【摘要】 铬的生物地球化学行为及生物效应研究受到了广泛重视 ,其主要有以下特征 :铬在地球和各环境及生物要素中皆有分布 ,但分布不均 ;Cr(Ⅲ )和Cr(Ⅵ )都具有毒性 ,但Cr(Ⅲ )的毒性和在环境中的迁移能力皆小于Cr(Ⅵ ) ;具有生理活性功能的是Cr(Ⅲ ) ,其生物学效应符合Bertrand最适营养浓度定律 ;适当条件下 ,Cr(Ⅲ )和Cr(Ⅵ )可以发生相互转换 ,从而实现铬在环境中的转移和富集。更多还原

【Abstract】 The study in biogeochemistry and biologic effect of chromium are regarded widely.There are some characters about them:Chromium is distributed in the earth and every environmental and biologic factors,but the content is different;The toxicity biologic effect and the mobility of Cr(Ⅲ)are weak than that of Cr(Ⅵ);Cr(Ⅲ)has biologic effect,and accord with Bertrand law about the best nutrient concentration;With suitable condition,some transitions will occure in Cr(Ⅲ)and Cr(Ⅵ),chromium is transfered and enrichement.更多还原