Selective, highly efficient extraction of Cr(III), Pb(II) and Fe(III) from complex water environment with a tea residue derived porous gel adsorbent

Zhang, Shuaizhong; Liu, Chengzhen; Yuan, Yongkai; Fan, Minghao; Zhang, Dandan; Wang, Dongfeng; Xu, Ying

doi:10.1016/j.biortech.2020.123520

Cited by 65 publications

(9 citation statements)

References 49 publications

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“…However, most of the previous studies have focused on the removal of single-class heavy metal ions and dyes, which limits their practical utility because it is impossible to have only one type of pollutant due to the complex composition of wastewater. It is worth noting that heavy metal ions can be selectively recovered from complex wastewater as a valuable resource, providing huge economic incentives for pollution control (Saeed et al 2020;Zhang et al 2020). In recent years, research on industrial wastewater treatment has focused on the synthesis of functional adsorbents because of their environmental, low cost and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Polyacrylic acid/carboxymethyl cellulose/activated carbon composite hydrogel for removal of heavy metal ion and cationic dye

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Polyacrylic acid/carboxymethyl cellulose/activated carbon composite hydrogel for removal of heavy metal ion and cationic dye

et al. 2021

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“…Based on the Langmuir model, the dimensionless R L equilibrium parameter, also known as separation coefficient, was calculated. The R L was between 0 and 1 (Figure S5), indicating that the adsorption process is favorable 30 …”

Section: Resultsmentioning

confidence: 99%

High‐efficiency adsorption of various heavy metals by tea residue biochar loaded with nanoscale zero‐valent iron

Liu

Zhang

Fan

et al. 2021

Env Prog and Sustain Energy

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Nanoscale zero‐valent iron (nZVI) loaded on tea residue biochar activated with phosphoric acid composites was synthesized. This adsorbent can efficiently adsorb multiple heavy metal ions such as Pb (II), Cr (III), Cu (II), and Ni (II) simultaneously. The adsorption process was found to follow the pseudo‐second‐order kinetic model. Equilibrium adsorption capacities reached 288.18, 162.34, 242.72, and 267.22 mg·g−1 for Pb(II), Cr(III), Cu(II), and Ni(II), respectively. The common interfering ions exhibited lower influence on its adsorption capacity. The adsorption mechanism includes reduction, ion exchange, surface complexation and precipitation. Furthermore, the waste adsorbent was converted into a catalyst in situ, which could catalyze the degradation of Congo red by establishing an electron transfer pathway. This research provides a new concept for the sustainable utilization of industrial tea residues and the harmless treatment of waste nZVI composite adsorbents.

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“…Though the desorption process of Fe(III) from zeolites and bentonites was not part of this study, it could be realized with diethylenetriaminepentaacetic acid [39], 0.5 mol.l −1 HNO 3 [40], Na 2 -EDTA [41], HCl and EDTA [42], thermally [43] etc. The desorption may be a part of further study.…”

Section: Discussionmentioning

confidence: 99%

Characterization of Fe(III) Adsorption onto Zeolite and Bentonite

Bakalár

Kaňuchová

Girová

et al. 2020

IJERPH

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In this study, the adsorption of Fe(III) from aqueous solution on zeolite and bentonite was investigated by combining batch adsorption technique, Atomic adsorption spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy analyses. Although iron is commonly found in water and is an essential bioelement, many industrial processes require efficient removal of iron from water. Two types of zeolite and two types of bentonite were used. The results showed that the maximum adsorption capacities for removal of Fe (III) by Zeolite Micro 20, Zeolite Micro 50, blue bentonite, and brown bentonite were 10.19, 9.73, 11.64, and 16.65 mg.g−1, respectively. Based on the X-ray photoelectron spectroscopy (XPS) and X-ray fluorescence (XRF) analyses of the raw samples and the solid residues after sorption at low and high initial Fe concentrations, the Fe content is different in the surface layer and in the bulk of the material. In the case of lower initial Fe concentration (200 mg.dm−3), more than 95% of Fe is adsorbed in the surface layer. In the case of higher initial Fe concentration (4000 mg.dm−3), only about 45% and 61% of Fe is adsorbent in the surface layer of zeolite and bentonite, respectively; the rest is adsorbed in deeper layers.

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Selective, highly efficient extraction of Cr(III), Pb(II) and Fe(III) from complex water environment with a tea residue derived porous gel adsorbent

Cited by 65 publications

References 49 publications

Polyacrylic acid/carboxymethyl cellulose/activated carbon composite hydrogel for removal of heavy metal ion and cationic dye

Polyacrylic acid/carboxymethyl cellulose/activated carbon composite hydrogel for removal of heavy metal ion and cationic dye

High‐efficiency adsorption of various heavy metals by tea residue biochar loaded with nanoscale zero‐valent iron

Characterization of Fe(III) Adsorption onto Zeolite and Bentonite

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