Deng Yun, Wang Sheng, Beadham Ian, Gao Xin, Ji Mengmeng, Wang Guang, Zhang Changbo, Ruan Wenquan
School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China.
School of Pharmacy and Chemistry, Kingston University, Kingston upon Thames KT1 2EE, UK.
Toxics. 2023 Mar 20;11(3):288. doi: 10.3390/toxics11030288.
To reduce contamination levels in Cd-contaminated paddy soil while retaining soil characteristics, we have studied the Cd-removing ability of 15 different amino acid-based ionic liquids, which are considered to be green solvents, as soil washing agents and their impact on soil. The results indicated that the glycine hydrochloride ([Gly][Cl]) removed the most Cd, and under optimized conditions could remove 82.2% of the total Cd. Encouragingly, the morphology of the soil had not been significantly changed by the washing process. After the soil was rinsed twice with water and the pH was adjusted to 6.2 by adding Ca(OH), the germination index of the rice increased by 7.5%. The growth of the rice was also stimulated, with lengths and weights of the rice plants increasing by 56% and 32%, respectively, after two weeks. These experiments demonstrate that amino-acid-derived ionic liquids can be promising soil-washing agents of Cd-contaminated paddy soil.
为了在保留土壤特性的同时降低镉污染稻田土壤中的污染水平，我们研究了15种不同的氨基酸基离子液体作为土壤清洗剂的镉去除能力，这些离子液体被认为是绿色溶剂，以及它们对土壤的影响。结果表明，盐酸甘氨酸（[Gly][Cl]）去除的镉最多，在优化条件下可以去除总镉的82.2%。令人鼓舞的是，清洗过程并未使土壤形态发生显著变化。用水冲洗土壤两次并添加Ca(OH)₂将pH值调节至6.2后，水稻的发芽指数提高了7.5%。水稻的生长也受到了促进，两周后水稻植株的长度和重量分别增加了56%和32%。这些实验表明，氨基酸衍生的离子液体有望成为镉污染稻田土壤的清洗剂。
