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Separation Science and Technology Volume 53, 2018 - Issue 10
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Original Articles

Application of biochar derived from rice straw for the removal of Th(IV) from aqueous solution

Lijia DongSchool of Life Sciences, College of Yuanpei, School of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang, P.R.ChinaCorrespondence[email protected]
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Kaikai ChangSchool of Life Sciences, College of Yuanpei, School of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang, P.R.ChinaView further author information
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Linxia WangSchool of Life Sciences, College of Yuanpei, School of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang, P.R.ChinaView further author information
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Wensheng LinghuSchool of Life Sciences, College of Yuanpei, School of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang, P.R.ChinaView further author information
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Donglin ZhaoSchool of Materials and Chemical Engineering, Anhui University of Architecture, Hefei, P.R.ChinaView further author information
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Abdullah M. AsiriChemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi ArabiaView further author information
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Khalid A. AlamryChemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi ArabiaView further author information
,
Ahmed AlsaediNAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi ArabiaView further author information
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Tasawar HayatNAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia;Department of Mathematics, Quaid-I-Azam University, Islamabad, PakistanView further author information
,
Xue LiSchool of Life Sciences, College of Yuanpei, School of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang, P.R.ChinaView further author information
&
Xilin WuCollege of Geography and Environmental Science, Zhejiang Normal University, Jinhua, ChinaView further author information
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Pages 1511-1521 | Received 20 Jul 2017, Accepted 27 Nov 2017, Published online: 26 Dec 2017
 
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ABSTRACT

Biochar is increasingly used as a low-cost and effective adsorbent for heavy metals in wastewater. Herein, biochar pyrolyzed from rice straw was employed as an adsorbent for the removal of Th(IV) from aqueous solutions. The sorption of Th(IV) on biochar was strongly dependent on pH, but independent on ionic strength at pH < 6.4. The inner-sphere complexation dominated the sorption mechanism of Th(IV) on biochar. The competition for Th(IV) between aqueous or surface-adsorbed cations/anions and functional groups of biochar was pivotal for Th(IV) sorption. The thermodynamic data suggested that Th(IV) sorption was a spontaneous and endothermic process.

Supplemental data

Supplemental data for this article can be accessed on the publisher’s website.

Additional information

Funding

Financial support from the National Natural Science Foundation of China (31700476) is greatly acknowledged.

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