无瓣海桑模拟湿地系统中Pb的分布迁移及净化效应  

The Distribution Migration and Purification of Lead in an Artificial Sonneratia Apetala Wetland System

作　　者：刘金苓[1] 章家恩[2] 廖宝文[3] 李玫[3] 

机构地区：[1]广州市环境保护科学研究院,广州510620 [2]华南农业大学农学院,广州510642 [3]中国林科院热带林业研究所,广州510520

出　　处：《广州环境科学》2012年第1期20-24,共5页Guangzhou Environmental Science

基　　金：国家自然科学基金项目(项目编号40876062);国家林业科技支撑计划专题(项目编号2009BADB2B0401);广州市林业与园林局项目"广州南沙湿地环境效应监测"

摘　　要：在温室中建立红树林植物无瓣海桑模拟湿地系统,分别用1倍、5倍和10倍浓度3种人工配制的生活污水定时定量对模拟系统污灌4个月,研究重金属Pb的分布、迁移以及湿地系统对Pb污染的净化效应。结果表明,污水中的Pb主要存留在土壤子系统中,只有很少部分迁移到植物体和凋落物中,无瓣海桑根部Pb含量最高;模拟系统对污水中Pb的净化效果显著,在植物-土壤-水系统中,1倍、5倍和10倍浓度组的净化效率分别为97.61%、87.84%和87.71%,在无植物系统中,对应组分别为93.64%、88.17%和85.48%。An artificial mangrove Sonneratia apetala wetland was set up in a greenhouse, and the behavior of lead（Pb）in the wetland system was studied with Sonneratia apetala seedlings. The characteristics and concentrations of the synthetic wastewater were similar to normal domestic wastewater, while the nutrients and heavy metals of five-fold-concentrations and ten-fold-concentrations of wastewater was five and ten times as those in synthetic wastewater. Each pot was quantitatively irrigated with wastewater for 4 months. Results showed that, Pb in the synthetic wastewater was mainly retained in the soil subsystem, and only a small portion migrated into plants and litters. Pd content in roots was higher than that in stems and leaves. The artificial Sonneratia apetala wetland system showed positive effect on purifying Pb in synthetic wastewater significantly. The purification rates for SW, FW and TW w ere 93.64%, 88.17% and 85.48%, respectively, while in the system without plant, the corresponding purification rates were 81.18%, 85.46% and 80.96%, respectively.

关 键 词：无瓣海桑 模拟湿地系统 PB 分布 迁移 净化效应 

分 类 号：X173[环境科学与工程—环境科学]