重金属(HMs)污染是一个严重的问题,由于它们对作物产量的毒性作用,作物质量,土壤环境,和人类健康。在目前的研究中,碳酸钙(CC)的四种稳定剂,白云石(DL),沸石(ZL),和钢渣(SS)作为原位化学修复技术以及原位物理修复技术(即土壤覆盖(SC)和土壤稀释(SD))应用于镉(Cd)和铅(Pb)污染的土壤。三年来,在改良的田地上种植大白菜(BrassicarapaL.),以研究改良对植物中Cd和Pb吸收的影响。SS的稳定效率,CC,SC为75.7%,66.0%,和71.1%,分别,对于Cd,55.6%,55.6%,70.0%,分别,对于Pb。结果表明,稳定剂土壤改良剂显着降低了Cd和Pb的可交换(F1)和碳酸盐结合(F2)分数。例如,Cd的F1含量从10.2(对照)降至1.8-2.9%(使用稳定剂)。稳定剂使大白菜干重增加11.4-22.5%,Cd和Pb吸收减少67.4%和24%,分别。结果表明,原位化学修复技术取得了良好的效果,并保持了130周以上的效率。目前的研究表明,化学修复Cd和Pb污染土壤比物理修复更有效,持续时间更长。
Soils pollution with heavy metals (HMs) is a serious concern due to their toxic effects on crop yield, crop quality, soil environment, and human health. In the current
study, four
stabilizers of calcium carbonate (CC), dolomite (DL), zeolite (ZL), and steel slag (SS) were applied to cadmium (Cd) and lead (Pb)-contaminated soils as in-situ chemical remediation techniques along with in-situ physical remediation techniques i.e. soil covering (SC) and soil dilution (SD) under real field conditions. For three years, Chinese cabbage (Brassica rapa L.) was grown on the amended fields to examine how the amendments impacted Cd and Pb uptake in plants. The stabilization efficiency of SS, CC, and SC were 75.7 %, 66.0 %, and 71.1 %, respectively, for Cd, and 55.6 %, 55.6 %, and 70.0 %, respectively, for Pb. Results indicated that stabilizer soil amendments significantly decreased the exchangeable (F1) and carbonates bound (F2) fractions of both Cd and Pb. For instance, F1 fraction of Cd decreased from 10.2 (control) to 1.8-2.9 % (with
stabilizers). The
stabilizers increased Chinese cabbage dry weight by 11.4-22.5 % and decreased Cd and Pb uptake by 67.4 % and 24 %, respectively. The results demonstrated that in-situ chemical remediation technique showed promising results and maintained its efficiency for more than 130 weeks. Current
study indicated that chemical remediation of Cd and Pb contaminated soil is more effective and last longer than physical remediation.