The Removal of Arsenic Ion in Electro-Coagulation Cell

Ji, Sangwoo; Dempsey, Brian A.; Yoo, Kyoungkeun

doi:10.1080/12269328.2011.10541333

Cited by 8 publications

(5 citation statements)

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“…This means that the collector structures can influence water recovery (Cho and Laskowski, 2002;Grau et al, 2005;Gupta et al, 2007;Wang et al, 2020). The world's population enhancement is led to industrial production increases, which makes plenty amount of industrial wastewater (Krishnan et al, 2010;Ji et al, 2011;Anoop Krishnan et al, 2015;Jang et al, 2017). Sebba in 1962 for the first time introduced "ion flotation" as a process for separation (Sebba, 1962).…”

Section: Introductionmentioning

confidence: 99%

The effect of water recovery on the ion flotation process efficiency

Hoseinian¹,

Rezai²,

Kowsari³

et al. 2020

Physicochem. Probl. Miner. Process.

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The present study deals with nickel ions removal from dilute aqueous solution by ion flotation with emphasizing the process efficiency. The effect of collector structure on ion flotation efficiency and water recovery was evaluated using anionic collectors of sodium dodecyl sulfate (SDS) and functionalized graphene oxide by 2,6-diaminopyridine (AFGO). The results showed that process efficiency enhanced with the increase in pH and reached to complete removal at pH of 9 and 9.7 for SDS and AFGO, respectively. The AFGO showed the multifunctional bindings for complex formations with nickel ions. A coordinate bond may be formed between nickel ions and AFGO at the pH of 9 which increased nickel ion removal. The water recovery as a critical parameter that contributes to removal efficiency was significantly affected by the collector structure. The AFGO doesn't have a frothing property and so decreases the water recovery during the process. The AFGO had significantly lower water recovery than SDS (almost threefold).

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Section: Introductionmentioning

confidence: 99%

The effect of water recovery on the ion flotation process efficiency

Hoseinian¹,

Rezai²,

Kowsari³

et al. 2020

Physicochem. Probl. Miner. Process.

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“…While this investigation did not address the potential effect of untreated water pH on system performance, other studies have specifically examined the impact of pH on the removal of arsenic by HFO particles in similar systems 12,13 . These investigations have reported that arsenic adsorption onto HFO particles is fairly independent of pH up to a pH of 8.…”

Section: Practical Operating Considerationsmentioning

confidence: 99%

“…A stoichiometric reaction equation describing the production of HFO particles in EC systems has been presented by Ji, et al 13 and is shown below as Equation (1).…”

Section: Practical Operating Considerationsmentioning

confidence: 99%

“…Arsenic removal from groundwater using an electrocoagulation (EC)-based process technology has been recently demonstrated as a viable approach to potable water production as it appears to provide effective treatment over a wide range of conditions while minimizing many of the limitations and water chemistry-based site-specific issues associated with other technologies 10,11 . The EC technology has been shown capable of providing treatment either at laboratory scale 12,13 or in small communal systems 14 . The goal of this project was to design and operationally evaluate a small point-of-use arsenic removal system providing arsenic removal based on EC technology.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of a Point-of-Use Electrocoagulation System for Arsenic Removal

Casares

Chiesa

2016

IJSLE

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-A point-of-use prototype electrocoagulation treatment system was designed and evaluated for its ability to remove arsenic from a synthetic groundwater. The system was comprised of an electrocoagulation reactor providing batch treatment, a rechargeable battery power source, an electrical monitoring and control module, and a granular media filter. The control module and the filter underdrain system were designed to improve user convenience. The system was able to consistently reduce arsenic concentrations to below 20 µg/L. Effluent soluble arsenic concentrations under 10 µg/L were deemed possible with enhanced effluent suspended solids removal techniques. Arsenic removal was found to be a function of the initial arsenic concentration and the cumulative charge dosage as measured in coulombs per liter of water treated. The steel plate size used in the electrocoagulation module influenced the current draw and the overall electrical efficiency of the system. The monitoring and control module allowed the system to produce up to 100 liters of treated water daily on a single battery charge and would automatically control charge and iron dosage. The point-of-use system was capable of meeting household potable demands for water where other treatment options are limited.

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“…Arsenic has been recognized as a well-known toxic element, and even at low concentrations, long-term exposure to arsenic could lead to kinds of diseases such as skin tumors, liver dysfunction, gangrene and hearing defect (Ji et al, 2011;Ma and Bruckard, 2009;Yang et al, 2007). Environmental Protection Agency (USEPA) has lowered the current maximum contaminant level (MCL) of arsenic in drinking water from 50 ppb to 10 ppb in 2006 (Yang et al, 2007), and, in Korea, MCL of arsenic in soil is 6 mg/kg.…”

mentioning

confidence: 99%