磷酸活化柑桔皮生物炭对双酚A的吸附研究  

Study of Bisphenol a Adsorption on Orange Peel Biochar Activated by Phosphoric Acid

作　　者：陈凯 罗少华 胡志华 贾漫珂 刘立明 任东 CHEN Kai;LUO Shaohua;HU Zhihua;JIA Manke;LIU Liming;REN Dong(College of Biological&Pharmaceutical Sciences,China Three Gorges Univ.,Yichang 443002,China;Hubei Zhengjiang Environmental Science&Technology Co.,Ltd,443002,China;Hubei Agricultural Environmental Monitoring Engineering Technology Research Center,Yichang 443002,China)

机构地区：[1]三峡大学生物与制药学院,湖北宜昌443002 [2]湖北正江环保科技有限公司,湖北宜昌443002 [3]湖北省农田环境监测工程技术研究中心,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2021年第6期106-112,共7页Journal of China Three Gorges University：Natural Sciences

基　　金：国家重点研发计划(2016YFD0800902);湖北省技术创新重大专项(2017ABA157)。

摘　　要：利用农业废弃物制备生物质炭作为吸附材料可用于水体中污染物的处理.本文制备了柑桔皮原生生物质炭和磷酸改性生物质炭,通过对比其对双酚A的吸附性能和Zeta电位、FTIR、BET、XRD等表征结果,研究了磷酸浸渍浓度和热解温度对生物质炭材料的影响.结果表明:经磷酸活化后,生物质炭吸附能力增加,350℃热解温度下制备的生物质炭对双酚A的饱和吸附量可达244.61 mg·g^(-1);磷酸活化后生物质炭的表面负电性减小使其稳定性减小,同时表面共轭烯结构和羟基增强,表面微孔更多,这些可能是磷酸活化生物质炭具有更高吸附活性的原因,并对其吸附双酚A的过程进行了热力学和动力学研究.Biochar prepared from agricultural wastes can be used as adsorption material for the treatment of pollutants in water.In this paper,citrus peel biochar and phosphoric acid modified biochar materials are prepared under N2 atmosphere at three different temperature.The effects of phosphoric acid impregnation concentration and pyrolysis temperature on the chemical and physical properties of Biochar materials are studied by comparing their adsorption capability of BPA and characterization results of Zeta potential,FTIR,BET and XRD.The results show that the adsorption capacity of biochar activated by phosphoric acid increases,and the saturated adsorption capacity of biochar prepared at 350℃for BPA reaches 244.61 mg·g^(-1).The stability of biochar in water is reduced due to the decrease of surface negative charge.The conjugated alkenes structure and hydroxyl groups are enhanced.Meanwhile,more micropores on the surface could be attributed to the modification process and contribute to the increase of BPA adsorption capacity.

关 键 词：生物炭 磷酸改性 吸附 双酚A 

分 类 号：X792[环境科学与工程—环境工程]