluate the geological and anthropogenic aspects of As pollution in surface and groundwater resources of Jamshoro Sindh, Pakistan. Figure (2) represents the analysis from GC/MS in January and the compounds produce from chromatogram were recorded in table. area has had limited research conducted about its water quality, including by regulatory bodies charged with the control of the water quality. Liquid organic effluents change t, synergistic, additive or antagonistic interactions between metals with respect to, Siltation inhibits the growth of aquatic plants. Continuing Education Courses: Field Training & Workshops in Earth Science. The most consistent and pervasive effect is an increase in impervious surface cover within urban catchments, which alters the hydrology and geomorphology of streams. : Water Res. Each customer will get a non-plagiarized paper … every year due to diarrhoeal diseases (Steiner and Gurrant, 2006). Sample size 18 Bias 18 Confounding 18 Applicability 19 Consistency 19 The GRADE approach to assess the evidence on dental and other human health outcomes and reach a conclusion about the intervention of water fluoridation 19 Assessing the quality of the evidence by outcome 20 Developing Evidence Statements … The current (1980–99) average nitrate flux to the Gulf is almost three times larger than it was during 1955–70. Access scientific knowledge from anywhere. construction, agricultural practices, recreational and tourism , sand mining, quarr. habitation from where further water is drawn for use. Urban streams represent opportunities for ecologists interested in studying disturbance and contributing to more effective landscape management. Open PDF in Browser. The traditional drinking water treatment plant considers unstable plant for the removal of organic compounds in the winter and spring with the possibility of forming chlorinated organic compounds. Markéta Knížková Executive Editor phone: + 420 227 010 373 e-mail: swr@cazv.cz. Water Research has an open access mirror journal, Water Research X. These changes result in consistent declines in the richness of algal, invertebrate, and fish communities in urban streams. In aquatic ecosystems, these nutrients cause diverse problems such as toxic algal blooms, loss of oxygen, fish kills, loss of biodiversity (including species important for commerce and recreation), loss of aquatic plant beds and coral reefs, and other problems. This study employed the contingent valuation method (CVM) to estimate WTP of the respondents. Private Water Wells, Rural Water Wells, Springs This is a reference library that has been compiled on a number of topics ranging from water quality, household drinking water, water treatment, evapotranspiration, groundwater, lake management, mold, private well water … A REVIEW ON WATER ELECTROLYSIS Emmanuel Zoulias1, Elli Varkaraki1, Nicolaos Lymberopoulos1, Christodoulos N. Christodoulou2 and George N. Karagiorgis2 1 Centre for Renewable Energy Sources (CRES), Pikermi, Greece 2 Frederick Research Center (FRC), Nicosia, Cyprus Abstract. Diarrhoeal disease alone amounts to an estimated 4.1 % of the total Disability-Adjusted Life Years (DALY) global burden of disease and is responsible for the deaths of 1.8 million people every year [1]. Search our database Download E-Tools See the latest issue of our journal, Water SA See the latest Water … TITLE: A SAMPLE RESEARCH PAPER ON ASPECTS OF ELEMENTARY LINEAR ALGEBRA MAJOR PROFESSOR: Dr. J. Jones (Begin the abstract here, typewritten and double-spaced. The city of Dhaka has been ranked repeatedly as the most polluted, the most populous, and the most unbearable city in the world. These chemicals may reach human through food chain leading to biomagnification. To address these complex issues, EPA is conducting research … Centre of Advance Study in Life Sciences, Department of Life Sciences, Manipur University, ). Home > Research > Global reports > Global Water Report 2018. International Journal of Scientific and Research Publications, Volume 7, Issue 8, August 2017 269 ISSN 2250-3153 www.ijsrp.org Water Pollution: Causes, Consequences, Prevention Method and Role of WBPHED with Special Reference from Murshidabad District Rozina Khatun Research Scholar, Department of Geography, Tilka Manjhi Bhagalpur University, Bihar, India . (a) A RESEARCH PAPER is a contribution describing original research, including theoretical exposition, extensive data and in-depth critical evaluation, and is peer … Values of contaminants in dry-season were obviously higher than those in wet-season. J ... characteristics of ground water and Water quality index (W.Q.I.). Because of their rich habitats and because they are so easily accessed, bays … community should play a regulatory role. A page and one-half is approximately 350 words.) Arsenic concentrations in surface and underground water range from 3.0 to 50.0, and 13 to 106 microg l(-1), respectively. They establish environmental water rules, identify water requirements for all A thesis abstract should consist of 350 words or less including the heading. Arsenic contamination in water has caused severe health problems around the world. See the definitions of the different paper types. One of pollution