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1、第24卷第4期生態(tài)學(xué)報(bào)Vo.l24,No.42004年4月ACTAECOLOGICASINICAApr.,2004土壤砷污染對(duì)蔬菜砷含量及食用安全性的影響1,22*22221蔡保松,陳同斌,廖曉勇,謝華,肖細(xì)元,雷梅,張國(guó)平(1.浙江大學(xué)農(nóng)業(yè)與生物技術(shù)學(xué)院,杭州310029;2中國(guó)科學(xué)院地理與資源研究所環(huán)境修復(fù)室,北京100101)摘要:對(duì)湖南郴州砷污染區(qū)的土壤和蔬菜砷含量進(jìn)行了研究,結(jié)果表明該地區(qū)土壤含砷量為19.5～237.2mg/kg、平均為63.9mg/kg、中值為47.8mg/kg,比全國(guó)平均土壤含砷量(9.2mg/kg)高2～25倍;蔬
2、菜可食部分砷含量范圍為0.04～2.64mg/kg、平均為0.74mg/kg、中值為0.54mg/kg,54%的蔬菜可食部分含砷量超過(guò)了《蔬菜衛(wèi)生標(biāo)準(zhǔn)》規(guī)定的最大允許量(MPC≥0.5mg/kg);菠菜,茼蒿和生菜可食部分超標(biāo)比較嚴(yán)重,最大砷含量超出MPC5倍左右。關(guān)鍵詞:砷;蔬菜;污染;安全;土壤ArsenicconcentrationsinsoilsandvegetablesandtheirriskassessmentsinhighlycontaminatedareainHu'nanProvince1,222222CAIBao-Song,CHE
3、NTong-Bin,LIAOXiao-Yong,XIEHua,XIAOXi-Yuan,LEIMei,ZHANG1Guo-Ping(1CollegeofAgricultureandBiotechology,ZhejiangUniversity,Hangzhou,310029;2LaboratoryofEnvironmentalRemediation,InstituteofGeographicSciencesandNaturalResourcesResearch,ChineseAcademyofSciences,Beijing100101).ActaE
4、cologicaSinica,2004,24(4):711～717.Abstract:Contaminationofsoilsbyarsenic(As)resultsfrommining,smeltingofsulfideores,pesticides,timberpreservationandAs-richgroundwaters.Arseniccontaminatedsoils,sedimentsandsludgesaremajorsourcesofcontaminationinthefoodchainsandwatersupplies.The
5、uptakeofarsenic(As)byvegetablesfromcontaminatedsoilspresentsahealthhazardthatmayaffecttheuseofagriculturalland.ContaminationoffoodsbyAsremainsapossibledangerunderlongtimeconsumer.WithintheHunanProvince,GuiyangandShimencountycontainthelargestnumbersofpeoplelivinginproximitytosu
6、lfideores,containingAs.Becauseoftheseorebodiesandminingactivityforover1500years,highAsconcentrationsinsoilarenotexceptional.SoilAsconcentrations>200mg/kgoccuron54kmoftheregion.TheeffectsonAsbioavailabilitywereassessedusingarangeofvegetablesgrowninthefield.Fourlocationswereused
7、,wheresoilwascontaminatedbyAsfromdifferentsources.Sweetpotato,lettuce,potato,radishandspinachetal.weregrownatthemostcontaminatedsitewithameanof64mg/kgintheclayloam.ArsenicconcentrationsinsoilsandvegetablescollectedfromChenZhouCity,HunanProvince,wereinvestigatedinthispaper.Ther
8、esultsshowedthatAsconcentrationsinthesoilswere19.5～327.2mg/kg
