文献类型：期刊文献

中文题名：基于天然材料高分子复合重金属稳定剂的研制

英文题名：DEVELOPMENT OF A POLYMER COMPOSITE HEAVY METALS STABILIZER BASED ON NATURAL MATTERS

作者：韩永萍[1];李红梅[2];段炫彤[1];赵月霞[1];刘红梅[1]

第一作者：韩永萍

机构：[1]北京联合大学生物工程学院,北京100023;[2]中国寰球工程公司设计部,北京100012

第一机构：北京联合大学生物化学工程学院

年份：2019

卷号：37

期号：10

起止页码：222-226

中文期刊名：环境工程

外文期刊名：Environmental Engineering

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：北京市朝阳区科技提升项目(XC1619)

语种：中文

中文关键词：腐植酸;壳聚糖;木质素;重金属;稳定剂

外文关键词：humic acid;chitosan;lignin;heavy metals;stabilizer

摘要：以腐植酸、壳聚糖、木质素3种天然材料为基本原料,以戊二醛为交联剂,通过交联、互传网络、凝聚等作用制备高分子复合稳定剂。结果表明:3种天然材料对Pb^2+的吸附性能顺序为腐植酸>木质素>壳聚糖。稳定剂的制备工艺条件为:原料总量为6 g,其中m木质素∶m壳聚糖∶m腐植酸=2∶1.5∶2.5,10%的戊二醛为10 m L,反应温度为70℃,反应时间为8 h。在该条件下制备的稳定剂对土壤重金属Pb的稳定化率较同条件下原料提高约30%。红外光谱结构表征和电镜扫描发现,稳定剂中活性基团种类丰富,具有较大的比表面积,可用于稳定土壤中的多种重金属。
Three natural materials,humic acid,chitosan and lignin were used as the basic raw materials,and glutaraldehyde was used as the crosslinking agent to prepare composite stabilizer through crosslinking,mutual transmission network and agglomeration.The results showed that the adsorption capacities for Pb^2+by the three natural materials were in sequence of humic acid>lignin>chitosan.The optimized preparation process of the stabilizer was as follows:6 g of total raw material(with mass ratio of lignin,chitosan,and humicacid of 2.0∶1.5∶2.5),10%glutaraldehyde 10 m L,reaction temperature of 70℃,reaction time of 8 h.Under this condition,the prepared stabilizer had an ideal stabilization performance for Pb in soil,which was more than 30%higher than that of the raw materials under the same condition.Infrared spectroscopy and electron microscopy revealed that the stabilizers were rich in reactive groups and had a large specific surface area,which was expected to be applied in stabilization of heavy metals in the soil.