耐铅锌微生物对矿山酸性废水中Zn2+和Pb2+吸附性能分析
来源期刊：中南大学学报(自然科学版)2013年第4期
论文作者：陈月芳 高琨 林海 董颖博 汪涵 李洋子 霍汉鑫 曹丽霞
文章页码：1741 - 1746
关键词：矿山酸性废水；微生物吸附；重金属；铅；锌；等温线模型
Key words：acid mine drainage; biosorption; heavy metal; lead; zinc; isotherm model
摘 要：以分离于某铅锌矿选矿废水排水沟土壤中的菌株T1为对象，研究重金属离子Zn和Pb初始质量浓度、pH、吸附时间、吸附温度和菌体浓度等因素对菌株T1吸附矿山酸性废水中Zn2+和Pb2+的影响。结果表明：考虑处理效果与经济成本的优化，在Zn2+和Pb2+的初始质量浓度分别为100 mg/L和30 mg/L，溶液pH4.0，菌体质量浓度3 g/L，吸附时间6 h，温度30 ℃的条件下，菌体T1对Zn2+和Pb2+的最大吸附率分别为79.86%和69.04%，此时吸附量分别为26.62 mg/g和6.9 mg/g。在一定的质量浓度范围内(Zn2+为25~125 mg/L，Pb2+为10~50 mg/L)，菌株T1吸附Zn2+和Pb2+的过程符合Langmuir等温吸附方程，该过程以表面吸附为主。
Abstract: With the strain T1 which separated from drains soil of certain lead-zinc ore dressing as the research object, the effect on strain T1 adsorbing Zn2+ and Pb2+ in AMD was investigated under influence factors such as the initial consistence of Zn2+and Pb2+, pH, time, temperature and cell concentration. The results indicate that, the maximum adsorptions of Zn2+ and Pb2+ respectively reach to 79.86% and 69.04%, given the optimization of both treatment effect and economic costs, meanwhile, the adsorption capacities are 26.62 mg/g and 6.9 mg/g, when the initial mass concentrations of Zn2+ and Pb2+ are individually 100 mg/L and 30 mg/L, the pH is 4.0, cell mass concentration is 3 g/L, time is 6 h and temperature is 30 ℃. The process of strain T1 adsorbing Zn2+ and Pb2+ is in line with Langmuir isotherm model under the mass concentration range of 25-125 mg/L Zn2+ and 10-50 mg/L Pb2+, which is priority to surface adsorption.
陈月芳，高琨，林海，董颖博，汪涵，李洋子，霍汉鑫，曹丽霞
(北京科技大学 土木与环境工程学院，北京，100083)
摘 要：以分离于某铅锌矿选矿废水排水沟土壤中的菌株T1为对象，研究重金属离子Zn和Pb初始质量浓度、pH、吸附时间、吸附温度和菌体浓度等因素对菌株T1吸附矿山酸性废水中Zn2+和Pb2+的影响。结果表明：考虑处理效果与经济成本的优化，在Zn2+和Pb2+的初始质量浓度分别为100 mg/L和30 mg/L，溶液pH4.0，菌体质量浓度3 g/L，吸附时间6 h，温度30 ℃的条件下，菌体T1对Zn2+和Pb2+的最大吸附率分别为79.86%和69.04%，此时吸附量分别为26.62 mg/g和6.9 mg/g。在一定的质量浓度范围内(Zn2+为25~125 mg/L，Pb2+为10~50 mg/L)，菌株T1吸附Zn2+和Pb2+的过程符合Langmuir等温吸附方程，该过程以表面吸附为主。
关键词：矿山酸性废水；微生物吸附；重金属；铅；锌；等温线模型
CHEN Yuefang, GAO Kun, LIN Hai, DONG Yingbo, WANG Han, LI Yangzi, HUO Hanxin, CAO Lixia
(School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China)
Abstract:With the strain T1 which separated from drains soil of certain lead-zinc ore dressing as the research object, the effect on strain T1 adsorbing Zn2+ and Pb2+ in AMD was investigated under influence factors such as the initial consistence of Zn2+and Pb2+, pH, time, temperature and cell concentration. The results indicate that, the maximum adsorptions of Zn2+ and Pb2+ respectively reach to 79.86% and 69.04%, given the optimization of both treatment effect and economic costs, meanwhile, the adsorption capacities are 26.62 mg/g and 6.9 mg/g, when the initial mass concentrations of Zn2+ and Pb2+ are individually 100 mg/L and 30 mg/L, the pH is 4.0, cell mass concentration is 3 g/L, time is 6 h and temperature is 30 ℃. The process of strain T1 adsorbing Zn2+ and Pb2+ is in line with Langmuir isotherm model under the mass concentration range of 25-125 mg/L Zn2+ and 10-50 mg/L Pb2+, which is priority to surface adsorption.
Key words:acid mine drainage; biosorption; heavy metal; lead; zinc; isotherm model
