改性稻壳水热炭对苯酚的吸附  

Adsorption of phenol by modified rice husk hydrochar

作　　者：段佳男 叶志伟 王曦 何苑静 顾铮 李登新[1,2,4] 许士洪 DUAN Jia-nan;YE Zhi-wei;WANG Xi;HE Yuan-jing;GU Zheng;LI Deng-xin;XU Shi-hong(School of Environmental Science and Engineering,Donghua University,Shanghai 201600,China;National Environmental Protection Textile Pollution Control Engineering Technology Center,Donghua University,Shanghai 201600,China;Shanghai Tongji Construction Co.,Ltd.,Shanghai 200000,China;State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200000,China)

机构地区：[1]东华大学环境科学与工程学院,上海201600 [2]东华大学国家环境保护纺织污染防治工程技术中心,上海201600 [3]上海同济建设有限公司,上海200000 [4]同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海200000

出　　处：《应用化工》2022年第1期17-21,27,共6页Applied Chemical Industry

基　　金：国家自然科学基金钢铁联合基金(U1660107)。

摘　　要：稻壳在220℃下水热炭化4 h,制备水热炭(BC),用FeCl_(3)和葡萄糖进行改性,制备氯化铁改性水热炭(FBC)和葡萄糖改性水热炭(GBC)。探究了投加量和pH对水热炭吸附苯酚的影响,并对水热炭进行表征,结合吸附动力学和吸附等温线模型研究了吸附机理。结果表明,FBC的比表面积和孔容增大,GBC含氧官能团增多,比表面积增大。在投加量为20 g/L,pH不变的情况下吸附24 h, GBC和FBC对苯酚的去除率可达68.6%和65.7%,较BC提高了约20个百分点。三种水热炭对苯酚的吸附过程均符合准二级动力学和Langmiur吸附等温线,说明该吸附过程是以化学吸附为主的单分子层吸附。Hydrochar(BC) was prepared from rice husk by hydrothermal carbonization at 220 ℃ for 4 h, FBC and GBC were modified by FeCl_(3) and glucose.The effects of dosage and pH on the adsorption of phenol by hydrochar were investigated, and the adsorption mechanism was studied through adsorption kinetics and adsorption isotherm model, combining with the characterizations of hydrochar.The results show that the specific surface area and pore volume of FBC increase, and the oxygen-containing functional groups and specific surface area of GBC increase.Under the condition of 20 g/L dosage and constant pH for 24 h, the removal rates of phenol by GBC and FBC can achieve to 68.6% and 65.7%,respectively, which is about 20 percentage points higher than that by BC.Adsorption processes of three kinds of hydrochars for phenol all conform to the quasi-second-order kinetic model and Langmiur adsorption isotherm model, suggesting that the adsorption processes are mainly chemisorption monolayer adsorption.

关 键 词：稻壳水热炭 FeCl_(3)改性 葡萄糖改性 苯酚 吸附 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]