parameter that caused by organic pollutant was Chemical Oxygen Demand (COD). The results revealed that 67% of the respondents are willing to pay for an improved water pollution management system, while 31.8% of households are unwilling to pay. Drinking Water Research Papers Drinking Water Research … This zone of oxygen-depleted water has doubled in areal extent since it was first measured in 1985. Agricultural sources of nitrogen dominate inputs in many regions, particularly the Mississippi basin and the North Sea drainages. The first goal of the research paper is to explain ideas, goals, and theory as clear as water. Due to spatial and temporal variability in precipitation the country faces the problem of flood and drought syndrome. Abstract: Flooding is an accumulation of water in an area either by direct rainfall irresistible to the volume of drainage systems or a spill of huge amount of water from water bodies beyond normal limits. Drinking water and the environmental impact research paper topic from Paper Masters. Nowadays research and development into high efficiency electrolysers is flourishing in many areas. Therefore, there was the need to use additional treatment techniques to meet the challenges of new pollutants. ȱ�d_�.���pI@�,�#�(���+H0��#����,�[���tMUAݷX/�K���������*=� ���C�N�B�E and fresh water supplies (CPCB Report, 2013). We would like to express our sincere thanks to Kenneth Donaldson, Chair of the Resource … 0000004648 00000 n Download PDF Article HTML. farming practices should be encouragde for judicious use of water. RESEARCH PAPER • Getting ready with data • First draft • Structure of a scientific paper • Selecting a journal • Submission • Revision and galley proof Disclaimer: The suggestions and remarks in this presentation are based on personal research experience. In most of the water samples As levels exceeded the WHO provisional guideline values 10 microg l(-1). mining etc. The White Paper is aimed principally at high level policy-makers, to promote and encourage policy support and investment for water accounting. (China) using multivariate statistical techniques. Join ResearchGate to find the people and research you need to help your work. Next, it delineates international standards and … Considerable investments, This has resulted in pollution of the surface and groundwater, also drawn for irrigation and domestic purpo, practices such as sprinkler and drip irrigation. It may be concluded that As originate from coal combustion at brick factories and power generation plants, and it was mobilized promotionally by the alkaline nature of the understudy groundwater samples. WWAP) as a partner initiative of the World Water Council (WWC). 2 INTEGRATED URBAN WATER MANAGEMENT . Career Training and Online Learning . ... QP2010Ultra). startxref Cluster analysis classifies 12 sampling sites with 22 variables into three clusters reflecting Contact. The predominant source areas for the nitrogen transported to the Gulf of Mexico are basins draining southern Minnesota, Iowa, Illinois, Indiana, and Ohio. Therefore, the objective of this paper was to assess the efficiency of traditional drinking water treatment plants in the removal of organic and inorganic pollutants (chemical and physical parameters). (a) A RESEARCH PAPER is a contribution describing original research, including … %%EOF To characterize the surface water … A biomass packed bed was prepared for the study with a packing factor of 0.0617 and 0.0550 for the modified and unmodified fibers respectively. 1/25th of world’s water resources (Water Management Forum, development activities particularly in relation to, extensive urbanization, agricultural practices, industrialization, and population expansion, reprocessing plants to nearby countries. 0000049927 00000 n The networ. It also highlights integration of the blue and green flows and concepts of virtual water transfer for sustainable management of the wa-ter resources for meeting the demands of the present, without compromising the needs of future generations. DEDICATION (NO REQUIRED FOR RESEARCH PAPER… This paper examines the policy and implementation frameworks currently governing the urban water sector to identify where there may be impediments to the adoption of IWCM. 0000042022 00000 n 0 Aquatic Resources, Series: MINARS/35/2013-14. Deposition of oxidized nitrogen, primarily of industrial origin, is the major control over river nitrogen export in some regions such as the northeastern U.S. Research Opportunities; RDI Annual Call for Proposals; SCM. The multivariate technique (cluster analysis) was used for the elucidation of high, medium and low As contaminated areas. Measured parameters were the pH, colour, total dissolved solids (TDS), total suspended solids (TSS), dissolved oxygen (DO), chemical oxygen demand (COD) and biochemical oxygen demand (BOD). River pollution can cause coastal pollution due to many pollutants can not remove during water flow from upstream to downstream. Add Paper to My Library . The total nitrogen flux from the Amazon is also large, contributing 3.3 Tg yr-1 out of a total for the entire North Atlantic region of 13.1 Tg yr-1. In addition, pollution sources need to be and a map created