Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore, 575025, India.
Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Mangalore, 575025, India.
J Environ Manage. 2022 Jan 15;302(Pt A):114057. doi: 10.1016/j.jenvman.2021.114057. Epub 2021 Nov 5.
The contamination of soil with heavy metals is known to affect the yield the soil fertility, which in turn affects the growth of agricultural crops. This study investigates the role of coconut shell biochar (CSB) and earthworms (Eudrilus euginea) in the bioremediation and growth of Palak spinach (Spinacia oleracea L.) in cadmium (Cd) contaminated soil. The soils were amended with different combinations of CSB and earthworms and incubated for 35 days. Later, the soil samples were analyzed for the changes in the soil properties, soil enzyme activity, and heavy metal contents. It is observed that the treatments with both CSB and earthworms resulted in the improvement of soil properties and soil enzyme activity which was directly related to soil fertility. Meanwhile, the maximum removal of 94.38% of total Cd content in the soil was obtained for the soil sample contain both CSB and earthworms. The improved soil properties resulted in a higher germination percentage of Spinacia oleracea L. seeds in the Cd contaminated soil.
土壤重金属污染已知会影响土壤肥力，进而影响农业作物的生长。本研究探讨了椰子壳生物炭（CSB）和蚯蚓（Eudrilus euginea）在生物修复和镉（Cd）污染土壤中菠菜（Spinacia oleracea L.）生长中的作用。土壤中添加了不同比例的 CSB 和蚯蚓，并培养了 35 天。随后，对土壤样品进行分析，以了解土壤特性、土壤酶活性和重金属含量的变化。结果表明，同时添加 CSB 和蚯蚓的处理可改善土壤特性和土壤酶活性，这与土壤肥力直接相关。同时，在含有 CSB 和蚯蚓的土壤样本中，土壤中总 Cd 含量的去除率达到了 94.38%。改良后的土壤特性使菠菜（Spinacia oleracea L.）种子在 Cd 污染土壤中的发芽率更高。
