基于耦合模型的重金属污染土壤植物修复效益空间差异分析  

ANALYSIS OF SPATIAL DIFFERENTIATION OF BENEFITS OF PHYTOREMEDIATION OF HEAVY METAL CONTAMINATED SOIL USING COUPLED MODEL

作　　者：王维[1] 张金婷[1] 王伟[2] 周静[2] 刘晓磊[3] 孙华[1] 

机构地区：[1]南京农业大学资源环境与城乡规划系,南京210095 [2]中国科学院南京土壤研究所,南京210008 [3]江苏省环境保护厅,南京210036

出　　处：《土壤学报》2014年第3期547-554,共8页Acta Pedologica Sinica

基　　金：国家自然科学基金项目(41371484;71073082);环保部重金属污染防治专项"江铜贵冶周边区域九牛岗土壤修复示范项目";江苏省"青蓝工程"项目资助

摘　　要：在污染土壤生态修复的同时须兼顾其经济、社会效益,以提高其修复综合效益并推动修复工作的顺利开展。以贵溪市为研究区域,使用耦合模型对污染土地植物修复效益进行空间差异评价并筛选适宜的修复植物类型。研究结果显示:研究区域重金属污染土壤植物修复综合效益存在较大空间差异,其中水泉区重金属污染土壤植物修复效益最低为0.173 6,苏门区重金属污染土壤植物修复效益最高为0.835 4;九牛岗区和庞源区效益相近,效益值小于0.4,属于效益较低区块;在种植植物类型上看,混合种植的树木和乔灌木植物,能产生较好的效益,单纯种植一种植物类型,总体效益低;建议将高效益的苏门区植物类型和种植方式进行推广,并采用红叶石楠和栾树间套种植方式。To raise the comprehensive benefits （including ecological,economic and social benefits） of phytoremedi- ation of heavy metal contaminated soils for smooth development of the work, a case study was conducted of Guixi, using a coupled model to analyze spatial differentiation of benefits of the phytoremediation and to screen out proper types of plants for use in phytoremediation. Results show that comprehensive benefits of the phytoremediation varied from region to region comprehensive benefits was the lowest in Shuiquan, being only 0. 173 6, the highest, in Sumen, reaching as high as 0. 835 4 ; and approximate in Jiuniugang and Pangyuan, both being lower than 0.4, and falling into the category of low ben- efit region. Among the types of vegetation used in phytoremediation, mixed plantation of arbor trees and shrubs was the best and mono-planting was the poorest in overall benefit. It is,therefore,recommended that the high-efficiency planting pattern in Sumen,i. e. mixed plantation of Photinia fraseri and Koelreuteria panieulata,be promoted.

关 键 词：土壤 重金属污染 植物修复 耦合模型 贵溪市 

分 类 号：X820.4[环境科学与工程—环境工程]