to illusidentified trate the contaminated sites. It then goes on to explain the research and effectiveness of Best Management Practices (BMPs) and their positive … are great in macrophytic plants due to their low solubility in, plants. Your research paper proposal will be written from scratch. Submit Paper. See all articles by Jootaek Lee … The rainfall in India shows very high spatial and temporal variability and paradox of the situation is that Mousinram near Cherrapunji, which receives the highest rainfall in the world, also suffers from a short-age of water during the non-rainy season, almost every year. 0000026231 00000 n 2. Over-exploitation of groundwater is leading to reduction of low flows in the rivers, declining of the groundwater resources, and salt water intrusion in aquifers of the coastal areas. 0000000016 00000 n bicarbonate, and potassium. This results in predictable changes in stream habitat. The highest counts were consistently found in the sample BW where the borehole was located in an unsanitary environment near septic tank. 0000057867 00000 n Performance Evaluation of Drinking Water Treatment Plant in Iraq, Influence of water from apparently contaminated sources, upon activation time and sperm motility of native fish species from Colombian Orinoquia, Evaluation of Luffa Cylindrica Fibers in A Biomass Packed Bed for The Treatment of Paint Industry Effluent Before Environmental Release, Pollution of Water Sources from Agricultural and Industrial Effluents: Special Attention to NO 3 ˉ, Cr(VI), and Cu(II), Removal of Chemical Oxygen Demand in Brackish Water by Rhizophora mucronata using Reed Bed System Batch Reactor, A contingent valuation approach to evaluating willingness to pay for an improved water pollution management system in Dhaka City, Bangladesh, Regional Nitrogen Budgets and Riverine N & P Fluxes for the Drainages to the North Atlantic Ocean: Natural and Human Influences, Water quality assessment of the Jinshui River (China) using multivariate statistical techniques, Non-Point Pollution of Surface Waters With Phosphorus and Nitrogen, Long-Term Changes in Concentrations and Flux of Nitrogen in the Mississippi River Basin, USA, Bacteriological Quality of Borehole Water Used by Students’ of University for Development Studies, Navrongo Campus in Upper-East Region of Ghana, Spatial and seasonal variations of the contamination within water body of the Grand Canal, China, Evaluation of arsenic and other physico-chemical parameters of surface and ground water of Jamshoro, Pakistan, Carbon stock assessment from Bamboo forests and plantations of Manipur, Ongoing Assessment of Carbon stock and sequestration potential of major Landuse systems in Manipur funded by DST, GOI, Determinación y reducción del agua no facturada en sector piloto - Huaraz. In either case, projected increases in fertilizer use and atmospheric deposition in the coming decades are likely to cause dramatic increases in nitrogen loading to many tropical river systems. Just visit our website and fill in the order form with all proposal details: As with all other elements of emergency management, water supplies can be designed and main-tained in ways that help to reduce the health impacts of disasters. It is useful to distinguish between large-scale, formal water-supply systems (e.g. Parameter of COD was determined using digestion reactor and spectrophotometer. 3, page 388 ... Paper type (e.g., research paper, issue paper). The aim of this study was to investigate the potential of Luffa Cylindrica fibers in a biomass packed bed for the treatment of paint industry effluent before releasing into the environment. Although understudied in urban streams, ecosystem processes are also affected by urbanization. The paper presents availability and demands of water resources in India as well as describes the various issues and strategies for developing a holistic approach for sustainable development and management of the water resources of the country. Published in 2001 by John Wiley & Sons, Ltd. Water resources of a country constitute one of its vital assets. Each customer will get a non-plagiarized paper with timely delivery. Centre for Biodiversity, Department of Botany. Address. Atmospheric deposition further contributes as a source of N. These nonpoint inputs of nutrients are difficult to measure and regulate because they derive from activities dispersed over wide areas of land and are variable in time due to effects of weather. fresh water is usually below 1mg/l while that of organic matter polluted water is more than. Each year more than 3,000 scientific publications are revised which requires about 7,500 peer reviews per year. An appropriate citation for this paper is: Productivity Commission 2010, Market Mechanisms for Recovering Water in the Murray-Darling Basin, Final Report, March. In many river basins, lack of progress towards sustainable development can be traced to constraints imposed by limited availability and access to water. Abstract- Water … This will have impacts o, snowline, reducing the capacity of these natur. Diarrhoeal disease alone amounts to an estimated 4.1 % of the total Disability-Adjusted Life Years (DALY) global burden of disease and is responsible for the deaths of 1.8 million people every year [1]. Urban Northeastern University School of Law Research Paper No. The findings show that the water samples except those from SSNIT hall did not meet the WHO for drinking and domestic water and should be treated or boiled and filtered before drinking. 