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Enhanced adsorption of Cd(II) from aqueous solution by a magnesium oxide-rice husk biochar composite.
Environ Sci Pollut Res Int. 2018 May; 25(14):14032-14042.ES

Abstract

In this study, a magnesium oxide-rice husk biochar composite (MgO-BCR) was successfully prepared by a MgO impregnation method, and its adsorption performance was investigated in Cd(II) aqueous solution. A pseudo-second-order kinetic model described the Cd(II) adsorption behaviour on BCR and MgO-BCR well, while a Langmuir adsorption isotherm was more suitable for Cd(II) adsorption on the adsorbent. The fitting results of the monolayer model indicated that the number of ions captured by per site varied between 0.97 and 1.09. The calculated thermodynamic parameters indicated that Cd(II) adsorption onto MgO-BCR was spontaneous and endothermic. Characterisation of the adsorbent revealed that in situ precipitation, surface complexation, and electrostatic attraction contributed to the Cd(II) adsorption. The adsorption capacities of rice husk biochar (BCR) and MgO-BCR for Cd(II) reached 6.36 and 18.1 mg/g, respectively. The results demonstrated that MgO-BCR composite could be used as an effective and eco-friendly adsorbent to enhance the removal of Cd(II) from aqueous solution.

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Authors+Show Affiliations

Xiang J
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
Lin Q
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China. qintlin@163.com. Shanwei Jinruifeng Ecological Agriculture Co. LTD, Shanwei, 516400, People's Republic of China. qintlin@163.com.
Cheng S
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
Guo J
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
Yao X
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
Liu Q
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
Yin G
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
Liu D
Shanwei Jinruifeng Ecological Agriculture Co. LTD, Shanwei, 516400, People's Republic of China.

MeSH

AdsorptionCadmiumCharcoalKineticsMagnesium OxideModels, ChemicalOryzaThermodynamicsWaste Disposal, FluidWater Pollutants, Chemical

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29520542

Citation

Xiang, Jiangxin, et al. "Enhanced Adsorption of Cd(II) From Aqueous Solution By a Magnesium Oxide-rice Husk Biochar Composite." Environmental Science and Pollution Research International, vol. 25, no. 14, 2018, pp. 14032-14042.
Xiang J, Lin Q, Cheng S, et al. Enhanced adsorption of Cd(II) from aqueous solution by a magnesium oxide-rice husk biochar composite. Environ Sci Pollut Res Int. 2018;25(14):14032-14042.
Xiang, J., Lin, Q., Cheng, S., Guo, J., Yao, X., Liu, Q., Yin, G., & Liu, D. (2018). Enhanced adsorption of Cd(II) from aqueous solution by a magnesium oxide-rice husk biochar composite. Environmental Science and Pollution Research International, 25(14), 14032-14042. https://doi.org/10.1007/s11356-018-1594-1
Xiang J, et al. Enhanced Adsorption of Cd(II) From Aqueous Solution By a Magnesium Oxide-rice Husk Biochar Composite. Environ Sci Pollut Res Int. 2018;25(14):14032-14042. PubMed PMID: 29520542.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced adsorption of Cd(II) from aqueous solution by a magnesium oxide-rice husk biochar composite. AU - Xiang,Jiangxin, AU - Lin,Qintie, AU - Cheng,Shuailong, AU - Guo,Jianlong, AU - Yao,Xiaosheng, AU - Liu,Qianjun, AU - Yin,Guangcai, AU - Liu,Dingfa, Y1 - 2018/03/08/ PY - 2017/12/13/received PY - 2018/02/18/accepted PY - 2018/3/10/pubmed PY - 2018/12/12/medline PY - 2018/3/10/entrez KW - Adsorption mechanisms KW - Cadmium KW - MgO–biochar KW - Rice husk SP - 14032 EP - 14042 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 25 IS - 14 N2 - In this study, a magnesium oxide-rice husk biochar composite (MgO-BCR) was successfully prepared by a MgO impregnation method, and its adsorption performance was investigated in Cd(II) aqueous solution. A pseudo-second-order kinetic model described the Cd(II) adsorption behaviour on BCR and MgO-BCR well, while a Langmuir adsorption isotherm was more suitable for Cd(II) adsorption on the adsorbent. The fitting results of the monolayer model indicated that the number of ions captured by per site varied between 0.97 and 1.09. The calculated thermodynamic parameters indicated that Cd(II) adsorption onto MgO-BCR was spontaneous and endothermic. Characterisation of the adsorbent revealed that in situ precipitation, surface complexation, and electrostatic attraction contributed to the Cd(II) adsorption. The adsorption capacities of rice husk biochar (BCR) and MgO-BCR for Cd(II) reached 6.36 and 18.1 mg/g, respectively. The results demonstrated that MgO-BCR composite could be used as an effective and eco-friendly adsorbent to enhance the removal of Cd(II) from aqueous solution. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/29520542/Enhanced_adsorption_of_Cd_II__from_aqueous_solution_by_a_magnesium_oxide_rice_husk_biochar_composite_ DB - PRIME DP - Unbound Medicine ER -