文献类型： 外文期刊

作者： Chen, Hanbo ¹ ; Gao, Yurong ¹ ; El-Naggar, Ali ³ ; Niazi, Nabeel Khan ⁴ ; Sun, Chenghua ⁵ ; Shaheen, Sabry M. ⁶ ; Hou, Deyi ⁹ ; Yang, Xing ² ; Tang, Zhiyuan ¹⁰ ; Liu, Zhongzhen ¹¹ ; Hou, Hong ¹² ; Chen, Wenfu ¹ ; Rinklebe, Jorg ⁶ ; Pohorely, Michael ¹⁴ ; Wang, Hailong ¹ ;

作者机构： 1.Shenyang Agr Univ, Agron Coll, Shenyang 110866, Liaoning, Peoples R China

2.Foshan Univ, Biochar Engn Technol Res Ctr Guangdong Prov, Sch Environm & Chem Engn, Foshan 528000, Guangdong, Peoples R China

3.Ain Shams Univ, Fac Agr, Dept Soil Sci, Cairo 11241, Egypt

4.Univ Agr Faisalabad, Inst Soil & Environm Sci, Faisalabad 38040, Pakistan

5.Swinburne Univ Technol, Ctr Translat Atomat, Dept Chem & Biotechnol, Hawthorn, Vic 3122, Australia

6.Univ Wuppertal, Sch Architecture & Civil Engn, Inst Fdn Engn Water & Waste Management, Lab Soil & Groundwater Management, Pauluskirchstr 7, D-42285 Wuppertal, Germany

7.King Abdulaziz Univ, Fac Meteorol, Dept Arid Land Agr, Arid Land Agr, Jeddah 21589, Saudi Arabia

8.Univ Kafrelsheikh, Fac Agr, Dept Soil & Water Sci, Kafr Al Sheikh 33516, Egypt

9.Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China

10.Foshan Xincheng Landscaping Engn Co Ltd, Huakang Rd, Foshan 528315, Guangdong, Peoples R China

11.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou 510640, Peoples R China

12.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China

13.Univ Sejong, Dept Environm Energy & Geoinformat, Seoul 05006, South Korea

14.Czech Acad Sci, Inst Chem Proc Fundamentals, Vvi, Rozvojova 135, Prague 16502 6, Czech Republic

15.Univ Chem & Technol Prague, Fac Environm Technol, Dept Power Engn, Tech 5, Prague 16628 6, Czech Republic

关键词： Adsorption; Heavy metal; Biochar modification; Theoretical calculation; Contaminated water

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：14.224； 五年影响因子：12.984 ）

ISSN： 0304-3894

年卷期： 2022 年 425 卷

页码：

收录情况： SCI

摘要： Contamination of aquatic systems by antimony (Sb) is a worldwide issue due to its risks to eco-environment and human health. Batch sorption experiments were conducted to assess the equilibrium, kinetics and thermodynamics of antimonite [Sb(III)] sorption by pristine biochar (BC) and chitosan-loaded biochar (CHBC) derived from branches of Ficus microcarpa. Results showed the successful loading of chitosan onto biochar surface, exhibiting more functional groups (e.g., C--O, -NH2, and -OH). Langmuir model well described the Sb(III) sorption isotherm experimental data, and the maximum sorption capacity of Sb(III) by CH1BC (biochar loaded with chitosan at a ratio of 1:1) was 168 mg g-1, whereas for the BC it was only 10 mg g-1. X-ray photoelectron spectroscopy demonstrated that CH1BC oxidized 86% of Sb(III) to Sb(V), while BC oxidized 71% of Sb(III). Density functional theory calculations suggested that the synergistic effect of exogenous hydroxyl and inherent carbonyl contributed to the enhanced removal efficiency of Sb(III) by CHBC. Key mechanisms for Sb(III) sorption onto CHBCs included electrostatic interaction, chelation, surface complexation, 7C-7C interaction, and hydrogen bonding. Overall, this study implies that CHBC can be a new, viable sorbent for the removal of Sb(III) from aquatic systems aiding their safe and sustainable management.