玉米叶片对不同粒径降尘中重金属的富集特征

打开文本图片集

中图分类号：S513；X513；X173 文献标志码：A 文章编号：1672-2043（2025）09-2234-11 doi：10.11654/jaes.2024-0809

Abstract：Toivestigatehowtheparticlesizefectstheaborptionofheayetalsbycropleaves，weconductedanexposureexpint onmaizeleavesbysimulatingatmospricdustfalfromminingreasoiltoaalyethetsofparticleszesongrowhandayetals accumulationinmaizeseedlings.Theresultsshowedthatatthearlystageofmaizegrowth，smallparticlessignificantlyinhbitedmaize plant height and aboveground biomass.Additionally，under the exposure treatment of large particle size （ <2mm ），maize leaveshad the highestretentiorateofhavymetalsinparticulatemater.Thecontentsofcadmiu（Cd），arseic（As），lead（Pb），zinc（Zn）adpr （Cu）inheabovegroundpartsofmaetreatedithdustfallwere4.05-45，.42-.58，11.05-9.61，2.50-4.12tsand1.44 timeshigerthantoseoftheontrol，espectively.Havetalsinmospericparticulateatercanbetansferedfrooldavsto newleaveaferbeingabsorbedbymaize.ThecontentsofCd，As，Pb，ZnandCuderivedfromatmosphericparticulate materinthenew leaveswere1.20，1.53，1.11，1.11timesand0.56timeshigherthanthoseintheoldleaves.Moreover，scaingelectronmicosoe observationsrevealedthatparticlescontainingheavymetalstendtogatheraroundthestomataofmaizeleaves，furterconfirmingthat maizecanuptakeheavymetalsbyinterceptingatmospericparticulatesonleaves.Thisstudysugests tattheparticlesizesigiicantly affects the interception and adsorption of particulate matterand the absorption of heavy metals by corn leaves.

Keywords ：dustfall; contaminant transport; mining area; heavy metal enrichment

近年来，随着经济水平的迅猛增长和工业化、城市化的快速发展，大量来自矿山开采、金属冶炼等工业活动以及汽车尾气排放、轮胎磨损等交通运输领域的重金属污染物被排放到大气环境中。（剩余24635字）