scholarly journals Removal of Arsenic in Groundwater Using Fe(III) Oxyhydroxide Coated Sand: A Case Study in Mekong Delta, Vietnam

Hydrology ◽  
2022 ◽  
Vol 9 (1) ◽  
pp. 15
Author(s):  
Lavane Kim ◽  
Nguyen Truong Thanh ◽  
Pham Van Toan ◽  
Huynh Vuong Thu Minh ◽  
Pankaj Kumar
Keyword(s):  
Low Cost ◽  
Mekong Delta ◽  
Treatment System ◽  
Batch Adsorption ◽  
Domestic Water ◽  
Arsenic In Groundwater ◽  
Information Gap ◽  
Cost Treatment ◽  
Coated Sand ◽  
Removal Of Arsenic

Because of its threat to the quality of freshwater resources and human health, arsenic (As) pollution is important to scientific communities and policymakers around the world. The Mekong Delta, Vietnam, is one hotspot of As pollution. Its risk assessment of different environmental components has been well documented; however, very few studies focus on As removal techniques. Considering this information gap, this study aimed to investigate the performance of an innovative and low-cost treatment system using Fe(III)-oxyhydroxide (FeOOH) coated sand to remove As(III) from aqueous solution. Batch and column experiments were conducted at a laboratory scale in order to study removal kinetics and efficiency. Experimental results indicated that the adsorption isotherm of As(III) on FeOOH coated sand using Langmuir and Freundlich models have high regression factors of 0.987 and 0.991, respectively. The batch adsorption experiment revealed that contact time was approximately 8 h for rough saturation (kinetic test). The concentration of As(III) in effluents at flow rates of 0.6 L/h, 0.9 L/h, and 1.8 L/h ranged from 1.1 µg/L to 1.7 µg/L. Results from this study indicated that FeOOH coated sand columns were effective in removing As(III) from water, with a removal efficiency of 99.1%. Ultimately, FeOOH coated sand filtration could be a potential treatment system to reduce As(III) in the domestic water supply in remote areas of the Vietnamese Mekong Delta.

A contribution to solve the arsenic problem in groundwater of Ganges Delta by in-situ treatment

2008 ◽  
Vol 58 (10) ◽  
pp. 2009-2015 ◽  
Author(s):  
U. Rott ◽  
H. Kauffmann
Keyword(s):  
Arsenic Removal ◽  
Low Cost ◽  
Treatment Plant ◽  
Cost Effective ◽  
Treatment Technology ◽  
Manganese Removal ◽  
Arsenic In Groundwater ◽  
Cost Effective Treatment ◽  
Removal Of Arsenic

Arsenic in groundwater is a huge problem in numerous regions of the world. Many people are exposed to high arsenic concentrations and consequently risk getting ill or even die as a result of arsenic poisoning. There are several efficient technologies for the removal of arsenic but often these methods have disadvantages, e.g. high costs for installation and/or operation, the need for chemicals or the production of arsenic contaminated filter sludge. These disadvantages can make the application difficult, especially in poor regions. Under suitable ancillary conditions the subterranean (in-situ) treatment, which is often used for iron and manganese removal from groundwater, can also be applied for the removal of arsenic and can be a cost-effective treatment technology. A field trial was carried out with a low-cost in-situ treatment plant in West Bengal/India which is described in this paper, in order to investigate whether this treatment technology is also applicable under the boundary conditions there. As for the in-situ treatment technology besides oxygen no additives are required and no arsenic contaminated filter sludge is produced this technology could be a suitable method for arsenic removal especially in poor regions.

