常见植物对重金属铊吸收特征研究  

Study on heavy mental thallium biosorption by common plants

作　　者：张福祎 姚焱[1] 张平[2] 刘文峰[2] 耿新华[2] 黎秀苑 刘芳 ZHANG Fu-yi;YAO Yan;ZHANG Ping;LIU Wen-feng;GENG Xin-hua;LI Xiu-yuan;LIU Fang(College of Life Sciences,Guangzhou University,Guangzhou 510006,China;College of Chemical and Chemical Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学生命科学学院,广东广州510006 [2]广州大学化学化工学院,广东广州510006

出　　处：《广东农业科学》2018年第4期100-105,共6页Guangdong Agricultural Sciences

基　　金：国家自然科学基金(41373118);广东省科技计划项目(2015A020209191)

摘　　要：利用水培试验方法,考察了4种常见植物对重金属铊两种价态Tl^+和Tl^(3+)的吸收速率、铊富集量,植物体内铊价态存在形式及K+影响Tl^+和Tl^(3+)在植物中的富集。结果表明,植物对Tl^+和Tl^(3+)的吸收速率与铊富集量在不同植物中表现不同。肾蕨表现出对Tl^+和Tl^(3+)的最大吸收速率,分别为0.004、0.007 mg/g·h。狐尾藻对Tl^(3+)的铊富集量最大,为681.97 mg/kg(DW);甘蓝对Tl^+的铊富集量最大,为473.30 mg/kg(DW)。植物对两种价态铊的吸收富集主要集中在根部。植物根部的铊价态分析表明,通过根系吸收进入植物体内的铊都以Tl^+为主要存在形式。当Tl^+/Tl^(3+)与K+比例为1∶25时,K+对Tl^+和Tl^(3+)都具有拮抗抑制作用,可以影响植物对Tl^+和Tl^(3+)的富集。In this study,hydroponic experiments were conducted to investigate the uptake rates and accumulation of thallium （Tl^＋ and Tl^3＋） in four types of plants and the effect of K＋ on accumulation of Tl^＋ and Tl^3＋ in plant. The results showed that the uptake rates and accumulation contents of two thallium valence states were different. Nephrolepis auriculata had he greast uptake rates for Tl^＋ and Tl^3＋,which were 0.004 mg/g·h and 0.007 mg/g·h,respectively. The maximum accumulation of Tl^3＋ in watermifoil was 681.97 mg/kg（DW）,and the maximum accumulation of Tl^＋ in cabbage was 473.30 mg/kg（DW）. The uptake and accumulation of two valences were mainly concentrated in the roots. The valence state in plant roots was Tl^＋. When the ratio of Tl^＋/Tl^3＋ to K＋ were 1∶25,K＋ had an antagonistic inhibitory effect on the uptake of Tl^＋ and Tl^3＋,which could restrain the accumulation of thallium（Tl^＋ and Tl^3＋）in plants.

关 键 词：铊 铊价态 铊富集 甘蓝 钾 

分 类 号：X173[环境科学与工程—环境科学]