摘要
利用廉价生物吸附剂去除污水中Pb2+和Zn2+的技术,研究了食用菌菌糠的吸附特性,调查污水pH、重金属初始浓度、吸附剂用量、吸附时间和温度对其吸附性能的影响.结果表明,在食用菌菌糠吸附剂用量分别为16g/L和12g/L,pH值分别为5和6,初始重金属质量浓度为20mg/L,吸附时间为3h,25℃条件下,达到了最大吸附量,对Pb2+和Zn2+的去除率分别达到92.79%和88.96%,处理后的Pb2+和Zn2+质量浓度分别为1.442mg/L和2.208mg/L,接近污水综合排放标准(GB8978—1996)中的排放质量浓度1mg/L和2mg/L.食用菌菌糠对Pb2+和Zn2+的吸附等温线符合Fleundlich模式.
By using the technology of low-cost biosorbent for remove Pb2＋ and Zn2＋ in wastewater,the adsorption of spent mushroom substrates was studied.The effect of different parameters such as pH,initial concentration of heavy metals,adsorbent dosage,adsorption time,and temperature to the adsorption ability were investigated.The results show that（1） The adsorption efficiency of Pb2＋ could reach 92.79% at the following optimum conditions： adsorbent dosage 16g/L,pH 5,initial concentration of heavy metals 20mg/L,adsorption temperature 25℃ for 3h;（2） The adsorption efficiency of Zn2＋could reach 88.96% at the following optimum conditions： adsorbent dosage 12g/L,pH 6,initial concentration of heavy metals 20mg/L,adsorption temperature 25℃ for 3h.After treatment,the concentration of Pb2＋ and Zn2＋ were 1.442mg/L and 2.208mg/L,which close to the integrated wastewater discharge standard（GB8978-1996）.
出处
《西安工程大学学报》
CAS
2011年第1期51-54,共4页
Journal of Xi’an Polytechnic University
关键词
生物吸附
食用菌菌糠
重金属离子
水处理
biosorbent
spent mushroom substrates
heavy metal ion
water treatment
作者简介
通讯作者：周飞（1965-），男，陕西省宝鸡市人，西安工程大学副教授，博士．E-mail：yuozhong4@163．com
