College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
Department of Agroforestry and Environmental Science, Sylhet Agricultural University, Sylhet 3100, Bangladesh.
Molecules. 2020 Apr 1;25(7):1617. doi: 10.3390/molecules25071617.
A greenhouse pot trial was conducted to investigate the effect of organic amendments combined with triple superphosphate on the bioavailability of heavy metals (HMs growth and metal uptake from Pb-Zn mine tailings. Cattle manure compost (CMC), spent mushroom compost (SMC) and agricultural field soil (AFS) were applied to tailings at 5%, 10%, 20% and 30% / ratio, whereas sewage sludge (SS) and wood biochar (WB) were mixed at 2.5%, 5%, 10% and 20% / ratio. Triple superphosphate (TSP) was added to all the treatments at 4:1 (molar ratio). Amendments efficiently decreased DTPA-extracted Pb, Zn, Cd and Cu in treatments. Chlorophyll contents and shoot and root dry biomass significantly (< 0.05) increased in the treatments of CMC (except T4 for chlorophyll b) and SMC, whereas treatments of SS (except T1 for chlorophyll a and b), WB and AFS (except T4 for chlorophyll a and b) did not show positive effects as compared to CK1. Bioconcentration factor (BCF) and translocation factor (TF) values in plant tissues were below 1 for most treatments. In amended treatments, soluble protein content increased, phenylalanine ammonialyase (PAL) and polyphenol oxidase (PPO) decreased, and catalase (CAT) activity showed varied results as compared to CK1 and CK2. Results suggested that can be a potential metal phytostabilizer and use of CMC or SMC in combination with TSP are more effective than other combinations for the in situ stabilization of Pb-Zn mine tailings.
采用温室盆栽试验研究了有机改良剂与过磷酸钙对重金属（HM）生物有效性的影响，探讨了添加到 Pb-Zn 矿山尾矿中的生长和金属吸收情况。牛粪堆肥（CMC）、废蘑菇堆肥（SMC）和农业土壤（AFS）分别以 5%、10%、20%和 30%/比例，而污水污泥（SS）和木生物炭（WB）以 2.5%、5%、10%和 20%/比例添加到尾矿中。所有处理均添加 4：1（摩尔比）的过磷酸钙。改良剂有效地降低了 DTPA 提取的 Pb、Zn、Cd 和 Cu。除 T4 叶绿素 b 外，CMC 和 SMC 处理的叶绿素含量以及茎叶干生物量均显著（<0.05）增加，而 SS（除 T1 叶绿素 a 和 b 外）、WB 和 AFS（除 T4 叶绿素 a 和 b 外）处理与 CK1 相比没有表现出积极的效果。植物组织中的生物浓缩因子（BCF）和转移因子（TF）值均低于 1。在改良处理中，可溶性蛋白质含量增加，苯丙氨酸氨裂解酶（PAL）和多酚氧化酶（PPO）减少，而过氧化氢酶（CAT）活性与 CK1 和 CK2 相比表现出不同的结果。结果表明，在原位稳定 Pb-Zn 矿山尾矿方面，与 CK1 和 CK2 相比，可作为一种潜在的金属植物稳定剂，且 CMC 或 SMC 与 TSP 联合使用比其他组合更有效。