Management of Dairy Waste: A Low Cost Treatment System Using Phosphorus-Adsorbing Materials

1993 ◽  
Vol 27 (1) ◽  
pp. 159-169 ◽  
Author(s):  
B. K. Masters
Keyword(s):  
Water Quality ◽  
Low Cost ◽  
Surface Water Quality ◽  
Theoretical Background ◽  
Treatment System ◽  
Environmental Implications ◽  
Ground Waters ◽  
Dairy Waste ◽  
Dairy Wastes ◽  
Cost Treatment

Dairy wastes are a source of nutrient pollution of surface and ground waters in high rainfall areas of south west Western Australia. Many of the state's 546 dairies are sited over soils that are either sandy, leading to pollution of ground waters, or clayey, causing reductions in surface water quality. Awareness of the environmental implications of their activities is motivating dairy farmers to join Land Conservation District Committees, where water quality improvement is a primary goal. A low cost treatment system has been designed to reduce the water pollution potential of dairy waste. It incorporates three stages: a sump in which anaerobic digestion occurs; an aerobic vegetated filter with a base of permeable phosphorus-absorbing material; and an irrigated plantation or crop using water that has passed through the system. This paper describes the theoretical background to the design.

scholarly journals Kinetic Study & Statistical Modelling of Sarawak Peat Water Electrocoagulation System using Copper and Aluminium Electrodes

2020 ◽  
Vol 7 (1) ◽  
pp. 439-456
Author(s):  
Nazeri Abdul Rahman ◽  
Nurhidayah Kumar Muhammad Firdaus Kumar ◽  
Umang Jata Gilan ◽  
Elisa Elizebeth Jihed ◽  
Adarsh Phillip ◽  
...  
Keyword(s):  
Water Treatment ◽  
Kinetic Study ◽  
Process Optimization ◽  
Low Cost ◽  
Kinetic Studies ◽  
Statistical Modelling ◽  
Treatment System ◽  
Waterborne Diseases ◽  
Domestic Water ◽  
Cost Effective Treatment

Due to insufficient water supply, the residents of the rural area of Sarawak are forced to use peat water as daily use for domestic water. The consumption of untreated peat water can lead to various waterborne diseases such as diarrhoea, and other serious illnesses such as typhoid and dysentery. Water treatment system such as electrocoagulation system can be developed to improve the water quality of the peat water as electrocoagulation requires simple equipment that can be operated easily, no usage of chemicals coagulant, producing less sludge and cost-effective treatment system. The main aim of this study is to develop a kinetic study and statistical modelling for both batch and continuous electrocoagulation processes of peat water treatment in Sarawak using aluminium and copper electrodes. This study focuses on the peat water treatment using electrocoagulation system. The fabricated electrocoagulation system is designed according to the characteristics in which the technology for building and the material used for constructing the electrocoagulation system should be available locally, the electrocoagulation system should be easy to fabricate and maintain, as well as low cost for construction and operation. For this study, Response Surface Methodology in Minitab software and Microsoft Excel are used for kinetic studies, statistical modelling, and process optimization. Process optimization is carried out to minimize energy consumption as well as the turbidity and TSS level. The optimum conditions for batch and continuous electrocoagulation system are 14.899 A/m2 and 41.818 min, and 3.861 A/m2 and 37.778 min respectively.

Adsorption and removal of arsenic from water by iron ore mining waste

2009 ◽  
Vol 60 (9) ◽  
pp. 2301-2308 ◽  
Author(s):  
Tien Vinh Nguyen ◽  
Thi Van Trang Nguyen ◽  
Tuan Linh Pham ◽  
Saravanamuth Vigneswaran ◽  
Huu Hao Ngo ◽  
...  
Keyword(s):  
Iron Ore ◽  
Low Cost ◽  
Arsenic Concentration ◽  
Cost Effective ◽  
Treatment System ◽  
Household Water ◽  
New Material ◽  
Individual Household ◽  
Removal Of Arsenic ◽  
Iron Manganese

