Speciation of chromium compounds from humic acid-zeolite Y to an ionic liquid during extraction

Huang, Hsin-Liang; Wei, Yu Jhe

doi:10.1016/j.chemosphere.2017.11.160

Cited by 15 publications

(2 citation statements)

References 30 publications

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“…Calcium oxide and, partly, zeolite also decreased the Cu and Ni content of soil. The results of this study and other authors’ findings indicate that zeolites effectively remove heavy metals, including Cr, from soil due to their high porosity and sorptive capacity (Antoniadis et al 2018; Feng et al 2018; Huang and Wei 2018). Eyvazi et al (2019) found that nano-magnetic MnFe 2 O 4 significantly enhanced the immobilization of Cr(VI) by decreasing leachability, plant bioavailability, human bioaccessibility, and risk of release.…”

Section: Discussionsupporting

confidence: 65%

The applicability of compost, zeolite and calcium oxide in assisted remediation of acidic soil contaminated with Cr(III) and Cr(VI)

Radziemska

Wyszkowski

Bęś

et al. 2019

Environ Sci Pollut Res

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The effect of soil amendments, i.e., compost, zeolite, and calcium oxide, on the chemical properties of soil contaminated with Cr(III) and Cr(VI) and the uptake of selected heavy metals by spring barley ( Hordeum vulgare L.) and maize ( Zea mays L.) was determined in a pot experiment. The content of all investigated heavy metals in the tested plants varied significantly in response to the tested soil amendments and increasing concentrations of Cr(III) and Cr(VI). Compost, zeolite, and calcium oxide contributed to an increase in the average yield of the aerial parts of maize plants only in treatments contaminated with Cr(III). The concentrations of Cr, Zn, and Ni in the aerial parts of spring barley and maize were higher in treatments contaminated with Cr(III) than in treatments contaminated with Cr(VI). Calcium oxide induced a significant increase in soil pH relative to the control treatment. In treatments without soil amendments, the average Cr content of soil was higher in pots contaminated with Cr(VI). The concentrations of Zn and Cu in non-amended treatments were negatively correlated with increasing doses of Cr(III) and Cr(VI). Calcium oxide decreased the average content of Cr, Cu, and Ni in all experimental variants. Compost increased the average content of Zn in treatments contaminated with Cr(III) and Cr(IV) relative to non-amended soil.

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Section: Discussionsupporting

confidence: 65%

The applicability of compost, zeolite and calcium oxide in assisted remediation of acidic soil contaminated with Cr(III) and Cr(VI)

Radziemska

Wyszkowski

Bęś

et al. 2019

Environ Sci Pollut Res

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“…This procedure results in the formation of a cloudy solution, in which fine droplets of the extractant solvent are dispersed in the sample, and thus helps to carry out both extraction and pre-concentration within a rapid single step. The speciation of Cr(VI)/ Cr(III) adsorbed on humic acid (HA)-microporous zeolite Y and extracted in an ionic liquid (1-butyl-3methylimidazolium tetrafluoroborate has been studied by Huang and Wei [25]. Although many researchers have examined the effectiveness of modified zeolites for the adsorption of Cr(VI), this is the first study reporting on the hexavalent Cr(VI) removal using the modified Bigadic clinoptilolite, and related parameters on the adsorption process have been described in detail.…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Hexavalent Chromium in Aqueous Solution by Cationic Surfactant-Treated Natural Anatolian Clinoptilolite

Yalçın¹,

Demirkol²,

Elnekave³

et al. 2022

Pol. J. Environ. Stud.

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Sodium clinoptilolite-rich tuff from the Western Anatolia, Bigadic region was modified with octadecyltrimethylammonium bromide(ODTMA-Br) and hexadecyltrimethylammonium bromide (HDTMA-Br), and used for the first time to remove chromium(VI) from aqueous solution in a series of batch adsorption experiments. Various physico-chemical parameters affecting the adsorption process such as the contact time, pH, the optimum sorbent dosage and the initial concentration of chromium were studied. The Cr(VI) adsorption capacity of ODTMA-and HDTMA-treated clinoptilolite (Cp) was highly pH-dependent, and was found to be 3.65 mg/g and 2.85 mg/g at pH 2.0 and 3.0, and 0.25 g/50 mL sorbent dosage, 3 h equilibrium time and 25ºC, respectively. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models were applied to describe the adsorption isotherms. Langmuir's model fitted the equilibrium data better than the Freundlich isotherm. From the D-R isotherm model, the mean adsorption energy (E) calculated as 15.075 and 14.744 kJ/mol for ODTMA-Cp and HDTMA-Cp sorbents showed that the adsorption of chromium occurred by chemisorption. The kinetic data indicated that the sorption of hexavalent chromium onto modified Cp followed well the pseudo-first-order kinetics. The current study considers that further developments in this line of research should continue

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Speciation of Chromium Compounds from Zsm-5 into an Ionic Liquid

Huang

Wei

2021

J Appl Spectrosc

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Speciation of chromium compounds from humic acid-zeolite Y to an ionic liquid during extraction

Cited by 15 publications

References 30 publications

The applicability of compost, zeolite and calcium oxide in assisted remediation of acidic soil contaminated with Cr(III) and Cr(VI)

The applicability of compost, zeolite and calcium oxide in assisted remediation of acidic soil contaminated with Cr(III) and Cr(VI)

Efficient Removal of Hexavalent Chromium in Aqueous Solution by Cationic Surfactant-Treated Natural Anatolian Clinoptilolite

Speciation of Chromium Compounds from Zsm-5 into an Ionic Liquid

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