Zhao Ye, Han Sha-Sha, Chen Zhi-Fan, Liu Jing, Hu Honq-Xia
J Environ Health. 2015 Jan-Feb;77(6):28-34.
After years of irrigating farmland with wastewater, concern is increasing about health risks from heavy metals contaminating wheat grown in sewage-irrigated soils in suburban areas of Beijing, China. The study discussed in this article aimed to compare the characteristics of heavy metal distribution in a sewage-irrigated "soil-wheat" system with those from a clean-water-irrigated area by collecting and analyzing samples from both areas. The results indicated that the average concentrations of copper, chromium, lead, and zinc in sewage-irrigated soil were higher than the values in the clean-water-irrigated region. Irrigation with wastewater could lead to increased bioconcentration factors. Therefore, issues of food contamination caused by sewage irrigation deserve more attention.
在中国北京郊区，多年来一直使用废水灌溉农田，人们越来越担心重金属污染污水灌溉土壤中种植的小麦所带来的健康风险。本文所讨论的研究旨在通过收集和分析来自两个地区的样本，比较污水灌溉“土壤-小麦”系统中重金属分布特征与清水灌溉地区的特征。结果表明，污水灌溉土壤中铜、铬、铅和锌的平均浓度高于清水灌溉地区的值。用废水灌溉会导致生物富集系数增加。因此，污水灌溉引起的食品污染问题值得更多关注。
