山西漳泽水库淤泥资源利用的分析与评价

Analysis and Appraisal to Silt Resources of Zhangze Reservoir in Shanxi

通过对漳泽水库沉积40余年淤泥的6种重金属含量和淤泥养分含量分析,并对淤泥重金属进行单因子评价和多因子综合评价以及对淤泥养分含量评价的结果可知,淤泥重金属单因子评价Pi<1,属清洁级,淤泥重金属多因子综合评价Pi<0.7,属安全、清洁级,该淤泥在农业上的使用符合无公害要求。该淤泥有机质含量很高,有机质占Ⅰ级的百分率达到100%,有效钾含量占Ⅰ级的百分率达到80%,此外淤泥还含有一些氮、磷等速效养分,可用于制作肥料和改良低产土壤,也可在园林、花卉、绿地上使用。

The test analyzed five kinds heavy metals content in silt that has deposited more than 40 years in Zhangze reservoir and evaluated them by single-factor and multifactor ways. The results showed the Pi value of single-factor evaluating of heavy metals pollution was less than 1 ,and it belonged to cleanness grade. In multifactor comprehensive evaluation, the comprehensive value of Pi of superstratum of only two sampling point and superstratum and substratum of one sampling point were surpassed 1 ,so they belonged to lightly pollution. The heavy metal pollution value of other sampling point all accorded to the need of non-pollution microorganism fertilizer. The percent that OM content was Ⅰ grade attained 88.6%, the percent that the sum of A-N and A-P content belonged to Ⅰ grade and Ⅱ grade was more than 90%, the percent that A-K content belonged to Ⅰ grade was 66.7 %, and that the pH value presented neuter leaning alkalescence. These indicated the silt resources can be used in soil improvement or making fertilizer, to the minority sampling point that polluted lightly by heavy metal , the silt can be used for horticulture, flower, greenbelt and ceramics.