Adsorption and Uptake of Cadmium by Azolla pinnata:Kinetics of Inhibition by Cations

作     者：J.P.GAUR N.NORAHO J. P. GAUR (Laboratory of Algal Biology, Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221005, India)N. NORAHO(Botany Department,Science College, Kohima 797002, India)

作者机构：LaboratoryofAlgalBiologyCentreofAdvancedStudyinBotanyBanarasHinduUniversityVaranasi221005India Bo 

出 版 物：《Biomedical and Environmental Sciences》 (生物医学与环境科学（英文版）)

年 卷 期：1995年第8卷第2期

页      面：149-157页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 1001[医学-基础医学(可授医学、理学学位)] 07[理学] 08[工学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

主　　题：Adsorption and Uptake of Cadmium by Azolla pinnata 

摘      要：A. pinnata showed a remarkable ability of taking up Cd from the external medium. Of the total Cd taken up by the test plant, surface adsorption was about 90%. Cd adsorption did not occur at a constant rate, however, an equilibrium was reached in 2 h. The uptake of Cd occurred at a constant rate. Test cations, including heavy metals (Ca, Mg, K, Na,Ni, Fe, Cu and Zn), inhibited adsorption as well as uptake of Cd. Cd adsorption was competitively inhibited by Cu, Fe and Zn, whereas Ca, Mg, K, Na and Ni caused non-competitive inhibition. Similarly, Cd uptake was competitively (Ca, Mg, Fe) or non-competitively (Na, K, Ni, Zn) inhibited by cations. Inhibition of Cd uptake by Cu was not wholly competitive