生物炭和腐殖酸对堆肥过程中铜、铅和镉钝化的影响。
Effect of biochar and humic acid on the copper, lead, and cadmium passivation during composting.
机构信息
Institute of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, No. 41, Maizidian Street, Chaoyang District, Beijing 100125, China; Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture, Beijing 100125, China.
Institute of Energy and Environmental Protection, Chinese Academy of Agricultural Engineering, No. 41, Maizidian Street, Chaoyang District, Beijing 100125, China; Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture, Beijing 100125, China.
出版信息
Bioresour Technol. 2018 Jun;258:279-286. doi: 10.1016/j.biortech.2018.02.086. Epub 2018 Feb 23.
In this study, two different biochars (sawdust charcoal (SDC) and wheat straw charcoal (WSC)) and biological humic acid (BHA) were used with different addition rates in pig manure composting to illustrate the effect on heavy metals passivation. And the composts were applied to rape (Brassica campestris L.) growth to illustrate the stability of the passivation. Results showed the concentration of Cu, Cd, and Pb increased after composting, whereas the passivation rates of Cu, Pb, and Cd reached a maximum of 94.98%, 65.55%, and 68.78%, respectively. When the composts were applied to rape growth, the exchangeable fraction of Cu, Pb, and Cd in the soil further decreased and reduced the accumulation of heavy metals in the rape plant. The rape yield increased by 19.39%-34.35%. The optimal addition ratios of the three passivators were SDC 5%, WSC 7.5% and BHA 2.5% to reduce the health risk of heavy metals in rape products.
在这项研究中，使用了两种不同的生物炭（木屑炭（SDC）和麦秆炭（WSC））和生物腐殖酸（BHA），并以不同的添加率应用于猪粪堆肥中，以说明其对重金属钝化的效果。然后将堆肥应用于油菜（Brassica campestris L.）生长中，以说明钝化的稳定性。结果表明， composting 后 Cu、Cd 和 Pb 的浓度增加，而 Cu、Pb 和 Cd 的钝化率分别达到了 94.98%、65.55%和 68.78%的最大值。当堆肥应用于油菜生长时，土壤中 Cu、Pb 和 Cd 的可交换部分进一步减少，降低了油菜植物中重金属的积累。油菜产量增加了 19.39%-34.35%。三种钝化剂的最佳添加比例为 SDC 5%、WSC 7.5%和 BHA 2.5%，以降低油菜产品中重金属的健康风险。
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