Zheng Xiaogang, He Xinyue, Peng Hao, Wen Jing, Lv Sihao
College of Chemistry and Chemical Engineering, Key Laboratory of Sichuan Province for Fishes Conservation and Utilization in the Upper Reaches of the Yangtze River, Neijiang Normal University, Neijiang Sichuan 641100, China; Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan Guangdong 523808, China.
College of Chemistry and Chemical Engineering, Key Laboratory of Sichuan Province for Fishes Conservation and Utilization in the Upper Reaches of the Yangtze River, Neijiang Normal University, Neijiang Sichuan 641100, China.
Bioresour Technol. 2021 Aug;334:125238. doi: 10.1016/j.biortech.2021.125238. Epub 2021 Apr 30.
GaS 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 m g exhibited the superior capacity of 330.21 mg g. The adsorption capacity of 3-Ga/S-BC declined to 301.66 mg g 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.
通过高温硫化制备了GaS和硫共改性生物炭（Ga/S-BC）复合材料，以增强甘蔗渣对环丙沙星的吸附。与硫改性生物炭相比，Ga/S-BC对环丙沙星的去除表现出更好的吸附能力。Ga含量的增加导致Ga/S-BC的吸附活性先升高后下降。在这些制备的Ga/S-BC复合材料中，Ga含量为7.40%、比表面积为681.67 m²/g的最佳3-Ga/S-BC表现出330.21 mg/g的优异吸附容量。经过九个循环后，3-Ga/S-BC的吸附容量降至301.66 mg/g。pH值和无机盐也影响3-Ga/S-BC对环丙沙星的去除吸附容量。所制备的Ga/S-BC复合材料的吸附等温线符合Langmuir等温线，其吸附动力学通过二级模型得到很好的估算。3-Ga/S-BC对环丙沙星的吸附性能是一个物理吸附和自发过程。
