施加水铁矿对不同蔬菜富集砷的影响  

Application of Ferrihydrite Affects Arsenic Accumulation in Different Vegetables

作　　者：宋阳[1] 张凤琳 杨兆光[1] 王治安 SONG Yang;ZHANG Feng-lin;YANG Zhao-guang;WANG Zhi-an(Center for Environment and Water Resources,Central South University,Changsha 410083,PRC;China CEC Engineering Corporation,Changsha 410019,PRC)

机构地区：[1]中南大学环境与水资源研究中心,湖南长沙410083 [2]中国轻工业长沙工程有限公司,湖南长沙410019

出　　处：《湖南农业科学》2025年第2期40-46,共7页Hunan Agricultural Sciences

基　　金：中南大学研究生科研创新项目(1053320182986);国家公益性行业(农业)科研专项(201503108)。

摘　　要：为探究水铁矿对蔬菜富集砷的影响,以白菜、胡萝卜、芹菜和辣椒4种蔬菜为研究对象,将合成的水铁矿施加到砷污染土壤中进行盆栽试验。结果表明:种植蔬菜组和未种植蔬菜组的土壤中植物可利用砷百分占比均随水铁矿添加量的增加而降低;与未施加水铁矿组相比,施加水铁矿能使胡萝卜、芹菜和辣椒可食部位砷含量显著降低,降幅分别达到72.41%、63.72%和92.74%,且这3种蔬菜体内As(Ⅲ)和As(Ⅴ)含量在水铁矿添加下的变化趋势均与As含量一致;水铁矿处理并未显著影响白菜体内的砷含量;限制胡萝卜、芹菜和辣椒富集砷的水铁矿最佳添加量分别为0.5%、0.5%和1%。综合试验结果分析,水铁矿可应用于限制砷在砷污染区蔬菜可食部位的富集。To investigate the effects of ferrihydrite on arsenic accumulation in vegetables including Chinese cabbage,carrot,celery,and chili,we applied synthesized ferrihydrite to arsenic-contaminated soil for pot experiments.The results showed that the percentage of available arsenic in soil decreased with the increase in the dose of ferrihydrite regardless of whether vegetables were planted or not.Compared with the group without ferrihydrite application,the application of ferrihydrite resulted in decreases of 72.41%,63.72%,and 92.74%in arsenic content in the edible parts of carrot,celery,and chili,respectively.Moreover,the changes in As(Ⅲ)and As(Ⅴ)content in these three vegetables were consistent with that in As content.The application of ferrihydrite did not significantly affect the arsenic content in Chinese cabbage.The optimal doses of ferrihydrite applied to carrot,celery,and chili were 0.5%,0.5%,and 1%,respectively,for limiting arsenic accumulation.Therefore,ferrihydrite can be supplemented to limit the accumulation of arsenic in edible parts of vegetables in arsenic-contaminated areas.

关 键 词：砷 水铁矿 蔬菜 土壤 

分 类 号：X53[环境科学与工程—环境工程]