Kinetic and isotherm studies on perchlorate sorption by ion-exchange resins in drinking water treatment

Darracq, Guillaume; Baron, J.; Joyeux, Marc

doi:10.1016/j.jwpe.2014.06.002

Cited by 45 publications

(24 citation statements)

References 16 publications

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“…Based on the Weber-Morris kinetic model, the values of k i at different metal concentrations are shown in Table 2 along with their determination coefficients values. The observed multi-linearity in the shape of the intraparticle diffusion plots has also been confirmed by other authors [38,39]. The results indicate that the intraparticle diffusion rate decreased from 0.48 to 0.0026; from 0.93 to 0.0029 and from 1.19 to 0.0032 with increase of the initial concentration from 5 to 20 mg/dm 3 , respectively.…”

Section: Removal Studies Using Batch Methods -Kineticssupporting

confidence: 87%

Chlorates(VII) removal on Dowex™PSR-2 resin

Kołodyńska

Łyko²,

Gęca³

et al. 2016

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Lately there has been observed the increased presence of chlorates(VII) in the natural environment which can affect human health negatively. Therefore the removal of chlorate(VII) ions using the gel type resin functionalized with the tri-n-butyl ammonium (Dowex™PSR-2) from waters was studied. The main aim was to evaluate the effects of experimental conditions including contact time, initial solution concentration, pH and temperature on chlorate(VII) ions removal as well as the anion exchanger properties on chlorate(VII) ions sorption. It was found that only the pseudo second order model described the experimental data well and the intraparticle diffusion was not the rate-limiting step. According to the Freundlich model, the qe value was to be 69.26 mg/g at optimum conditions (pH 7.0 at 25 oC).

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Section: Removal Studies Using Batch Methods -Kineticssupporting

confidence: 87%

Chlorates(VII) removal on Dowex™PSR-2 resin

Kołodyńska

Łyko²,

Gęca³

et al. 2016

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“…The equivalent aqueous nitrate concentrations from the vadose zone soil and surface water were 21 and 0.45 mg N/L, respectively (Table ). One of the primary sources of perchlorate contamination is the release of ammonium perchlorate, which dissociates completely in water into ammonium and perchlorate ions (Urbansky ; Darracq et al ). Then, due to further oxidation (e.g., natural nitrification processes), the ammonium is converted to nitrate and becomes a competing electron acceptor at many remediation sites.…”

Section: Resultsmentioning

confidence: 99%

“…Because perchlorate mitigation is so challenging, diverse technologies have been developed and tested for their efficacy in treating surface water and groundwater. Physical/chemical technologies include ion exchange (Ye et al ; Darracq et al ), membrane filtration (Srinivasan and Sorial ), adsorption with granular activated carbon, and chemical and electrochemical reduction (Rusanova et al ; Wang et al ). However, biological reduction is one of the most cost‐effective remediation options for perchlorate‐contaminated soil and water (Coates and Achenbach ; ITRC ).…”

Section: Introductionmentioning

confidence: 99%

Biological Reduction of Nitrate and Perchlorate in Soil Microcosms: An Electron Donor Comparison of Glycerol, Emulsified Oil, and Mulch Extract

Sarria¹,

Gonzales²,

Gerrity³

et al. 2018

Groundwater Monitoring Rem

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Diverse technologies have been developed and tested for their efficacy in remediating perchlorate‐contaminated surface water, groundwater, and soil. Biological reduction, particularly when coupled with electron donor augmentation, has been shown to be one of the most cost‐effective alternatives. Numerous electron donors have been evaluated in the literature, but few studies have compared standard vs. slow‐release electron donors for sequential nitrate and perchlorate reduction. This study evaluated the efficacy and kinetics of biological reduction in soil microcosms augmented with emulsified oil (EO), glycerol, and mulch extract. Results indicated that EO and glycerol spiked at approximately 100 times stoichiometric excess (i.e., 100x) achieved similar overall reductions and degradation rates for nitrate and perchlorate, although nitrate appeared to exhibit zero order kinetics while perchlorate exhibited first order kinetics. The zero order rate constants for nitrate reduction were 3.32 mg/L d and 2.57 mg/L d for EO and glycerol, respectively. The first order rate constant for perchlorate reduction was 0.36 day−1 for both EO and glycerol. Stable chemical oxygen demand (COD) concentrations also highlighted the slow‐release properties of EO, which would reduce electron donor consumption in comparison to soluble substrates in soil remediation applications. The microcosms augmented with mulch extract failed to demonstrate any nitrate or perchlorate reduction due to the extract's lower COD concentration. Augmentation with compost or additional processing (i.e., concentration) would be necessary to make the extract a viable alternative.

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“…Eventually, the resin reaches an equilibrium concentration, where it is saturated with ions, and then the resin requires regeneration. In water treatment, ion-exchange resins are the most sensible method for removing perchlorate at levels <50 µg/kg (Darracq, Baron, & Joyeux, 2014). However, ion exchange is not found to be economically viable due to the high cost associated with it and the disposal of brine solutions (Ye, You, Yao, & Su, 2012).…”

Section: Oxychlorine Removalmentioning

confidence: 99%

Chlorate and Other Oxychlorine Contaminants Within the Dairy Supply Chain

McCarthy

O’Callaghan

Danahar

et al. 2018

Comp Rev Food Sci Food Safe

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The presence of chlorate in milk and dairy products can arise from the use of chlorinated water and chlorinated detergents for cleaning and sanitation of process equipment at both farm and food processor level. Chlorate and other oxychlorine species have been associated with inhibition of iodine uptake in humans and the formation of methemoglobin, with infants and young children being a high‐risk demographic. This comprehensive review of chlorate and chlorine derivatives in dairy, highlights areas of concern relative to the origin and/or introduction of chlorate within the dairy supply chain. This review also discusses the associated health concerns, regulations, and chemical behavior of chlorate and chlorine‐derived by‐products, and provides a summary of mechanisms for their detection and removal.

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Kinetic and isotherm studies on perchlorate sorption by ion-exchange resins in drinking water treatment

Cited by 45 publications

References 16 publications

Chlorates(VII) removal on Dowex™PSR-2 resin

Chlorates(VII) removal on Dowex™PSR-2 resin

Biological Reduction of Nitrate and Perchlorate in Soil Microcosms: An Electron Donor Comparison of Glycerol, Emulsified Oil, and Mulch Extract

Chlorate and Other Oxychlorine Contaminants Within the Dairy Supply Chain

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