ASSESSMENT OF ELECTROCOAGULATION PROCESS. APPLICATION IN ARSENIC REMOVAL FROM DRINKING WATER

2017 ◽  
Vol 16 (4) ◽  
pp. 821-828 ◽  
Author(s):  
Florica Manea ◽  
Aniela Pop ◽  
Anamaria Baciu ◽  
Gyongyke Wanko ◽  
Katalin Bodor ◽  
...  
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Electrocoagulation Process

scholarly journals Arsenic and Fluoride in Groundwater, Prevalence and Alternative Removal Approach

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1191
Author(s):  
Adriana Robledo-Peralta ◽  
Miriam López-Guzmán ◽  
Corazón G. Morales-Amaya ◽  
Liliana Reynoso-Cuevas
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Fluoride Removal ◽  
Well Water ◽  
Initial Concentration ◽  
Operational Conditions ◽  
Groundwater Arsenic ◽  
Electrocoagulation Process ◽  
Alternative Approaches ◽  
Interfering Ions

Contamination of drinking water by arsenic and fluoride is a global problem, as more than 300 million people in more than 100 countries have been affected by their presence. These elements are considered the most serious contaminants in drinking water and their removal is a worldwide concern. Therefore, the evaluation of three alternative approaches—electrocoagulation, adsorption by biomaterials, and adsorption by metal oxide magnetic nanoparticles (MNPs)—was performed for arsenic and fluoride removal from groundwater. Arsenic removal from synthetic and groundwater (well water) was accomplished with the three processes; meanwhile, fluoride removal from groundwater was only reported by two methods. The results indicate that an electrocoagulation process is a good option for As (>97%) and F (>90%) removal in co-occurrence; however, the operational conditions for the removal of both pollutants must be driven by those used for fluoride removal. As (80–83%) and F (>90%) removal with the biomaterials was also successful, even when the application objective was fluoride removal. Finally, MNPs (Co and Mn) were designed and applied only for arsenic removal and reached >95%. Factors such as the pH, the presence of interfering ions, and the initial concentration of the contaminants are decisive in the treatment process’s efficiency.

ASSESSMENT OF ELECTROCOAGULATION PROCESS FOR DRINKING WATER TREATMENT

2015 ◽  
Vol 14 (6) ◽  
pp. 1347-1354 ◽  
Author(s):  
Florica Manea ◽  
Anamaria Baciu ◽  
Aniela Pop ◽  
Katalin Bodor ◽  
Ilie Vlaicu
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Electrocoagulation Process

Development of a low-waste technology for arsenic removal from drinking water

2003 ◽  
pp. 491-501 ◽  
Author(s):  
József Hlavay ◽  
Klára Polyák ◽  
János Molnár ◽  
Kornél Gruber ◽  
Pál Medgyesi ◽  
...  
Keyword(s):  
Drinking Water ◽  
Arsenic Removal

scholarly journals Nanofiltration for Arsenic Removal: Challenges, Recent Developments, and Perspectives

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1323 ◽  
Author(s):  
TA Siddique ◽  
Naba K. Dutta ◽  
Namita Roy Choudhury
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Environmental Concern ◽  
Low Cost ◽  
Inorganic Arsenic ◽  
Water Security ◽  
Polymer Nanocomposite ◽  
Life Forms ◽  
Current Status ◽  
The Status

Arsenic (As) removal is of major significance because inorganic arsenic is highly toxic to all life forms, is a confirmed carcinogen, and is of significant environmental concern. As contamination in drinking water alone threatens more than 150 million people all over the world. Therefore, several conventional methods such as oxidation, coagulation, adsorption, etc., have been implemented for As removal, but due to their cost-maintenance limitations; there is a drive for advanced, low cost nanofiltration membrane-based technology. Thus, in order to address the increasing demand of fresh and drinking water, this review focuses on advanced nanofiltration (NF) strategy for As removal to safeguard water security. The review concentrates on different types of NF membranes, membrane fabrication processes, and their mechanism and efficiency of performance for removing As from contaminated water. The article provides an overview of the current status of polymer-, polymer composite-, and polymer nanocomposite-based NF membranes, to assess the status of nanomaterial-facilitated NF membranes and to incite progress in this area. Finally, future perspectives and future trends are highlighted.

