scholarly journals Arsenic Removal from Contaminated Water Using Natural Adsorbents: A Review

Coatings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1407
Author(s):  
Kanfolo Franck Herve YEO ◽  
Chaokun Li ◽  
Hui Zhang ◽  
Jin Chen ◽  
Wendong Wang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Flow Rate ◽  
Contact Time ◽  
Arsenic Removal ◽  
Polluted Water ◽  
Contaminated Water ◽  
Natural Materials ◽  
The Past ◽  
Natural Adsorbents

More than 170 million individuals have been influenced by arsenic (As) because of the ingestion of As-polluted groundwater. The presence of As in water bodies, particularly groundwater, has been found to become a widespread issue in the past few decades. Because arsenic causes extreme wellbeing impacts, even at a low concentration in drinking water, the innovations of As removal from contaminated water are of significant importance. Traditional strategies, for example, reverse osmosis, ion exchange, and electro-dialysis are generally utilized for the remediation of As-polluted water; however, the high cost and/or sludge production restricts their application in less-developed areas. The utilization of adsorbents acquired from natural materials has been explored as an alternative for the costly techniques for As removal. This paper aims to review the past and current developments in using naturals adsorbents or modified natural materials for arsenic removal and show the different parameters, which may influence the As removal effectiveness of the natural adsorbent, such as contact time, adsorbent dosage, flow rate, pH, reusability, temperature, and influence of others ions.

scholarly journals Evaluation of modified montmorillonite with di-cationic surfactants as efficient and environmentally friendly adsorbents for arsenic removal from contaminated water

2017 ◽  
Vol 18 (2) ◽  
pp. 460-472 ◽  
Author(s):  
E. Shokri ◽  
R. Yegani ◽  
B. Pourabbas ◽  
B. Ghofrani
Keyword(s):  
Contact Time ◽  
Arsenic Removal ◽  
Environmentally Friendly ◽  
Contaminated Water ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
Modified Montmorillonite ◽  
Adsorption Capacities ◽  
Modified Adsorbents ◽  
Adsorption Desorption

Abstract In this work, montmorillonite (Mt) was modified by environmentally friendly arginine (Arg) and lysine (Lys) amino acids with di-cationic groups for arsenic removal from contaminated water. The modified Mts were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, zeta potential and thermal analysis. The adsorption of As(V) onto modified Mts as a function of initial As(V) concentration, contact time and solution pH was investigated. The removal efficiency was increased with increasing the As(V) concentration and contact time; however, it was decreased with increasing solution pH. The maximum As(V) adsorption capacities of Mt-Arg and Mt-Lys were 11.5 and 11 mg/g, respectively, which were five times larger than pristine Mt. The high adsorption capacity makes them promising candidates for arsenic removal from contaminated water. The regeneration studies were carried out up to 10 cycles for both modified Mts. The obtained results confirmed that the modified adsorbents could also be effectively used for As(V) removal from water for multiple adsorption – desorption cycles.

scholarly journals Groundwater Arsenic Contamination in West Bengal: Current Scenario, Effects and Probable Ways of Mitigation

2014 ◽  
Vol 13 ◽  
pp. 45-58 ◽  
Author(s):  
Tanmoy Kumar Dey ◽  
Priya Banerjee ◽  
Madhurima Bakshi ◽  
Abhirupa Kar ◽  
Somdeep Ghosh
Keyword(s):  
Drinking Water ◽  
Chronic Exposure ◽  
West Bengal ◽  
Contaminated Water ◽  
Safe Drinking Water ◽  
Essential Step ◽  
The Past ◽  
Groundwater Arsenic ◽  
Current Scenario ◽  
Mind Set

During the past two decades, Arsenic (As) contamination via groundwater has become a serious issue worldwide and is now a major concern in the Indo-Bangladesh Gangetic delta. Arsenic enters human body through contaminated groundwater consumed as drinking water. Food safety in this region is also facing severe consequences as bio-accumulation of Arsenic is occurring in food crops irrigated with As-contaminated water. Chronic exposure to Arsenic can cause not only cancerous and non-cancer health effects. Reports suggest that about 20 % population in West Bengal is highly affected. Various techniques are being introduced to provide arsenic-free drinking water at an affordable cost. But a rigorous change in habit and mind set for procuring safe drinking water in those surviving in As-contaminated zones is the most essential step towards curbing the fatal consequences of As exposure. Harvesting rain water and utilization of proper purification techniques can be considered a possible alternative of safe drinking water.

scholarly journals Fabrication of potable and eco-friendly solar disinfection (sodis) unit and its performance analysis

2021 ◽  
Vol 8 (1) ◽  
pp. 41-50
Author(s):  
Malavika J P ◽  
Shobana C
Keyword(s):  
Drinking Water ◽  
Solar Energy ◽  
Water Samples ◽  
Polluted Water ◽  
Contaminated Water ◽  
Treated Water ◽  
Solar Disinfection ◽  
E Coli ◽  
Pet Bottles ◽  
Disinfection Unit

