摘要
通过向Cd污染土壤施加含不同比例生物炭、凹凸棒石、硅藻土的钝化材料,对比分析三种材料不同比例时对土壤Cd的钝化效果差异。结果表明,三种材料都能降低土壤中有效Cd的含量,随着三种材料添加比例的增加,土壤有效Cd的钝化率不断增加,空心菜Cd含量较空白样降低5.29%~57.21%,其中ATBS5%处理显著降低空心菜Cd含量,降幅达57.21%;同时钝化剂的施加减小了空心菜Cd的生物吸收系数,减少了植物对Cd吸收以及地下部分向地上可食用部分的转移,显著降低了空心菜可食用部分重金属含量。另一方面施加钝化材料均可提高作物产量,改善土壤肥力。对比三种材料修复钝化效果,ATBS 5%更适合应用于农田土壤修复。
By applying passivation materials with different proportions of biochar,attapulgite,and diatomite to Cd-contaminated soil,the difference in passivation effects of the three materials with different proportions on soil Cd was compared and analyzed.The results show that the three materials can reduce the content of available cadmium in the soil.With the increase in the proportion of the three materials,the passivation rate of the available cadmium in the soil continues to increase,and the cadmium content of water spinach decreases by 5.29%~57.21%than original soil.ATBS5%treatment significantly reduces the Cd content of water spinach by 57.21%.At the same time,the application of passivation agent reduces the biological absorption coefficient of water spinach Cd,reduces the absorption of Cd by plants and the transfer of underground parts to the above-ground edible parts,and significantly reduces the heavy metals in the edible parts of water spinach content.On the other hand,applying passivation materials can increase crop yields and improve soil fertility.Comparing the passivation effects of the three materials,ATBS5%is more suitable for farmland soil restoration.
作者
王美华
Wang Meihua(Zhejiang Geological Prospecting Institute of CCGMB,Hangzhou,Zhejiang,310002,China)
出处
《化工矿产地质》
CAS
2021年第1期47-53,共7页
Geology of Chemical Minerals
基金
中化地质矿山总局“土地质量调查与污染防治团队建设计划”项目
浙江省常山县土地质量调查项目。
