Role of intrinsic defects on carbon adsorbent for enhanced removal of Hg2+ in aqueous solution

doi:10.1016/j.cjche.2023.03.021

中国化学工程学报 ›› 2023, Vol. 61 ›› Issue (9): 129-139.DOI: 10.1016/j.cjche.2023.03.021

• Full Length Article • 上一篇下一篇

Role of intrinsic defects on carbon adsorbent for enhanced removal of Hg²⁺ in aqueous solution

Liu He¹, Yiyang Qiu¹, Chu Yao¹, Guojun Lan¹, Na Li², Huacong Zhou², Quansheng Liu², Xiucheng Sun¹, Zaizhe Cheng¹, Ying Li¹

1. Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou 310058, China;
2. Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources, Huhhot 010051, China

收稿日期:2023-01-06 修回日期:2023-03-07 出版日期:2023-09-28 发布日期:2023-12-14
通讯作者: Ying Li,E-mail:liying@zjut.edu.cn
基金资助:
This work was funded by the 2019 “Rare Earth and Coal Chemical Industry” Key Science and Technology Project of Inner Mongolia Autonomous Region of China (2019ZD017), the National Natural Science Foundation of China (21908197, 22108248, 22208305).

Role of intrinsic defects on carbon adsorbent for enhanced removal of Hg²⁺ in aqueous solution

Liu He¹, Yiyang Qiu¹, Chu Yao¹, Guojun Lan¹, Na Li², Huacong Zhou², Quansheng Liu², Xiucheng Sun¹, Zaizhe Cheng¹, Ying Li¹

1. Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou 310058, China;
2. Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources, Huhhot 010051, China

Received:2023-01-06 Revised:2023-03-07 Online:2023-09-28 Published:2023-12-14
Contact: Ying Li,E-mail:liying@zjut.edu.cn
Supported by:
This work was funded by the 2019 “Rare Earth and Coal Chemical Industry” Key Science and Technology Project of Inner Mongolia Autonomous Region of China (2019ZD017), the National Natural Science Foundation of China (21908197, 22108248, 22208305).

摘要/Abstract

摘要： Carbon is a normally used adsorbent for removal of heavy metal ion in aqueous solutions, but the efficient adsorbent needs intensive modification by heteroatom doped or supported noble metals that cause severe pollution and easy leaching of active components during use. In this paper, the role of intrinsic defects on Hg²⁺ adsorption for carbon adsorbent was investigated. The maximum adsorbing capacity of defect-rich carbon has been improved up to 433 mg·g^-1 which is comparable to most of the modified carbon adsorbents via supported metal chloride or noble metal components. The basicity is increased with the content of defective sites and the strong chemical bonding can be formed via electron transformation between the defect sites with adsorbed Hg²⁺. The present study gives a direction to explore cheap and easily scale-up high-performance mercury adsorbents by simply tuning the intrinsic defective structure of carbon without the necessity to support metal or other organic compounds.

关键词: Mercury-ion removal, Adsorption, Carbon adsorbent, Defect sites

Abstract: Carbon is a normally used adsorbent for removal of heavy metal ion in aqueous solutions, but the efficient adsorbent needs intensive modification by heteroatom doped or supported noble metals that cause severe pollution and easy leaching of active components during use. In this paper, the role of intrinsic defects on Hg²⁺ adsorption for carbon adsorbent was investigated. The maximum adsorbing capacity of defect-rich carbon has been improved up to 433 mg·g^-1 which is comparable to most of the modified carbon adsorbents via supported metal chloride or noble metal components. The basicity is increased with the content of defective sites and the strong chemical bonding can be formed via electron transformation between the defect sites with adsorbed Hg²⁺. The present study gives a direction to explore cheap and easily scale-up high-performance mercury adsorbents by simply tuning the intrinsic defective structure of carbon without the necessity to support metal or other organic compounds.

Key words: Mercury-ion removal, Adsorption, Carbon adsorbent, Defect sites

Liu He, Yiyang Qiu, Chu Yao, Guojun Lan, Na Li, Huacong Zhou, Quansheng Liu, Xiucheng Sun, Zaizhe Cheng, Ying Li. Role of intrinsic defects on carbon adsorbent for enhanced removal of Hg²⁺ in aqueous solution[J]. 中国化学工程学报, 2023, 61(9): 129-139.

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Role of intrinsic defects on carbon adsorbent for enhanced removal of Hg²⁺ in aqueous solution

Role of intrinsic defects on carbon adsorbent for enhanced removal of Hg²⁺ in aqueous solution

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