枯草芽孢杆菌对废水中Cr^(6+)的吸附特性研究  

Adsorption Properties of Bacillus subtilis for Cr^(6+)in Wastewater

作　　者：陈睿颉 刘箬溪 王昭君 花苑苑 王娟 Chen Ruijie;Liu Ruoxi;Wang Zhaojun;Hua Yuanyuan;Wang Juan(College of Biological,Chemical Science and Engineering,Jiaxing University,Jiaxing,Zhejiang 314001)

机构地区：[1]嘉兴大学生物与化学工程学院,浙江嘉兴314001

出　　处：《嘉兴大学学报》2024年第6期58-64,共7页Journal of Jiaxing University

摘　　要：选用枯草芽孢杆菌作为吸附剂,通过静态吸附实验,探究了不同影响因素下枯草芽孢杆菌对废水中Cr^(6+)的吸附特性。结果表明:枯草芽孢杆菌在8 h后进入对数期,当温度为37℃、pH=7、Cr^(6+)浓度为2 mg/L、转速为150 r/min时吸附效果最佳,最大吸附量为5.69 mg/g,且枯草芽孢杆菌对Cr^(6+)的吸附在48 h时达到平衡。此外,用多个模型对吸附动力学结果进行拟合,除了准一级动力模型外,其余均能达到显著的效果;傅里叶红外光谱显示,枯草芽孢杆菌细表面的羧基、羟基等不饱和烃类,对Cr^(6+)的去除起到主要作用.Bacillus subtilis was selected as an adsorbent,and batch adsorption experiments were conducted to investigate its adsorption characteristics for Cr^(6+)in wastewater under different influencing factors.The results showed that Bacillus subtilis entered the logarithmic phase after 8 h.When the temperature was 37℃,pH was 7,the concentration of Cr^(6+)was 2 mg/L and the rotational speed was 150 r/min,the adsorption capacity was the best(5.69 mg/g),and adsorption equilibrium was reached after 48 h.In addition,multiple models were used to fit the adsorption kinetics results,and all models except the quasi-first-order dynamic model provided remarkable results.Fourier infrared spectroscopy showed that carboxyl and hydroxyl groups and other unsaturated hydrocarbons on the surface of Bacillus subtilis played a major role in removing Cr^(6+).

关 键 词：枯草芽孢杆菌 改性生物炭 含铬废水 吸附动力学 Cr^(6+) 

分 类 号：X791.03[环境科学与工程—环境工程]