Efficient scavenging of aqueous Pb(II)/Cd(II) by sulfide-iron decorated biochar: Performance, mechanisms and reusability exploration

Cao, Bo; Qu, Jianhua; Yuan, Yihang; Zhang, Weihang; Miao, Xuemei; Zhang, Xinru; Xu, Yuan; Han, Tianyi; Song, Haijiao; Ma, Shouyi; Tian, Xue; Zhang, Ying

doi:10.1016/j.jece.2022.107531

Cited by 28 publications

(4 citation statements)

References 62 publications

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“…In view of the fact that traditional explanations of the adsorption mechanisms based on explicit correlation analysis, mainly through experimental tests, characterizations and classical models, are not comprehensive [27][28][29][30]. Meanwhile, the environmental impact of the aerogel preparation process has been much more rarely studied.…”

Section: Introductionmentioning

confidence: 99%

Highly-efficient removal of Pb (II) from water by mesoporous amino functionalized silica aerogels: Experimental, DFT investigations and Life Cycle Assessment

Zhang

Magagnin

Yuan

et al. 2022

Microporous and Mesoporous Materials

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Section: Introductionmentioning

confidence: 99%

Highly-efficient removal of Pb (II) from water by mesoporous amino functionalized silica aerogels: Experimental, DFT investigations and Life Cycle Assessment

Zhang

Magagnin

Yuan

et al. 2022

Microporous and Mesoporous Materials

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“…Cao et al suggested that a large number of alkaline cations were released during the adsorption of heavy metals from biochar, leaving the adsorption sites on the surface of biochar vacant, and heavy metal ions exchanged with the released cations and adsorbed on the vacant sites [30] . The Oxygenated functional groups (for example -OH and -COOH) on the biochar surface can chelate with heavy metal ions to achieve adsorption purposes and immobilization of heavy metals.…”

Section: Discussion Of Adsorption Mechanismsmentioning

confidence: 99%

Removal of Cd2+ from aqueous solution using graphene oxide modified activate carbon derived from peanut shell

Du,

Wang,

et al. 2023

International Journal of Agricultural and Biological Engineering

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Graphene oxide (GO) was prepared by a modified Hummers method using peanut shells and natural graphite, and graphene oxide modified peanut shells activated carbon composites (GO-AC) were synthesized by co-pyrolysis. The optimal preparation conditions of AC were screened by response surface methodology (RSM) to optimize the preparation process. The results showed that the surface of GO-AC had more micropores and larger specific surface area, increased the surface adsorption sites and had more oxygen-containing functional groups. The adsorption process was mainly based on chemisorption, and the adsorption capacity was 3.45 and 1.30 times higher than that of BC (45.16 mg/g) and AC (119.21 mg/g), respectively. After six adsorption-desorption cycle tests, the adsorption amount of Cd 2+ by GO-AC was still as high as 89.26 mg/g, with a percentage increase of 93.5% and 365% compared to BC (19.18 mg/g) and AC (46.13 mg/g), respectively, with good reusability. The research can provide a useful reference for the high value-added conversion of waste biomass, and GO-AC loading modified with significant adsorption of Cd 2+ has good potential for application as a novel and low-cost adsorbent.

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“…In the binary competitive adsorption system, the affinity of ATP-SH-0.5 for Pb (II) was greater than that for Cd (II), indicating that ATP-SH-0.5 had a greater advantage in adsorbing Pb (II). Table 5 shows the results of adsorption of Cd (II) and Pb (II) on different sulfhydryl functionalized materials at 298 K. The theoretical adsorption capacity of ATP-SH-0.5 was significantly enhanced compared to mercapto-functionalized unpurified attapulgite [32] at 298 K. Compared to mercapto-functionalized other clay minerals, ATP-SH-0.5 demonstrated good adsorption efficiency for Cd (II) and superior adsorption efficiency for Pb (II) [12,16,[32][33][34][35].…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…Pb (II) was greater than that for Cd (II), indicating that ATP-SH-0.5 had a greater advantage in adsorbing Pb (II). Table 5 shows the results of adsorption of Cd (II) and Pb (II) on different sulfhydryl functionalized materials at 298 K. The theoretical adsorption capacity of ATP-SH-0.5 was significantly enhanced compared to mercapto-functionalized unpurified attapulgite [32] at 298 K. Compared to mercapto-functionalized other clay minerals, ATP-SH-0.5 demonstrated good adsorption efficiency for Cd (II) and superior adsorption efficiency for Pb (II) [12,16,[33][34][35]. Four adsorption isotherm models, namely Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich (D-R) models [36], were employed to interpret the adsorption behavior of Cd (II) and Pb (II) on ATP-SH-0.5.…”

Section: Adsorption Isothermmentioning

confidence: 99%

Preparation and Characterization of Mercapto-Functionalized Calcined Attapulgite and Its Removal of Pb (II) and Cd (II) Solution

Zhang,

Wang,

Luo

et al. 2023

Minerals

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To enhance the sorption efficacy of attapulgite for heavy metals, mercapto-functionalized attapulgite (ATP-SH) was synthesized with mercaptan functional groups. When the mass-to-volume ratio of calcined attapulgite (ATP-C) to 3-Mercapropyltrimethoxysilane (MPTMS) was 1 g:0.5 mL (ATP-SH-0.5) and the pH was set to 8, a strong adsorption capacity for Cd (II) and Pb (II) was demonstrated. This indicates excellent adsorption performance for these heavy metals. ATP-SH-0.5 exhibited a maximum adsorption capacity of 43.81 mg/g and 274.83 mg/g for Cd (II) and Pb (II), respectively, in a single ion system. In a binary ion system, the maximum adsorption capacity was 31.86 mg/L and 254.45 mg/L for Cd (II) and Pb (II), respectively. Various characterizations and experiments showed that the adsorption of Cd (II) and Pb (II) onto ATP-SH-0.5 involves ion exchange reactions involving hydroxyl and thiol functional group complexation reactions. This adsorption process follows a single-molecule layer adsorption mechanism. XPS results indicate that hydroxyl and grafted thiol functional groups on the surface of mercapto-functionalized attapulgite participated in surface complexation reactions with Cd (II) and Pb (II), resulting in the formation of Cd-S and Pb-S species. Overall, this study provides a promising mercapto-functionalized modification material for the remediation of polluted water and soil.

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Efficient scavenging of aqueous Pb(II)/Cd(II) by sulfide-iron decorated biochar: Performance, mechanisms and reusability exploration

Cited by 28 publications

References 62 publications

Highly-efficient removal of Pb (II) from water by mesoporous amino functionalized silica aerogels: Experimental, DFT investigations and Life Cycle Assessment

Highly-efficient removal of Pb (II) from water by mesoporous amino functionalized silica aerogels: Experimental, DFT investigations and Life Cycle Assessment

Removal of Cd2+ from aqueous solution using graphene oxide modified activate carbon derived from peanut shell

Preparation and Characterization of Mercapto-Functionalized Calcined Attapulgite and Its Removal of Pb (II) and Cd (II) Solution

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