Deng Rui, Zhan Xinyuan
School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, PR China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui 230009, PR China.
School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, PR China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui 230009, PR China.
J Hazard Mater. 2023 Mar 5;445:130484. doi: 10.1016/j.jhazmat.2022.130484. Epub 2022 Nov 24.
A novel lactonic sophorolipid (LS) self-assembled nano-chlorapatite (LS-nClAP) was prepared for the immobilization of severe cadmium (Cd) in sediment. The experimental results indicated that the introduction of LS not only improved the dispersed performance of chlorapatite, but also brought massive hydroxyl and carboxyl groups, which significantly improved the immobilization efficiency of Cd and reduced its eco-toxicity in sediment. LS can significantly increase the effective utilization rate of phosphorus in chlorapatite, and reduce the content of available phosphorus (AP) by half after remediation compared with ClAP. Additionally, the participation of LS possessed a significant impact on the enzyme activities in the sediment, especially for urease, which was closely related to the effective stability of Cd and the introduction of LS. All experimental results of this study provided new insights into the possible effects of Cd immobilization by chlorapatite in contaminated sediments, demonstrating great application potential for sediment remediation in the future.
制备了一种新型内酯槐糖脂（LS）自组装纳米氯磷灰石（LS-nClAP）用于固定沉积物中的重金属镉（Cd）。实验结果表明，LS的引入不仅提高了氯磷灰石的分散性能，还带来了大量的羟基和羧基，显著提高了沉积物中Cd的固定效率并降低了其生态毒性。LS能显著提高氯磷灰石中磷的有效利用率，与氯磷灰石（ClAP）相比，修复后有效磷（AP）含量降低了一半。此外，LS的参与对沉积物中的酶活性有显著影响，尤其是与Cd的有效稳定性和LS的引入密切相关的脲酶。本研究的所有实验结果为氯磷灰石固定污染沉积物中Cd的可能效果提供了新的见解，表明其在未来沉积物修复中具有巨大的应用潜力。
