不同类型生物炭对污染土壤中重金属生物有效性及形态的影响。
Bioavailability and Speciation of Heavy Metals in Polluted Soil as Alleviated by Different Types of Biochars.
机构信息
Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, Zhejiang, People's Republic of China.
Department of Biotechnology, Quaid-i-Azam University, Islamabad, Pakistan.
出版信息
Bull Environ Contam Toxicol. 2020 Apr;104(4):484-488. doi: 10.1007/s00128-020-02804-1. Epub 2020 Feb 25.
Biochar is an important material for remediation of contaminated soils, however, different biochars have variable effects on bioavailability of heavy metals. This experiment revealed that peanut shell biochar (PSB) has highest reduction of 78% concentration of Pb in plant roots. The maize straw biochar (MSB) has significantly decreased Zn and Cd concentration (mg/kg dry weight) in Chinese cabbage than other treatments of biochars. The plants of Chinese cabbage have exhibited an efficient transport capability for Zn and Cd. The biochars have reduced exchangeable form of Cd/Zn, enhanced residual heavy metals, and consequently diminished accumulation of heavy metals in plants. The straw block biochar (SBB), PSB and MSB have efficiently relieved the stresses of heavy metals in plants.
生物炭是修复污染土壤的重要材料，但不同的生物炭对重金属的生物有效性有不同的影响。本实验表明，在植物根部，相比其他生物炭处理方式，花生壳生物炭（PSB）能将 Pb 的浓度降低 78%。与其他生物炭处理方式相比，玉米秸秆生物炭（MSB）显著降低了小白菜体内 Zn 和 Cd 的浓度（mg/kg 干重）。小白菜植物对 Zn 和 Cd 表现出了高效的转运能力。生物炭降低了 Cd/Zn 的可交换形态，增加了重金属的残留量，从而减少了重金属在植物体内的积累。秸秆块状生物炭（SBB）、PSB 和 MSB 有效地缓解了植物的重金属胁迫。
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