0000052006 00000 n the water surface forming a thin layer of water-. The high level of As in under study area may be due to widespread water logging from Indus river irrigation system which causes high saturation of salts in this semi-arid region and lead to enrichment of As in shallow groundwater. 1. determinación de la zona de estudio, descripción de las tareas que se realizar, recursos a utilizar. *Microwave Research Laboratory, Z. Energy Options for Uttara Kannada Prospects of Wind Energy (Pdf) 75. x��[ytE�Lf����@I�#"(0A1f$�(A��`P�� This research document was the result of a project of Learning and Communication of Water supply, Sanitation and Hygiene (WaSH) of Amhara region which was financed by Water Aid Ethiopia. A great research paper topic is "the importance of drinking water" and how this is becoming a more precious commodity. 1-212. nitrogen in the Mississippi River Basin, U.S.A. http://environment.about.com/od/environmentalevents/. include fertilizers, pesticides which may be herbicides and insecticides widely used. The samples withdrawn during April were extracted by hexane -diethyl ether and analyzed by GC-MS as in figures (3, ... Phosphorus is the second most important nutrient in the eutrophication processes of aquatic ecosystems that occur in urban as well as in agricultural production areas. Theoretically, good research paper examples will meet the objectives of the research. Using the URL or DOI link below will ensure access to this page indefinitely. Opt. A way of improving electrolysis units efficiency is by increasing the process temperature which lowers the voltage required to electrolyse the water, but also requires more expensive materials. From the themed collection: Environmental Science: Water Research & Technology Recent Review Articles. Over canal-irrigation in some of the com-mand areas has resulted in waterlogging and salinity. We depend upon it for our livelihoods, healthy ecosystems, and a robust economy. The traditional plant show the removal efficiency of organic materials was 82% in the winter and 52% was in the spring season. Drier regions are associated with higher water … Water Sharing Plans apply to a specific water management area. It could be localized, impacting a small area or could be vast or massive, impacting very large area. Understanding variables that determine residential water demand and water source decisions helps the water supply utilities, local and regional governments Information; Tenders; RFQ’s; Archive; Blue Directory. Effect of water pollution on human health, With rapid industrialization and urbanizat, There should be ban on washing of clothes and laundry. Concentration of cyanide and lead was high in all sampling sites. The results showed that the physical and chemical properties were not significantly affected during the treatment process and their values were within the limits of the standard of drinking water. Plan de acciones, Entidad Prestadora de Servicios de Saneamiento Chavín S.A. Current trends of research and development on water systems instrumentation and control. Discriminant analysis confirms the three clusters with nine discriminant variables Water Research has an open access mirror journal, Water Research X. 0000050805 00000 n Hydride generator atomic absorption spectrophotometry (HG-AAS) is employed for the determination of arsenic in water samples, with detection limit of 0.02 microg l(-1). 0000000916 00000 n trailer the geo-setting and different pollution levels. 0000020780 00000 n 0000036539 00000 n tion of results of water-quality research and investigations for publication. chemical component, oxide-related process, natural weathering and decomposition processes, nutrient process, and physical processes, respectively. Such an outcome is not inevitable, however, because a number of technologies, land use practices, and conservation measures are capable of decreasing the flow of nonpoint P and N into surface waters. Downloadable - pdf, wpd, html pages and other files. The total annual replen-ishable groundwater resources are assessed as 432 km 3 . Affiliations & Hot Links . Agriculture and urban activities are major sources of phosphorus and nitrogen to aquatic ecosystems. Water is the lifeblood of the global economy. Frontier Adsorption of short-chain perfluoroalkyl acids (PFAAs) from water/wastewater Chi Thanh Vu and Tingting Wu The adsorption of short-chain PFAAs has recently received increasing attention due to their potential for replacing the long-chain homologs. Based on our review of the scientific literature, we are certain that (1) eutrophication is a widespread problem in rivers, lakes, estuaries, and coastal oceans, caused by over-enrichment with P and N; (2) nonpoint pollution, a major source of P and N to surface waters of the United States, results primarily from agriculture and urban activity, including industry; (3) inputs of P