Solar disinfection (SODIS) is a technique, which involves utilization of solar energy to make safe drinking water from biologically contaminated water. In the conventional SODIS method, the PET bottles are filled with polluted water and exposed to the sunlight for a certain period depending upon the local weather conditions. However much more effective disinfection system is needed to overcome the problems of inefficient utilization of available solar energy and the health risk posed by treating the water using chemicals during the purification process.  Hence, the present work aims in designing a portable solar disinfection unit that can efficiently use solar energy by manually adjusting the unit according to sunlight availability. Along with it, incorporation of the additional eco-friendly unit with water purifying plants Vetiveria zizanioides (Vetiver) and Hemidesmus indicus (Nannari) is done to achieve high efficiency in producing potable water from biologically contaminated water. The contaminated water samples treated in the solar disinfection unit and eco-friendly water purifying unit are analyzed for the presence of total coliforms and E-coli by using the Most probable Number method and P/A analysis, respectively. A reduction in 99.74% of total coliform count and absence of E-coli was observed in the treated water samples.  The physicochemical analysis was carried out to ensure the suitability of treated water for consumption and the results revealed a notable reduction in the parameters, and all the parameters came under the permissible range of IS drinking water characteristics. The designed system can be used to disinfect the contaminated water sample most efficiently, thereby making the water suitable for consumption.

scholarly journals Investigation of Lead Removal from Drinking Water Using Different Sorbents

2020 ◽  
Vol 27 (1) ◽  
pp. 67-82
Author(s):  
Ramunė Albrektienė ◽  
Dainius Paliulis
Keyword(s):  
Heavy Metal ◽  
Drinking Water ◽  
Contact Time ◽  
Chemical Element ◽  
Sorption Process ◽  
Polluted Water ◽  
Lead Removal ◽  
Contact Duration ◽  
Test Water ◽  
Effective Sorbent

AbstractLead is a heavy metal with strong toxic properties. This chemical element is found in wastewater and sometimes in drinking water. The article deals with the removal of lead(II) ions from polluted water using a sorption process to determine the most effective sorbent for the removal of lead(II) ions. Three sorbents were used in the research: clay, sapropel, and iron sludge. All three sorbents investigated reduce the concentration of lead(II) ions in water: clay efficiency was of 65.7–90 %, sapropel of 94.3–100 %, and iron sludge of 84.3–97 %, depending on sorbent type and contact duration. The research has shown that the most effective way to remove lead(II) ions from the test water is sapropel. Using different amounts of sapropel (1, 2, 3, 4, 5, 6 g/dm3 and 0.1, 0.2, 0.4, 0.5, 0.6, 0.8 g/dm3) and different duration of contact (30, 60, 90, 120 and 150 minutes), the concentration of lead(II) ions in the test water after purification did not exceed the permissible values for drinking water (10 μg/dm3), so that the lowest sapropel content of 0.1 g/dm3 can be used for sorption. Lead(II) ions are most effectively removed when contact time is 30 min.

ARSENIC REMOVAL FROM DRINKING WATER BY ION EXCHANGE RESINS

2004 ◽  
Vol 3 (3) ◽  
pp. 283-291 ◽  
Author(s):  
Carmen Iesan ◽  
Satish S. Bapat ◽  
Bill Fries ◽  
Didi Coman ◽  
Doina Florea
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Arsenic Removal ◽  
Ion Exchange Resins ◽  
Exchange Resins

Removal of fluorides from water using low cost adsorbents

2002 ◽  
Vol 2 (1) ◽  
pp. 311-317 ◽  
Author(s):  
P.D. Nemade ◽  
A. Vasudeva Rao ◽  
B.J. Alappat
Keyword(s):  
Drinking Water ◽  
Low Cost ◽  
Fish Bone ◽  
Fluoride Removal ◽  
Batch Adsorption ◽  
Contaminated Water ◽  
The Past ◽  
Considerable Research ◽  
Bone Charcoal ◽  
Brick Powder

During the past few years, intensive interest in the problem of excessive fluorides in drinking water is a matter of serious concern around the world, as it causes fluorosis, a disease that affects teeth and bones. In India, the states of Rajasthan, Gujarath and Andhra Pradesh have a large number of villages where ground water contains excessive fluorides. India is among the 23 nations around the globe where health problems occur due to the consumption of fluoride contaminated water. Considerable research has been carried out to remove fluoride from the drinking water to overcome its toxic effect. This paper provides a review of the scientific literature on the varied aspects of fluorine chemistry, its occurrence, distribution and use of low cost adsorbents. Batch adsorption studies were carried out to determine the fluoride removal efficiency of fly ash, brick powder, wood charcoal, animal charcoal, fish bone charcoal, etc. Based on the efficiency, economy and usage of various low cost adsorbents specified above, the fish bone charcoal showed a comparatively higher fluoride removal than other adsorbents used. So that the problem of heavy fluoride in the drinking water in various states of India can be efficiently solved. Hence the dream of the WHO can be turned into reality and thus reduce hospital loads by 90%.

scholarly journals Arsenic removal from drinking water using low-pressure nanofiltration under various operating conditions

