文献类型：期刊文献

英文题名：Calcium Enhances Thallium Uptake in Green Cabbage (Brassica oleracea var. capitata L.)

作者：Jia, Yanlong Xiao, Tangfu Sun, Jialong Ning, Zengping Xiao, Enzong Lan, Xiaolong Chen, Yuxiao

第一作者：贾彦龙;Jia, Yanlong

通信作者：Sun, JL[1];Xiao, TF[2]|[144401b0f946cab9b9543]孙嘉龙;

机构：[1]Hanshan Normal Univ, Sch Chem & Environm Engn, Chaozhou 521041, Peoples R China;[2]Guizhou Inst Technol, Sch Resources & Environm Engn, Guiyang 550002, Peoples R China;[3]Guangzhou Univ, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China;[4]Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China

第一机构：Hanshan Normal Univ, Sch Chem & Environm Engn, Chaozhou 521041, Peoples R China

通信机构：corresponding author), Guizhou Inst Technol, Sch Resources & Environm Engn, Guiyang 550002, Peoples R China;corresponding author), Guangzhou Univ, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China.|贵州理工学院资源与环境工程学院;贵州理工学院;

年份：2023

卷号：20

期号：1

外文期刊名：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH

收录：;WOS:【SSCI(收录号:WOS:000909956400001)，SCI-EXPANDED(收录号:WOS:000909956400001)】；

基金：This research was funded by the National Natural Science Foundation of China (41830753, 41173028, 41967041, 41563015, 41563010, 41673138, 41763010), Guizhou Provincial Key Technology Support Program (QKHZC[2021]492).

语种：英文

外文关键词：thallium-contaminated soil; calcium; green cabbage; phytoextraction; sequential extraction

摘要：Thallium (Tl) is a nonessential and toxic trace metal that is detrimental to plants, but it can be highly up-taken in green cabbage (Brassica oleracea L. var. capitata L.). It has been proven that there is a significant positive correlation between Tl and Calcium (Ca) contents in plants. However, whether Ca presents a similar role for alleviating Tl toxicity in plants remains unclear, and little is known in terms of evidence for both Ca-enhanced uptake of Tl from soils to green cabbage and associated geochemical processes. In this study, we investigated the influence of Ca in soils on Tl uptake in green cabbage and the associated geochemical process. The pot experiments were conducted in 12 mg/kg Tl(I) and 8 mg/kg Tl(III) treatments with various Ca dosages. The results showed that Ca in soils could significantly enhance Tl uptake in green cabbage, increasing 210% in content over the control group. The soluble concentrations of Tl were largely increased by 210% and 150%, respectively, in 3.0 g/kg Ca treatment, compared with the corresponding treatment without Ca addition. This was attributed to the geochemical process in which the enhanced soluble Ca probably replaces Tl held on the soil particles, releasing more soluble Tl into the soil solution. More interestingly, the bioconcentration factor of the leaves and whole plant for the 2.0, 2.5, 3.0 g/kg Ca dosage group were greatly higher than for the non-Ca treatment, which could reach 207%, implying the addition of Ca can improve the ability of green cabbage to transfer Tl from the stems to the leaves. Furthermore, the pH values dropped with the increasing Ca concentration treatment, and the lower pH in soils also increased Tl mobilization, which resulted in Tl accumulation in green cabbage. Therefore, this work not only informs the improvement of agricultural safety management practices for the farming of crops in Tl-polluted and high-Ca-content areas, but also provides technical support for the exploitation of Ca-assisted phytoextraction technology.