Adsorption of perchlorate from aqueous solutions by anion exchange resins: Effects of resin properties and solution chemistry

Zhu, Yanping; Gao, Naiyun; Wang, Qiongfang; Wei, Xingya

doi:10.1016/j.colsurfa.2014.11.062

Cited by 40 publications

(14 citation statements)

References 41 publications

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“…Figure and Table S1 (in the Supporting Information) display the adsorption isotherms of MPD onto four resins (the temperatures were 288, 303, and 318 K) and the fitted parameters of the Langmuir, Freundlich, and Temkin isotherm equations, which can be written as follows:

q_{e} = \frac{q_{m} K_{L} C_{e}}{1 + k_{L} C_{e}}

q_{e} = K_{F} C_{e}^{1 / n}

q_{e} = B \ln A + B \ln C_{e}

…”

Section: Resultsmentioning

confidence: 99%

“…It is obvious that the correlation coefficients ( R 2 > 0.999) for the pseudo‐second‐order model are much higher than those of the pseudo‐first‐order model. A basic assumption for the pseudo‐second‐order model is that the rate‐limiting step is chemisorption, including covalent forces through sharing of electrons between adsorbent and adsorbate . In particular, SAMR has a higher rate constant K 2 than the other modified resins, indicative of a better adsorption speed.…”

Section: Resultsmentioning

confidence: 99%

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Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

Wang

Liu

et al. 2018

J of Applied Polymer Sci

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Four kinds of hypercrosslinked resins (acidic resins labeled SAMR and TAMR and heterocyclic resins IDLMR and PRLMR) were synthesized as adsorbents to remove m-phenylenediamine (MPD) from aqueous solution comparably. The Brunauer-Emmett-Teller specific surface area and pore size distribution of the two types of resins have been compared, and the infrared spectra of the resins confirm the presence of the modified groups. The adsorption isotherms illustrate that the Freundlich equation fits more appropriately than the Langmuir equation or the Temkin equation. In addition, the kinetic curves indicate that the pseudo-second-order model is a better fit than the pseudo-first-order model. The thermodynamic studies show that the isosteric adsorption enthalpy changes (ΔH) and the Gibbs free energy change (ΔG) are both negative, revealing that all of the adsorption processes are spontaneous and exothermic. All of the modified resins exhibit the best adsorption capacity at pH = 6.24. The results show that the acidic resins have better adsorption of MPD.

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q_{e} = \frac{q_{m} K_{L} C_{e}}{1 + k_{L} C_{e}}

q_{e} = K_{F} C_{e}^{1 / n}

q_{e} = B \ln A + B \ln C_{e}

…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

Wang

Liu

et al. 2018

J of Applied Polymer Sci

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“…MIEX resin was compared with two strong-base, polystyrene resins with biquaternary ammonium functional groups (i.e., triethylamine and trihexylamine). All three resins showed similar removal of perchlorate in the absence of competing anions; however, perchlorate removal by MIEX resin in the presence of sulfate was reduced from 87 to 31-49 %, whereas the presence of sulfate did not affect perchlorate removal by the other biquaternary ammonium resins [73]. This is because larger spaced quaternary ammonium functional groups, such as triethyl-and trihexylamine, are more selective for monovalent anions over divalent anions than closely spaced trimethylamine functional groups in MIEX resin [82].…”

Section: Comparison With Other Anion Exchange Resinsmentioning

confidence: 92%

“…MIEX resin has also been investigated for removal of other inorganic anions including sulfate [18,33], nitrate [26,33], phosphate [70,71], chromium(VI) [16], arsenic(V) [16], iodide [67••], and perchlorate [72,73], some of which may compete with DOM for exchange sites on MIEX resin. The extent of removal of inorganic chemicals depends on the initial chemical concentration, MIEX resin dose, and competing species.…”

Section: Removal Of Inorganic and Synthetic Organic Chemicals Inorganmentioning

confidence: 99%

Removal of Dissolved Organic Matter by Magnetic Ion Exchange Resin

Boyer

2015

Curr Pollution Rep

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This article provides a state-of-the-art review on the uses of magnetic ion exchange (MIEX) resin in drinking water and wastewater treatment, with emphasis on removal of dissolved organic matter (DOM) from drinking water and wastewater, regeneration efficiency, removal of inorganic and synthetic organic chemicals, comparison with other anion exchange resins, and integration with other physical-chemical processes. Through laboratory jar tests, pilot plant tests, and full-scale installations for a variety of drinking water sources, MIEX resin can achieve 30-80 % removal of dissolved organic carbon (DOC), which is often higher than alum or ferric coagulation. In addition, MIEX resin has been shown to remove hydrophilic, transphilic, and hydrophobic fractions of DOM and a wide range of molecular weight fractions of DOM. As a result, MIEX pretreatment results in substantial reductions in the formation of trihalomethanes and haloacetic acids upon chlorination. MIEX resin can achieve bromide removal in the range of 10-50 %, with higher bromide removal in waters with low DOC, low alkalinity, and low sulfate. However, there are commercially available anion exchange resins that are more selective for bromide than MIEX resin. MIEX resin has been investigated in combination with coagulation, activated carbon adsorption, membrane separation, lime softening, and ozonation. MIEX pretreatment has been shown to reduce downstream chemical requirements and improve the operation of downstream processes. This is most evident for coagulation and ozonation where the coagulant dose can be reduced by 50-75 % and the ozone concentration can be increased by 40-65 %. In general, MIEX pretreatment shows minor reductions in membrane fouling. Future research should continue to investigate the integration of MIEX treatment with other processes.

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“…For example, SLUG‐21 and UiO‐66‐NH 3 + Cl − require longer than 24 h to reach equilibrium . As clearly seen in Figures b and S7 (Supporting Information), the sorption kinetics of SCU‐102 is faster than that of state‐of‐the‐art anion‐exchange resins (Purolite A532E and A530E) that are particularly designed for removing hydrophobic ClO 4 − and TcO 4 − . The fast sorption rate is mostly attributed to the ordered 1D channels in the highly crystalline SCU‐102 that allow an efficient transportation of TcO 4 − .…”

Section: Figurementioning

confidence: 98%

Successful Decontamination of ⁹⁹TcO₄⁻ in Groundwater at Legacy Nuclear Sites by a Cationic Metal‐Organic Framework with Hydrophobic Pockets

et al. 2019

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Adsorption of perchlorate from aqueous solutions by anion exchange resins: Effects of resin properties and solution chemistry

Cited by 40 publications

References 41 publications

Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

Removal of Dissolved Organic Matter by Magnetic Ion Exchange Resin

Successful Decontamination of ⁹⁹TcO₄⁻ in Groundwater at Legacy Nuclear Sites by a Cationic Metal‐Organic Framework with Hydrophobic Pockets

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Adsorption of perchlorate from aqueous solutions by anion exchange resins: Effects of resin properties and solution chemistry

Cited by 40 publications

References 41 publications

Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

Comparative study of adsorption for m‐phenylenediamine in aqueous solution onto chemically modified resins

Removal of Dissolved Organic Matter by Magnetic Ion Exchange Resin

Successful Decontamination of 99TcO4− in Groundwater at Legacy Nuclear Sites by a Cationic Metal‐Organic Framework with Hydrophobic Pockets

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Product

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About

Successful Decontamination of ⁹⁹TcO₄⁻ in Groundwater at Legacy Nuclear Sites by a Cationic Metal‐Organic Framework with Hydrophobic Pockets