scholarly journals Experimenting with a novel technology for provision of safe drinking water in rural Bangladesh: The case of sub-surface arsenic removal (SAR)

2018 ◽  
Vol 53 ◽  
pp. 161-172 ◽  
Author(s):  
Debasish Kumar Kundu ◽  
Aarti Gupta ◽  
Arthur P.J. Mol ◽  
Mohammad Moshiur Rahman ◽  
Doris van Halem
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Safe Drinking Water ◽  
Rural Bangladesh ◽  
Novel Technology

scholarly journals Alginate-based biotechnology: a review on the arsenic removal technologies and future possibilities

2019 ◽  
Vol 68 (6) ◽  
pp. 369-389 ◽  
Author(s):  
Shakhawat Chowdhury ◽  
Imran Rahman Chowdhury ◽  
Fayzul Kabir ◽  
Mohammad Abu Jafar Mazumder ◽  
Md. Hasan Zahir ◽  
...  
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Alginate Bead ◽  
Alginate Beads ◽  
Industrial Applications ◽  
Mass Scale ◽  
Future Research ◽  
Large Area ◽  
Arsenic Adsorption ◽  
Wide Range

Abstract The alginate-based adsorption technologies have emerged as potential methods for arsenic removal from drinking water. The adsorbents (iron oxide, hydroxide, nano zero valent iron (nZVI), industrial waste, minerals, magnetite, goethite, zirconium oxide, etc.) are impregnated into alginate beads to produce the media. The biocompatibility, rough surface with large area, and amorphous and high water permeable bead structure improve arsenic adsorption efficiency while the regeneration process is simpler than the conventional adsorbents. In recent years, studies have reported laboratory-scale applications of alginate beads, encapsulated and impregnated with adsorbents, for arsenic removal from drinking water. The arsenic removal efficiencies were reported to be over 95% with a wide range of concentrations (10–1,000 parts per billion) and pH (3.0–7.5). However, commercial- and/or mass-scale applications have not been reported yet, due possibly to overall cost, complexity, reusability, and arsenic waste-laden sludge management. In this paper, research achievement on arsenic removal using alginate-based adsorbents has been reviewed. The review was performed in context to alginate bead development, adsorbent encapsulation and impregnation, application, performance, and regeneration. The advantages and limitations of the methods were analyzed and the scopes of future research were identified for mass scale domestic and industrial applications.

Arsenic removal - experience with the GEH® process in Germany

2002 ◽  
Vol 2 (2) ◽  
pp. 275-280 ◽  
Author(s):  
W. Driehaus
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Ferric Hydroxide ◽  
Drinking Water Treatment ◽  
Treatment Results ◽  
Design Data ◽  
Drinking Water Standard ◽  
Water Treatment Plants ◽  
Trade Name ◽  
Granular Ferric Hydroxide

The reduced German drinking water standard for arsenic of 10 μg/L initiated the development of a new adsorbent, the granular ferric hydroxide. It was introduced into the market in 1997 under the trade name GEH®. 16 drinking water treatment plants for arsenic removal are now using this technique in Germany. The article gives a brief overview over this applications, the design data and the treatment results. This technique requires only small contact times between 3 and 10 minutes, whereas the treatment capacities are up to 250,000 bed volumes. The average treatment costs, including media supply, media exchange service and disposal, are 0.04 EURO per m3 treated water.

Application of reverse osmosis technology for arsenic removal from drinking water

Desalination ◽  
2006 ◽  
Vol 200 (1-3) ◽  
pp. 725-727 ◽  
Author(s):  
M.M. Gholami ◽  
M.A. Mokhtari ◽  
A. Aameri ◽  
M.R. Alizadeh Fard
Keyword(s):  
Drinking Water ◽  
Reverse Osmosis ◽  
Arsenic Removal
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