摘要
从排污口废水中筛选到一株能耐受一定浓度Pb^(2+)和Zn^(2+)的低温真菌,将其作为吸附剂,研究了其吸附动力学及吸附方式、温度和pH值对其吸附Pb^(2+)和Zn^(2+)的影响,绘制、拟合吸附等温线,并在模拟废水环境中进行逐级吸附试验。结果表明:Pb^(2+)和Zn^(2+)初始浓度接近100 mg/L时,可在20℃吸附15 min时达到平衡,吸附曲线符合Langmuir等温吸附模型,静态吸附的吸附量偏高。当pH值为4~6,温度在4~15℃时吸附量最大,这正是低温真菌的优势所在。人工配制了含Pb^(2+)和Zn^(2+)的模拟废水,分别经过5级和6级吸附后,出水可达到GB 25466—2010《铅、锌工业污染物排放标准》要求。
A strain of low temperature fungi was screened from the sewage effluent,which could tolerate certain concentration of Pb^2＋and Zn^2＋. The adsorption kinetics,adsorption methods,temperature and pH value on the adsorption of Pb^2＋ and Zn^2＋were studied by low temperature fungi. The adsorption isotherm was fitted and drawn,and the adsorption test was carried out step by step,using the simulated wastewater. The results showed that when the initial concentrations of Pb^2＋ and Zn^2＋were close to 100 mg/L and the temperature was 20 ℃,and the balance was achieved after 15 min,and the adsorption curve fitted with Langmuir isothermal adsorption model. The adsorption capacity was higher in the static adsorption,and reached a peak when the pH value was 4 ～ 6 and the temperature was 4 ～ 15 ℃（ suitable for the low temperature fungi）. The Pb^2＋,Zn^2＋ containing simulated wastewater,after being adsorbed respectively after 5 and 6 levels,could meet China＇s National Emission Standard of Pollutants for Lead and Zinc Industry（ GB 25466—2010）.
作者
谢莹
曹艳妮
XIE Ying;CAO Yan-ni(College of Biology and Food Engineering, Jilin Institute of Chemical Technology, Jilin 132022, China;Geologic Exploration Institute, Liaoning Bureau of Geology and Mineral Exploration for Metallurgy, Anshan 114038, China)
出处
《环境工程》
CAS
CSCD
北大核心
2018年第6期58-62,共5页
Environmental Engineering
基金
吉林化工学院科技计划项目"低温菌对重金属离子的吸附特性研究"
