猪粪与农田土壤中重金属累积污染的相关分析

Correlation Analysis of Heavy Metals Accumulation Pollution in Pig Manure and Farmland Soil

为调查猪粪和农田土壤中Cu、Zn、As、Hg、Cr、Cd、Pb、Ni 8种重金属元素的累积和相关关系,文章抽取了30篇已发表文献中关于8种重金属的浓度数据进行分析。原始分析包括上海周边、浙江、江苏、福建、山东、陕西、山西、青海、北京、河南、吉林、湘江下游、河北保定、广东东莞、新疆乌鲁木齐和石河子等地,共包括超过2 000个猪粪样品和1 700个土壤样品,取其中的均值共550个进行分析。分析发现:猪粪中Cu超标最严重,Zn次之;土壤中Cu、Zn累积不多,但是多来自猪粪;土壤中Cd超标最为严重,其次为Cr,且主要污染源不是来自猪粪。

30 published references were used to analyze the accumulation and correlation of heavy metal contents in pig manure and farmland soil. The study areas in the original papers included Shanghai, Zhejiang, Jiangsu, Fujian, Shandong, Henan, Shanxi, Shaanxi, Qinghai, Beijing, Jilin, Baoding, Dongguan, Urumqi, Shihezi, and downstream of the Xiang river, a total of 550 mean values of heavy metals were analyzed from 2 000 more samples of pig manures and 1 700 more farmland soil samples included in these references. It was founded that Cu has highest over standard rate in the pig manure, then followed by Zn; but Cu and Zn were accumulated little in the farmland soil although they mainly came from pig manure. Cd had the highest over standard rate in soil, then followed by Cr, but they did not mainly come from pig manure.