摘要
采集珠三角某地区近郊6块典型菜地的不同叶菜,分别进行清洗和不清洗处理。结果表明,叶菜中Pb、Cd、Hg、Cr、As的含量表现为不清洗处理大于清洗处理,经t检验发现,清洗和不清洗处理对叶菜Pb、Cr含量的影响达显著水平(P<0.05)。叶菜清洗后,Pb、Cr、As的去除率高,分别达到50%、75.4%和42%;而Cd、Hg的去除率较低,分别为11%和14.6%。表明清洗有利于减小叶菜附着污染物中的重金属含量,从而降低叶菜重金属进入食物链的风险。
Leafy vegetables were sampled from the suburban in the Pearl River Delta Region,South China,of which heavy metals(Pb,Cd,Hg,Cr,As)in the washed and unwashed shoots were determinated,and the effects of washing were discussed.The results showed that the heavy metals concentrations of leafy vegetables unwashed were higher than that washed,and the Pb,Cr concentrations reached notable leave(P〈0.05).After washing,the Pb,Cd,Hg,Cr,as concentrations of leafy vegetables removal rate were 50%,11%,14.6%,75.4% and 42%,respectively.The experimental results indicated that washing was effective in removing the heavy metals concentrations on leafy vegetables,and was effective in depressing the risk that heavy metals moving in food chain.
出处
《广东农业科学》
CAS
CSCD
北大核心
2010年第8期244-245,272,共3页
Guangdong Agricultural Sciences
基金
国家科技支撑计划项目(2007BAD89B14)
广东省社会发展项目(2007A032303001
2008A030202002)
广东省重大科技专项(2007B080401019
2008A080401008)
关键词
清洗
叶菜
重金属
去除率
washing
leafy vegetable
heavy metal
removal rate