Capacitive deionization of arsenic-contaminated groundwater in a single-pass mode

Fan, Chen-Shiuan; Liou, Yi-Rou; Hou, Chia‐Hung

doi:10.1016/j.chemosphere.2017.06.068

Cited by 70 publications

(25 citation statements)

References 38 publications

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“…Above observations imply that a preferential electrosorption sequence of the competitive anions was: Cl SO P, while their initial ion concentration in the synthetic feed solution were Cl 1.90 mM P 0.40 mM SO 0.32 mM . The fastest Cl removal among all the co-existing anions at stage of adsorption is mainly because it has the highest initial concentration amongst all the anions present in the synthetic wastewater (Fan et al, 2017). Similar to the results shown in Fig.…”

Section: Phosphate Equilibrium System Studysupporting

confidence: 85%

“…Generally, the ion selectivity and degree of ion electrosorption capacity mainly depend on the hydrated size, ionic charge, ion concentration, and degree of ion complexation (Hou and Huang, 2013). Fan, Liou & Hou (2017) investigated preferential adsorption sequence of co-existing ions in single-pass-mode (SP-mode) CDI. And they observed that the co-existence of other ions can significantly affect the phosphate removal from the wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…They conducted their studies in a mixed environment covering different ionic charge and non-equal ion concentration (Fan et al, 2017). In another work, analysed pHdependent ion selectivity between P and Cl in SP-mode membrane CDI (MCDI) with equivalent ionic strength.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phosphorus removal mechanisms from domestic wastewater by membrane capacitive deionization and system optimization for enhanced phosphate removal

Jiang

Kim

Dorji

et al. 2019

Process Safety and Environmental Protection

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Membrane capacitive deionization (MCDI) is an emerging technology for effective removal of charged pollutants from the water sources including domestic wastewater. In this work, a lab-scale MCDI system was employed to investigate its feasibility for effective phosphorus removal from domestic wastewater. The effect of phosphate equilibrium reactions on the ion sorption behaviour was studied in sodium phosphate buffer solution at typical pH range maintained in a real domestic raw wastewater effluent (between 6.5 and 8.5). The results demonstrated that phosphate equilibrium system has positive impact on the degree of inorganic phosphorus (P) adsorption capacity in aqueous solution. In addition, the ion selectivity of P over other co-existing anions (Cl ,SO ) were experimentally studied using a synthetic wastewater solution. And it was found that the preferential electrosorption sequence of the competitive anions is: Cl SO P, while the initial ion concentration order in the synthetic feed solution is: Cl 1.90 mM P 0.40 mM SO 0.32 mM .The experiments with diverse operating conditions revealed that the optimal adsorption of inorganic phosphorus over chloride and sulphate can be achieved in some extent with slower flow rates and higher applied potentials (less than 1.23 V).

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Section: Phosphate Equilibrium System Studysupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phosphorus removal mechanisms from domestic wastewater by membrane capacitive deionization and system optimization for enhanced phosphate removal

Jiang

Kim

Dorji

et al. 2019

Process Safety and Environmental Protection

View full text Add to dashboard Cite

show abstract

“…However, at higher TDS, the high concentration of chloride ions severely impedes the adsorption of bromide ions, which further confirms that under mixed ionic environment, the ions with the highest concentration have more selectivity for adsorption [41,42]. In practical application, however, the 1 st pass SWRO permeate contains multiple ions with different ionic properties.…”

Section: Influence Of Bromide Concentration and The Feed Water Tdsmentioning

confidence: 60%

Membrane capacitive deionisation as an alternative to the 2nd pass for seawater reverse osmosis desalination plant for bromide removal

et al. 2018

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Most Australian surface and ground waters have relatively high concentration of bromide between 400-8,000 µg/L and even higher concentration in seawater between 60,000-78,000 µg/L. Although bromide is not regulated, even at low concentrations of 50-100 µg/L, it can lead to the formation of several types of harmful disinfection by-products (DBPs) during the disinfection process. One of the major concerns with brominated DBPs is the formation of bromate (BrO3-), a serious carcinogen that is formed when water containing a high 32 concentration of bromide is disinfected. As a result, bromate is highly regulated in Australian 33 water standards with the maximum concentration of 20 µg/L in the drinking water. Since 34 seawater reverse osmosis (SWRO) desalination plays an important role in augmenting fresh water supplies in Australia, SWRO plants in Australia usually adopt 2 nd pass brackish water reverse osmosis (BWRO) for effective bromide removal, which is not only energy-intensive to operate but also has higher capital cost. In this study, we evaluated the feasibility of membrane capacitive deionization (MCDI) as one of the alternatives to the 2 nd pass BWRO for effective bromide removal in a more energy efficient way.

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“…Qinghua et al [71] using pyridinic N-dominated graphene (N-6-G) and pyrrolic N-dominated graphene (N-5-G) were able to capture lead (Pb 2+ ) in aqueous solution, thus opening way for selective desalination in complex media. With the same approach, arsenic-contaminated groundwater in Taiwan was studied by Chen et al [72]. Carbon aerogels has been shown to remove various inorganic species from aqueous solutions by Christophe et al [73].…”

Section: Carbon-based Electrodes In Alternatives Applicationsmentioning

confidence: 99%

Towards Electrochemical Water Desalination Techniques: A Review on Capacitive Deionization, Membrane Capacitive Deionization and Flow Capacitive Deionization

et al. 2020

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Electrochemical water desalination has been a major research area since the 1960s with the development of capacitive deionization technique. For the latter, its modus operandi lies in temporary salt ion adsorption when a simple potential difference (1.0–1.4 V) of about 1.2 V is supplied to the system to temporarily create an electric field that drives the ions to their different polarized poles and subsequently desorb these solvated ions when potential is switched off. Capacitive deionization targets/extracts the solutes instead of the solvent and thus consumes less energy and is highly effective for brackish water. This paper reviews Capacitive Deionization (mechanism of operation, sustainability, optimization processes, and shortcomings) with extension to its counterparts (Membrane Capacitive Deionization and Flow Capacitive Deionization).

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Capacitive deionization of arsenic-contaminated groundwater in a single-pass mode

Cited by 70 publications

References 38 publications

Phosphorus removal mechanisms from domestic wastewater by membrane capacitive deionization and system optimization for enhanced phosphate removal

Phosphorus removal mechanisms from domestic wastewater by membrane capacitive deionization and system optimization for enhanced phosphate removal

Membrane capacitive deionisation as an alternative to the 2nd pass for seawater reverse osmosis desalination plant for bromide removal

Towards Electrochemical Water Desalination Techniques: A Review on Capacitive Deionization, Membrane Capacitive Deionization and Flow Capacitive Deionization

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