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  • 刘静欣,张文娟,李俊强,桑培伦,王海鹰.交联腐殖酸CHA对水体中铅的吸附性能[J].环境工程学报,2012,6(3):725-728.DOI:    [点击复制]
  • Liu Jingxin,Zhang Wenjuan,Li Junqiang,Sang Peilun,Wang Haiying.Adsorption performance of lead ion onto cross-linked humic acid in aqueous solutions[J].,2012,6(3):725-728.DOI:   [点击复制]
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交联腐殖酸CHA对水体中铅的吸附性能
刘静欣, 张文娟, 李俊强, 桑培伦, 王海鹰
0
(中南大学冶金科学与工程学院,长沙 410083)
摘要:
通过环氧氯丙烷交联及多胺改性的方法,制备得到新型交联腐殖酸CHA。利用FTIR对其结构进行了表征,并重点考察了吸附温度等不同因素对CHA吸附水体中铅离子性能的影响。结果表明,交联腐殖酸CHA对水体中铅离子具有优异的吸附性能,平衡吸附容量可达到219.3 mg/g,远高于常规高温焙烧方法制得腐殖酸的吸附性能。CHA的吸附性能随反应温度、溶液pH的升高而增大,其吸附过程符合Langmuir吸附方程。
关键词:  腐殖酸  铅离子  交联  吸附
DOI:
投稿时间:2011-01-21修订日期:2011-03-20
基金项目:国家“水体污染控制与治理”科技重大专项(2009ZX07212-001-01);大学生创新性实验计划项目(LA09009)
Adsorption performance of lead ion onto cross-linked humic acid in aqueous solutions
Liu Jingxin, Zhang Wenjuan, Li Junqiang, Sang Peilun, Wang Haiying
(School of Metallurgical Science and Engineering, Central South University, Changsha 410083,China)
Abstract:
A novel cross-linked humic acid (CHA) was synthesized by mixing epichlorohydrine and polyamine. The structure of the product was characterized by FTIR. The main emphasis was given on the effect of various factors on the Pb2+ adsorption with CHA in aqueous solution. The results show that the CHA possesses excellent adsorption ability for the Pb2+. The maximum adsorption capacity can reach up to 219.3 mg/g, which is much higher than that of the insolubilized humic acid prepared by heat treatment. The adsorption performance of CHA is enhanced with the increase of the solution temperature and pH. The adsorption process of CHA fits the Langmuir model.
Key words:  humic acid  lead ion  crosslink  adsorption