There is a global need to develop low-cost technologies to remove arsenic from water for individual household water supply. In this study, a purified and enriched waste material (treated magnetite waste, TMW) from the Trai Cau's iron ore mine in the Thai Nguyen Province in Vietnam was examined for its capacity to remove arsenic. The treatment system was packed with TMW that consisted of 75% of ferrous-ferric oxide (Fe3O4) and had a large surface area of 89.7 m2/g. The experiments were conducted at a filtration rate of 0.05 m/h to treat groundwater with an arsenic concentration of 380 μg/L and iron, manganese and phosphate concentrations of 2.07 mg/L, 0.093 mg/L and 1.6 mg/L respectively. The batch experimental results show that this new material was able to absorb up to 0.74 mg arsenic/g. The results also indicated that the treatment system removed more than 90% arsenic giving an effluent with an arsenic concentration of less than 30 μg/L while achieving a removal efficiency of about 80% for Mn2 +  and PO43−. This could be a promising and cost-effective new material for capturing arsenic as well as other metals from groundwater.

Purification of liquid scintillation waste from binding radionuclides using different adsorbents

2020 ◽  
Vol 108 (11) ◽  
pp. 879-887
Author(s):  
Maha A. Youssef ◽  
Hoda E. Rizk ◽  
Mohamed F. Attallah
Keyword(s):  
Liquid Scintillation ◽  
Low Cost ◽  
Packed Column ◽  
Nuclear Research ◽  
Treatment Method ◽  
Batch Adsorption ◽  
Cost Treatment ◽  
Successful Removal ◽  
Loaded Column ◽  
Research Facilities

AbstractThe quantity of liquid organic radioactive wastes produced by the use of radioactive materials in nuclear research facilities is small compared to aqueous radioactive waste, but a special and low-cost treatment method is needed. Here we investigated the adsorption performance of five materials, namely: KU-2 resin, bentonite, charcoal (M&S) and clay adsorbents for the successful removal of 90Sr/90Y from liquid scintillation cocktail waste. The batch adsorption technique (influence of pH, contact time, and temperature), sequential, and column technique were investigated. The efficiency of these adsorbents for the removal of 90Sr/90Y is in this order, resin > bentonite > clay with removal efficiency 90 ± 5.2, 68 ± 3.25, and 65 ± 5.3%, respectively. While charcoal has lower affinity for the sorption processes. Purification of liquid scintillation (LS) cocktail by separation of 90Sr/90Y was successfully carried out by packed column with KU-2 resin. The exhausted loaded column with 90Sr/90Y is successfully regenerated by 25 mL, 1 M HNO3. Characterizations of the original and the purified LS cocktail were carried out using FTIR analysis. The efficiency of the purified liquid scintillation waste (LSW) for the determination of radionuclide is about 62.67 ± 4.8.

Biological AsIII oxidation and arsenic sequestration onto ZVI-coated sand in an up-flow fixed-bed reactor

2012 ◽  
Vol 12 (1) ◽  
pp. 82-89 ◽  
Author(s):  
J. F. Wan ◽  
Y. Zhu ◽  
S. Simon ◽  
M. C. Dictor ◽  
V. Deluchat ◽  
...  
Keyword(s):  
Low Cost ◽  
Fixed Bed ◽  
Operating Parameter ◽  
Fixed Bed Reactor ◽  
Filling Material ◽  
Hydraulic Residence Time ◽  
Treatment Processes ◽  
Cost Treatment ◽  
Coated Sand

A strict authorized Arsenic (As) level (10 μg L−1) in drinking water requires the development of low-cost treatment processes. Biological treatment of AsIII (major specie in groundwater) using AsIII-oxidizing bacteria (AOB) can be used as an effective pre-oxidation step followed by As removal onto zero valent iron-coated sand. However, the efficiency of As sorption could be affected by a possible development of the bacterial communities in the ZVI-coated sand system. The aims of this work were to study the role of the AOB communities on the filling material (sand or ZVI-coated sand) and to estimate simultaneous biological AsIII oxidation and As sorption onto ZVI in a single fixed-bed reactor. Thiomonas arsenivorans, an autotrophic AOB was inoculated in only one of two parallel fixed-bed reactors filled with sand mixed with 1% iron (wFe/wsand). Both reactors were then continuously fed with synthetic water containing 10 mg L−1 of AsIII under a high Hydraulic Residence Time (HRT) (4 h) for 23 days and then under lower HRT (1 h) for 10 days. 80% of total As were removed in the non-inoculated reactor under high HRT while only 15% were removed under HRT of 1 h. Hence HRT was a key operating parameter in the fixed-bed system. The inoculated AOB bacterial community could disturb the As sorption under high HRT, while the As removal efficiency under low HRT was better than in the absence of the inoculums. At the end of the experiment, ZVI (and/or its oxide products) was collected at different layers in both reactors. Residual adsorption capacities were evaluated with batch experiments which showed that some layers were not saturated and continued to remove As. PCR-DGGE of aoxB gene was also used to identify the distribution of AOB among these different layers.