2018 ◽  
Vol 13 (2) ◽  
pp. 295-302 ◽  
Author(s):  
M. Harfoush ◽  
S. A. Mirbagheri ◽  
M. Ehteshami ◽  
S. Nejati
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Arsenic Concentration ◽  
Inorganic Arsenic ◽  
Low Pressure ◽  
Operating Conditions ◽  
Polluted Water ◽  
Initial Concentration ◽  
Wide Range ◽  
Arsenite Removal

Abstract Currently, one of the main environmental concerns is the toxicity caused by arsenic. Arsenic-polluted water can cause many human health problems including various cancerous diseases. In natural water, inorganic arsenic can be found in the forms of arsenite and arsenate, which have been found in several Iranian provinces – e.g., East Azerbaijan, Kurdistan, and the city of Bijar – in high concentrations. Modern nanofiltration (NF) technology enables a wide range of water resource pollutants to be controlled efficiently. In this study, in an attempt to enhance arsenic removal (both arsenite and arsenate) from drinking water using low pressure NF, operating conditions like arsenic concentration, the trans-membrane pressure applied, and a range of different temperatures have all been considered. The highest arsenate removal achieved was 94% with an initial concentration of 500 μg/L, at 7 bar pressure, and 28 °C. The highest arsenite removal was 90%, with an initial concentration of 100 μg/L, at 5 bar pressure, and also at 28 °C. Increasing the pressure had a positive effect on the removal of both species, however, increasing the temperature had negative impacts. It was always found that arsenate removal was better than arsenite removal.

scholarly journals An overview of main arsenic removal technologies

2018 ◽  
Vol 11 (2) ◽  
pp. 107-113 ◽  
Author(s):  
Ronald Zakhar ◽  
Ján Derco ◽  
František Čacho
Keyword(s):  
Drinking Water ◽  
Membrane Filtration ◽  
Arsenic Removal ◽  
Chemical Precipitation ◽  
Contaminated Water ◽  
The World ◽  
Removal Processes ◽  
Removal Technologies ◽  
High Concentrations ◽  
Exchange Membrane

Abstract Arsenic (As) is metalloid, naturally present in the environment but also introduced by human activities. It is toxic and carcinogenic and its exposure to low or high concentrations can be fatal to human health. Arsenic contamination in drinking water threatens more than 150 million peoples all over the world. Therefore, treatment of As contaminated water is of unquestionable importance. The present review begins with an overview of As chemistry, distribution and toxicity, which are relevant aspects to understand and develop remediation techniques. The most common As removal processes (chemical precipitation, adsorption, ion exchange, membrane filtration, phytoremediation and electrocoagulation) are presented with discussion of their advantages, drawbacks and the main recent achievements.

Arsenic removal from drinking water through a hybrid ion exchange membrane – Coagulation process

2011 ◽  
Vol 83 ◽  
pp. 137-143 ◽  
Author(s):  
Adrian Oehmen ◽  
Rita Valerio ◽  
Javier Llanos ◽  
Joana Fradinho ◽  
Susana Serra ◽  
...  
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Arsenic Removal ◽  
Ion Exchange Membrane ◽  
Coagulation Process ◽  
Exchange Membrane

scholarly journals Hydrous cerium oxides coated glass fiber for efficient and long-lasting arsenic removal from drinking water

2021 ◽  
Vol 10 (2) ◽  
pp. 247-257 ◽  
Author(s):  
Ronghui Li ◽  
Weiyi Yang ◽  
Shuang Gao ◽  
Jianku Shang ◽  
Qi Li
Keyword(s):  
Experimental Data ◽  
Drinking Water ◽  
Glass Fiber ◽  
Arsenic Removal ◽  
World Health ◽  
Polluted Water ◽  
Column Test ◽  
Order Model ◽  
Treated Water ◽  
Cerium Oxides

AbstractA novel arsenic adsorbent with hydrous cerium oxides coated on glass fiber cloth (HCO/GFC) was synthesized. The HCO/GFC adsorbents were rolled into a cartridge for arsenic removal test. Due to the large pores between the glass fibers, the arsenic polluted water can flow through easily. The arsenic removal performance was evaluated by testing the equilibrium adsorption isotherm, adsorption kinetics, and packed-bed operation. The pH effects on arsenic removal were conducted. The test results show that HCO/GFC filter has high As(V) and As(III) removal capacity even at low equilibrium concentration. The more toxic As(III) in water can be easily removed within a wide range of solution pH without pre-treatment. Arsenic contaminated ground-water from Yangzong Lake (China) was used in the column test. At typical breakthrough conditions (the empty bed contact time, EBCT = 2 min), arsenic researched breakthrough at over 24,000 bed volumes (World Health Organization (WHO) suggested that the maximum contaminant level (MCL) for arsenic in drinking water is 10 mg/L). The Ce content in the treated water was lower than 5 ppb during the column test, which showed that cerium did not leach from the HCO/GFC material into the treated water. The relationship between dosage of adsorbents and the adsorption kinetic model was also clarified, which suggested that the pseudo second order model could fit the kinetic experimental data better when the adsorbent loading was relatively low, and the pseudo first order model could fit the kinetic experimental data better when the adsorbent loading amount was relatively high.

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