生态学杂志2025，Vol.44Issue(4)：1226-1235,10.DOI:10.13292/j.1000-4890.202504.037
生菜对两种锌矿物源重金属污染土壤中镉锌的吸收性
Cadmium and zinc uptake by lettuce(Lactuca sativa L.)from soil contaminated by two kinds of zinc mi-nerals
摘要
Abstract
The exploitation of zinc mines has led to a continuous influx of metals into soils through mining and smel-ting,resulting in the risks of excessive metal concentration in crops.Compared with that in non-mining areas,me-tals in soils around mines mainly exist in particulate form,releasing metal ions and metal-bearing nanoparticles with different bioavailability.With a pot experiment,we investigated the effects of Zn-mineral-derived cadmium(Cd)and Zn from typical zinc(Zn)-sulphide mineral(sphalerite,SP)and-oxy-salt mineral(smithsonite,SM)on the growth of lettuce(Lactuca sativa L.),the available content of Cd and Zn in soil,and Cd and Zn uptake by lettuce.The results showed that:(1)The addition of 0.1％and 1.0％SM significantly inhibited lettuce growth(P＜0.05),with a reduction of 81.2％in fresh weight under the latter addition,whereas SP addition had no significant effect on lettuce growth(P＞0.05).(2)CaCl2-and EDTA-extractable Cd and Zn in the soil significantly increased with SM addition but showed no response to SP addition.SM-spiked soils had significantly higher CaCl2-and EDTA-extract-able Cd and Zn concentrations and higher Zn/Cd molar fractions than those in SP-spike soils.(3)The total amount of Cd and Zn in the lettuce shoot increased and decreased with a higher addition amount of Zn mineral in SP-and SM-treatment,respectively.The total amount of Cd and Zn in the lettuce shoot of the SM treatment was significantly higher than that of the SP treatment.(4)The results of transmission electron microscopy combined with energy-dis-persive X-ray spectroscopy(TEM-EDS)showed that Cd-and Zn-bearing nanoparticles occurred in lettuce shoots under both Zn mineral-spiked treatments.The mechanism underlying the formation of these nanoparticles needs to be considered in further work.This study provides a new perspective for assessing the risk of heavy metal uptake in soil and crops from different lead-zinc mining areas.关键词
闪锌矿/菱锌矿/生菜/颗粒态金属Key words
sphalerite/smithsonite/Lactuca sativa L./particulate metal引用本文复制引用
潘霞,曹心妍,刘娟,李欣阳,吴龙华,倪才英..生菜对两种锌矿物源重金属污染土壤中镉锌的吸收性[J].生态学杂志,2025,44(4):1226-1235,10.基金项目
2023年度高校国内访问学者"教师专业发展项目"(FX2023141)和国家自然科学基金项目(U2002210)资助. （FX2023141）
