文献类型： 外文期刊
作者： Li, Detian 1 ; Cui, Hongbiao 1 ; Cheng, Yueqin 4 ; Xue, Lihong 2 ; Wang, Bingyu 7 ; He, Huayong 2 ; Hua, Yun 5 ; Chu, Qin 1 ;
作者机构： 1.Anhui Univ Sci & Technol, Sch Earth & Environm, Huainan 232001, Peoples R China
2.Jiangsu Acad Agr Sci, Key Lab Agroenvironm Downstream Yangtze Plain, Minist Agr & Rural Affairs,Inst Agr Resources & E, Minist Agr & Rural Affairs Peoples Republ China, Nanjing 210014, Peoples R China
3.Jiangsu Acad Agr Sci, Key Lab Crop & Anim Integrated Farming, Minist Agr & Rural Affairs,Inst Agr Resources & E, Minist Agr & Rural Affairs Peoples Republ China, Nanjing 210014, Peoples R China
4.Nanjing Stn Qual Protect Cultivated Land, Nanjing 210036, Peoples R China
5.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China
6.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212001, Jiangsu, Peoples R China
7.Nanjing Univ Sci & Technol, Jiangsu Key Lab Chem Pollut Control & Resources R, Sch Environm & Biol Engn, Nanjing 210094, Peoples R China
8.Anhui Univ Sci & Technol Wuhu, Inst Environm Friendly Mat & Occupat Hlth, Wuhu 241003, Peoples R China
9.Univ Tokyo, Grad Sch Agr & Life Sci, Bunkyo Ku, Tokyo 1138657, Japan
关键词： Hydrochar; Chemical aging; Cadmium; Surface functional groups; Ion exchange
期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）
ISSN： 0269-7491
年卷期： 2021 年 287 卷
页码：
收录情况： SCI
摘要： Hydrochar (HC) serves as a promising adsorbent to remove the cadmium from aqueous solution due to porous structure. The chemical aging method is an efficient and easy-operated approach to improve the adsorption capacity of HC. In this study, four chemical aging hydrochars (CAHCs) were obtained by using nitric acid (HNO3) with mass fractions of 5% (N5-HC), 10% (N10-HC), and 15% (N15-HC) to age the pristine HC (N0-HC) and remove the Cd2+ from the aqueous solution. The results displayed that the N15-HC adsorption capacity was 19.99 mg g(-1) (initial Cd2+ concentration was 50 mg L-1), which increased by 7.4 folds compared to N0-HC. After chemical aging, the specific surface area and oxygen-containing functional groups of CAHCs were increased, which contributed to combination with Cd2+ by physical adsorption and surface complexation. Moreover, ion exchange also occurred during the adsorption process of Cd2+. These findings have important implications for wastewater treatment to transform the forestry waste into a valuable adsorbent for Cd2+ removal from water.
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