银杏落叶对孔雀石绿的生物吸附作用  

Biosorption of malachite green by ginkgo leaves

作　　者：李薇[1] 孙志宇[2] 马宏飞[2] 孔祥俊[2] 李法云[1] 范志平[1] 

机构地区：[1]辽宁石油化工大学生态环境研究院,辽宁抚顺113001 [2]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001

出　　处：《应用化工》2015年第11期2001-2005,共5页Applied Chemical Industry

基　　金：国家水体污染控制与治理科技重大专项资助(2012ZX07505-001-01);辽宁石油化工大学环境科学与工程学科创新团队资助([2014]11号)

摘　　要：利用秋季银杏落叶为生物吸附剂,研究了其对孔雀石绿的吸附性能、等温吸附模型和吸附动力学。考察了吸附时间、银杏落叶投加量、p H值、孔雀石绿初始浓度等因素对孔雀石绿吸附的影响。结果表明,吸附平衡时间2 h,银杏落叶投加量4 g/L,中性条件下就能达到较好的孔雀石绿吸附效果。25℃,银杏落叶对孔雀石绿吸附符合Langmuir、Freundlich、Temkin模型,最大吸附量为74.07 mg/g。吸附动力学可用准二级动力学模型更好的描述。The adsorption behavior,isotherm model and dynamics of malachite green by ginkgo leaves as a biological adsorbent have been studied. The effects of contact time,ginkgo leaves dosage,p H value,malachite green initial concentration on malachite green adsorption have been investigated,respectively. The results show that the better malachite green adsorption efficiency can be obtained in the contact time of2 h,ginkgo dosage of 4 g / L and neutral solution. The adsorption of malachite green on ginkgo leaves fits with Langmuir,Freundlich and Temkin models at 25 ℃,and the maximum adsorption capacity is74. 07 mg / g. The adsorption dynamic model fits with pseudo-second-order dynamic model better.

关 键 词：孔雀石绿 银杏落叶 吸附 等温吸附模型 

分 类 号：TQ014[化学工程] X592[环境科学与工程—环境工程]