Efficient adsorption of ciprofloxacin using Ga2S3/S-modified biochar via the high-temperature sulfurization.

Bioresource Technology
Xiaogang ZhengSihao Lv

Abstract

Ga2S3 and sulfur co-modified biochar (Ga/S-BC) composites were prepared for enhancing the adsorption of ciprofloxacin from sugarcane bagasse via the high-temperature sulfurization. In contrast with sulfur-modified biochar, Ga/S-BC exhibited the better adsorption capacity for ciprofloxacin removal. The increasing Ga content induced to the climbing and then declining adsorption activity of Ga/S-BC. Among these obtained Ga/S-BC composites, optimal 3-Ga/S-BC with a Ga content of 7.40% and surface area of 681.67 m2 g-1 exhibited the superior capacity of 330.21 mg g-1. The adsorption capacity of 3-Ga/S-BC declined to 301.66 mg g-1 after nine cycles. pH and inorganic salts also affected the adsorption capacity of 3-Ga/S-BC for ciprofloxacin removal. The adsorption isotherms of obtained Ga/S-BC composites were well described by Langmuir isotherm, and their adsorption kinetics were well estimated via second-order model. The adsorption performance of 3-Ga/S-BC in ciprofloxacin removal was a physisorption and spontaneous process.

References

Jan 15, 2013·Journal of Hazardous Materials·Sudipta RakshitRupali Datta
Dec 21, 2016·Environmental Science & Technology·Lanfang HanBaoshan Xing
Dec 5, 2017·The Science of the Total Environment·David O'ConnorDeyi Hou
Oct 7, 2018·Journal of Environmental Sciences (China)·Jie LiXiaofu Shang
Nov 27, 2018·Bioresource Technology·Thanh-Tin NguyenPhan-Thai-Vy Nguyen
Nov 26, 2019·Bioresource Technology·Xiaogang ZhengSihao Lv
Dec 17, 2019·Bioresource Technology·Yunqiang YiZhanqiang Fang
Sep 21, 2020·Bioresource Technology·Wei-Hao HuangChihpin Huang

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