Parameters Affecting Dye Adsorption - Using Graphene Coated Sand (GSC)

2018 ◽  
Vol 4 (02) ◽  
Author(s):  
Seroor Atalah Khaleefa Alia ◽  
Dr. Mohammed Ibrahimb ◽  
Hussein Ali Hussein
Keyword(s):  
Heavy Metals ◽  
Contact Time ◽  
Organic Dyes ◽  
Low Cost ◽  
Dye Adsorption ◽  
Contaminated Water ◽  
Maximum Adsorption Capacity ◽  
Engineering Designs ◽  
Heavy Metals Ions ◽  
Coated Sand

Adsorption is most commonly applied process for the removal of pollutants such as dyes and heavy metals ions from wastewater. The present work talks about preparing graphenic material attached sand grains called graphene sand composite (GSC) by using ordinary sugar as a carbon source. Physical morphology and chemical composition of GSC was examined by using (FTIR, SEM, EDAX and XRD). Efficiency of GSC in the adsorption of organic dyes from water was investigated using reactive green dye with different parameters such as (ph, temperature, contact time and dose). Adsorption isotherm was also studied and the results showed that the maximum adsorption capacity of dye is 28.98 mg/g. This fast, low-cost process can be used to manufacture commercial filters to treat contaminated water using appropriate engineering designs.

Application of iron-coated sand on the treatment of toxic metals

2004 ◽  
Vol 4 (5-6) ◽  
pp. 335-341 ◽  
Author(s):  
Jae-Kyu Yang ◽  
Yoon-Young Chang ◽  
Sung-Il Lee ◽  
Hyung-Jin Choi ◽  
Seung-Mok Lee
Keyword(s):  
Heavy Metals ◽  
Selective Adsorption ◽  
Complete Removal ◽  
Batch Adsorption ◽  
Column Experiments ◽  
Adsorption Behaviour ◽  
Optimum Amount ◽  
Initial Ph ◽  
New Treatment ◽  
Coated Sand

Iron-coated sand (ICS) prepared by using FeCl3 and Joomoonjin sand widely used in Korea was used in this study. In batch adsorption kinetics, As(V) adsorption onto ICS was completed within 20 minutes, while adsorption of Pb(II), Cd(II), and Cu(II) onto ICS was slower than that of As(V) and strongly depended on initial pH. At pH 3.5, ICS showed a selective adsorption of Pb(II) compared to Cd( II) and Cu(II) . However, above pH 4.5, near complete removal of Pb(II), Cd(II), and Cu(II) was observed through adsorption or precipitation depending on pH. As(V) adsorption onto ICS occurred through an anionic-type and followed a Langmuir-type adsorption behaviour. In column experiments, pH was identified as an important parameter in the breakthrough of As(V). As(V) breakthrough at pH 4.5 was much slower than at pH 9 due to a strong chemical bonding between As(V) and ICS as similar with batch adsorption behaviour. With variation of ICS amounts, the optimum amount of ICS at pH 4.5 was identified as 5.0 grams in this research. At this condition, ICS could be used to treat 200 mg of As(V) with 1 kg of ICS until 50 ppb of As(V) appeared in the effluent. In this research, as a new treatment system, ICS can be potentially used to treat As(V) and cationic heavy metals.

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