| Title: | Ball milling biochar with ammonia hydroxide or hydrogen peroxide enhances its adsorption of phenyl volatile organic compounds (VOCs) |
| Author(s): | Zhang X; Miao X; Xiang W; Zhang J; Cao C; Wang H; Hu X; Gao B; |
| Address: | "Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse, School of Environmental Engineering, Xuzhou University of Technology, Xuzhou, 221018, China; Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, 32611, USA. Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse, School of Environmental Engineering, Xuzhou University of Technology, Xuzhou, 221018, China. Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong, 528000, China; Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, China. State Key Laboratory of Analytical Chemistry for Life Science, Center of Material Analysis, 20 Hankou Road, Nanjing University, Nanjing, 210093, China. Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, 32611, USA. Electronic address: bg55@ufl.edu" |
| DOI: | 10.1016/j.jhazmat.2020.123540 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Pristine biochar (CN600), ball-milled biochar (CN600-BM), H(2)O(2) modified BM-biochar (CN600-O), and NH(4)OH modified BM-biochar (CN600-N) derived from corn stalk were applied to adsorb phenyl volatile organic compounds (VOCs). H(2)O(2) and NH(4)OH modification of BM-biochar significantly improved its physicochemical characteristics and adsorption abilities. The specific surface area of CN600-O increased 2.05 and 1.23 times compared to CN600 and CN600-BM, respectively; while CN600-N increased 2.41 and 1.45 times, respectively. In addition, the ball milled biochars, especially CN600-O, showed higher acidity and polarity than CN600. The VOC adsorption amount onto biochars was 10.96-130.21 mg/g. CN600-O and CN600-N had high uptake of the VOCs and reached 100.07-111.79 mg/g and 110.49-130.21 mg/g, respectively. CN600-N showed the best performance with P-xylene adsorption up to 130.21 mg/g. VOC adsorption onto the CN600-O and CN600-N were mainly governed by surface adsorption and associated with morphology characteristics of the biochars as well as VOC properties such as boiling point and molecular size. Five cycles of adsorption-desorption experiments showed that CN600-O and CN600-N had good reusability with the reuse efficiencies of 88.01 %-92.21 % and 92.19 %-95.39 %, respectively. The results indicate that O- and N-doped ball-milled biochars are promising in adsorption for effective and sustainable VOC removal" |
| Keywords: | Adsorption Ammonia Charcoal Hydrogen Peroxide Hydroxides *Volatile Organic Compounds Modified biochar N-doped ball-milled biochar O-doped ball-milled biochar Phenyl group VOC removal; |
| Notes: | "MedlineZhang, Xueyang Miao, Xudong Xiang, Wei Zhang, Jiankun Cao, Chengcheng Wang, Hailong Hu, Xin Gao, Bin eng Research Support, Non-U.S. Gov't Netherlands 2020/12/04 J Hazard Mater. 2021 Feb 5; 403:123540. doi: 10.1016/j.jhazmat.2020.123540. Epub 2020 Jul 26" |