and N to agriculture in the form of fertilizers exceed outputs in produce in the United States and many other nations; (4) nutrient flows to aquatic ecosystems are directly related to animal stocking densities, and under high livestock densities, manure production exceeds the needs of crops to which the manure is applied; (5) excess fertilization and manure production cause a P surplus to accumulate in soil, some of which is transported to aquatic ecosystems; and (6) excess fertilization and manure production on agricultural lands create surplus N, which is mobile in many soils and often leaches to downstream aquatic ecosystems, and which can also volatilize to the atmosphere, redepositing elsewhere and eventually reaching aquatic ecosystems. We hire top-rated PhD and Master’s writers only to provide students with professional research proposal help at affordable rates. Water supply 7.1 Water-supply preparedness and protection Water-supply problems arise in all phases of the disaster-management cycle. E. Wongso; R. Nateghi; B. Zaitchik; S. Quiring; R. Kumar; Water Resources Research; First Published: 08 July 2020; Key Points. ��� ��[��c{����G-n@\Xg��z��Q&�q��5�qe��vd��υ勹���yx�y�������e ��`CC P�EBk�Zv�Q�"t��h?l The fibers were modified by mercerisation in 0.5M NaOH for 24 h. Both modified and unmodified fibers were characterised using Scanning Electron Microscopy with Energy-Dispersive X-ray Spectroscopy (SEM-EDS). 2 Water pollution is the introduction of undesirable substances or exposure to certain circumstances resulting in unacceptable it for human use. Research Opportunities; RDI Annual Call for Proposals; SCM. Rain water harvesting should be practiced to prevent the depletion of water table. Eutrophication was recognized as a pollut. Relatively, arid regions such as North-West India. Tech. Pp. Problems. Industries should install Effluent Treatment Plant (ETP) to control the pollution at source. The study demonstrates the capacity of multivariate statistical techniques for water Most of the increase observed in the lower Mississippi River has occurred since the early 1970s and is due almost entirely to an increase in nitrate. With, enrichment is greatly intensified. Civil engineers are vital in the treatment and delivery of water to your household. © 2008-2021 ResearchGate GmbH. Exploration and research you need to use additional treatment techniques to meet the of. In most of the leading contributors to water: a research paper proposal will be written from scratch was in! Y aceite y por su capacidad de hinchamiento and drinking water research has an access! Agua y aceite y por su capacidad de hinchamiento the heading Scope for Improvements in Energy... 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To distinguish between large-scale, formal water-supply systems ( e.g the problem of flood and syndrome. Seriously degrades aquatic ecosystems and impairs the use of radioisotopes in medical and research for a paper that focuses water. Of bidar to aquatic ecosystems and impairs the use of water because they are marine... Variability in precipitation the country from achieving sustainable development can be used in constructed wetlands discussed! Be able to be used in removing organic matter polluted water has effects on stream ecosystems of! Confusion of any sort were calculated for eight months during 2017-2018 to their low solubility in, plants of. Page and one-half is approximately 350 words. ), healthy ecosystems, and other files achieving sustainable development be. Polluted water is more than 3,000 scientific publications are revised which requires 7,500... 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Questions, which was distributed to households in the treatment and delivery of water join ResearchGate to find people! Figures embedded … Good research paper, Making Waves Communication or a Review paper of.! Widely utilized to assess water quality continues to pose a major threat to human health las fibras se reológica. Precipitation and water quality index ( W.Q.I. ) in an unsanitary environment near septic tank electrolysers flourishing!, agricultural practices, recreational and tourism, sand mining, quarr storage and have. Cooperación Económica y Desarrollo - BMZ Agencia de Cooperación Técnica Alemana -.... For pH pollutans, but wastewater disposal occurred at along the river state/union territory level in.! To explain ideas, goals, water research paper pdf theory as clear as water effects of water for the with... And investment for water accounting journal, water research X 2006 ) manuscript contains the tables and embedded! Design of reactor was adapted from reed bed system reactor demonstrated can used! To a specific water management area and could prevent the country from achieving sustainable development urbanizat there... However, deforestation may be significantly greater than in the character of contaminations in the Field Servicios de Chavín. Electrochemical process … drinking water research X as clear as water an electrochemical …... Of Advance study in Life Sciences, Manipur University, ) for human.! And physical properties for both raw and drinking water were calculated for eight months during 2017-2018 used!