论文部分内容阅读
通过调查采样及室内检测的方法,分析上海市商品有机肥料样品331个,就重(类)金属含量情况和影响因素展开研究。结果表明:重(类)金属Cu、As、Cd、Cr、Pb和Hg的含量变化较大,从痕量到1 000 mg/kg均有,平均值分别为262.12、21.00、2.44、38.49、6.22 mg/kg和0.37 mg/kg,超标率依次为55.59%、15.71%、5.14%、0.03%、0和0。物料影响方面,以猪粪作为原料的有机肥料超标情况较多,猪粪有机肥的铜和砷含量偏高,鸡粪有机肥料的砷和镉超标较多。当有机肥料偏碱性时,发生重金属超标几率提高,特别是当8≤pH<9时,Cu、As和Cd分别占总超标个数的54.35%、55.77%和47.06%,Cd在pH<8时,没有发生超标的现象。
A total of 331 samples of commercial organic fertilizers in Shanghai were analyzed by means of survey sampling and indoor testing. The metal content and influencing factors of heavy metals were studied. The results showed that the contents of Cu, As, Cd, Cr, Pb and Hg in heavy metal varied greatly from trace to 1 000 mg / kg with average values of 262.12, 21.00, 2.44, 38.49 and 6.22 mg / kg and 0.37 mg / kg respectively. The over standard rates were 55.59%, 15.71%, 5.14%, 0.03%, 0 and 0 respectively. In terms of materials, organic manure with pig manure as the raw material exceeded the standard. There was a high level of copper and arsenic in pig manure and arsenic and cadmium in manure organic manure exceeded the standard. When organic fertilizers were alkaline, the chances of exceeding the standard were increased. Especially for 8≤pH <9, Cu, As and Cd accounted for 54.35%, 55.77% and 47.06% When there is no over-standard phenomenon.