We investigated the effects of UiO-66-SH on the growth and development of hydroponically grown Brassica chinensis under different concentrations of arsenic(As)and cadmium(Cd)stress. By measuring indicators such as the biomass of Pakchoi, the level of heavy metal enrichment, the content of malondialdehyde(MDA). and the activities of antioxidant enzymes, the adsorption mechanism of UiO-66-SH towards the combined pollution of arsenic and cadmium was analyzed.The results showed that the fresh and dry weights of both above-ground and below-ground parts of Brassica chinensis decreased with- DOI:10.3969/j.issn.1000-1565.2025.03.006砷镉胁迫下UiO-66-SH对水培小白菜生长发育的影响王焱1,陈芯怡1,张凌荔1,王鑫宇2,何铁光3,张拓2(1.西华师范大学 环境科学与工程学院,四川 南充 637000;2.南宁师范大学 环境与生命科学学院,广西 南宁 530001; 3. 广西农业科学院 农业资源与环境研究所,广西耕地保育重点实验室,广西 南宁 530007)摘 要:本文对砷(As)镉(Cd)胁迫下,UiO-66-SH对水培小白菜生长发育的影响进行了研究.通过测定小白菜的生物量、重金属富集水平、丙二醛(MDA)含量及抗氧化酶活性等指标,分析了UiO-66-SH对As、Cd复合污染的吸附机制.结果表明:随着As和Cd浓度的升高,小白菜地上部分和地下部分的鲜质量与干质量均有所下降,而UiO-66-SH的添加使下降趋势明显减弱.此外,UiO-66-SH添加后还促进了小白菜根长、株高及叶片展幅的生长,尤其在低质量浓度组处理下更为显著;在重金属富集方面,UiO-66-SH对水体中的As和Cd显示出良好的吸附性能,低质量浓度组和高质量浓度组中,小白菜对Cd的吸附率分别为69.5%和60.2%,对As的吸附率分别为71.1%和63.1%,显著降低了小白菜对As和Cd的吸收和富集,从而减少了重金属对小白菜的毒害作用;此外,UiO-66-SH通过降低MDA含量及SOD、POD、CAT、APX活性,缓解了氧化损伤,并且UiO-66-SH通过Zr—O—H和S—H键与As、Cd的络合作用,在材料表面形成了更加稳定的Zr—O—As和S—Cd键,从而实现了同步去除.研究表明,UiO-66-SH在缓解As和Cd胁迫对小白菜生长发育的抑制作用方面具有显著效果,是一种具有广阔应用前景的环境功能材料.关键词:砷镉胁迫;UiO-66-SH;小白菜;重金属吸附中图分类号:A53 文献标志码:A 文章编号:1000-1565(2025)03-0278-11Effects of UiO-66-SH on the growth and development of Brassica chinensis under arsenic and cadmium stresses in water-planting condition WANG Yan1, CHEN Xinyi1, ZHANG Lingli1, WANG Xinyu2, HE Tieguang3, ZHANG Tuo2(1.College of Environmental Science and Engineering, China West Normal University, Nanchong 637000, China; 2.School of Environment and Life Science, Nanning Normal University, Nanning 530001, China; 3. Guangxi Key Laboratory of Arable Land Conservation, Agricultural Resources and Environmental Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China)Abstract: We investigated the effects of UiO-66-SH on the growth and development of hydroponically grown Brassica chinensis under different concentrations of arsenic(As)and cadmium(Cd)stress. By measuring indicators such as the biomass of Pakchoi, the level of heavy metal enrichment, the content of malondialdehyde(MDA). and the activities of antioxidant enzymes, the adsorption mechanism of UiO-66-SH towards the combined pollution of arsenic and cadmium was analyzed.The results showed that the fresh and dry weights of both above-ground and below-ground parts of Brassica chinensis decreased with- 收稿日期:2024-09-05;修回日期:2024-11-18 基金项目:广西耕地保育重点实验室开放课题(23-026-12-24KF3);国家重点研发计划课题(2023YFD1902400-02) 第一作者:王焱(1999—),女,西华师范大学在读硕士研究生,主要从事土壤重金属研究.E-mail:threefire72@163.com 通信作者:张拓(1990—),男,南宁师范大学副教授,主要从事水环境化学方向研究. E-mail:xiaotuodujiang@126.com 第3期王焱等:砷镉胁迫下UiO-66-SH对水培小白菜生长发育的影响河北大学学报(自然科学版) 第45卷the increase of As and Cd concentrations, while the decreasing trend was significantly weakened by the addition of UiO-66-SH. In addition, the addition of UiO-66-SH also promoted the growth of Brassica chinensis root length, plant height and leaf spreading, especially in the low concentration of the treatment was more significant; in heavy metal enrichment, UiO-66-SH showed good adsorption performance on As and Cd in the water body, the adsorption rate of Cd reached 69.5% and 60.2% in the low and high concentration treatments, respectively, the adsorption rate of As reached 71.1% and 63.1%, this adsorption significantly reduced the absorption and enrichment of As and Cd in Brassica chinensis, thus reducing the toxic effects of heavy metals on Brassica chinensis; Furthermore, UiO-66-SH alleviated oxidative damage by reducing the content of MDA and the increases in the activities of superoxide dismutase(SOD), peroxidase(POD), catalase(CAT), and ascorbate peroxidase(APX). The results indicated that the synchronous adsorption process of UiO-66-SH on arsenic and cadmium is mainly through the action of Zr—O—H and S—H bonds, and through the way of ligand complexation, more stable Zr—O—As and S—Cd bonds are formed on the surface of the material, thus achieving synchronous removal. In summary, the present study demonstrated that UiO-66-SH has a significant effect in alleviating the inhibitory effects of As and Cd stress on the growth and development of Brassica chinensis, and it is a kind of environmentally functional material with promising applications in the future.
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