Determination of Competitive Adsorption and Desorption of Heavy Metals by Isotherm and Sequential Extraction Methods in Different Soil Orders in Erzurum Plain

作     者：M. Turan S. Ata A. Gunes N. Ataoglu A. Esringu O. Uzun M. Ozgul M. Y. Canbolat I. Bogdan 

作者机构：Department of Soil Science Faculty of Agriculture Atatiirk University Erzurum 25240 Turkey Department of Agrotecnica University of Agricultural Science and Veterinary Medicine Cluj-Napoca 400372 Romania 

出 版 物：《Journal of Agricultural Science and Technology》 (农业科学与技术（美国大卫英文）)

年 卷 期：2010年第4卷第6期

页      面：20-33页

学科分类：08[工学] 0815[工学-水利工程] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Adsorption desorption heavy metal sequential analysis soil order. 

摘      要：The objective of this study was to DTPA （complexion agent） and a sequential extraction procedure, and adsorption-desorption isotherm （competitive） evaluate the mobility and distribution of Fe, Zn, Mn, Cu, Cd, Ni, and Pb using the in surface samples of five soil great groups differing in their physicochemical properties. For determining heavy metal adsorption and desorption capacities of soil samples, six different concentrations （0, 2.5, 5, 10, 15 and 20 mg Lt） were used in a laboratory experiment with tree replications. An analytical procedure involving sequential chemical extractions has been used for partitioning of heavy metals into five fractions. Sorption isotherms were characterized using linear, Frendlich and Langmuir equations. The results indicated that the selective sequences of the metal adsorption based on the distribution coefficient was Pb〉Cu〉Ni〉Cd〉Zn〉Mn〉Fe and Pb, Cu, and Ni are the most strongly sorbed metals by these soils, whereas Cd, Zn and Mn are the least sorbed ones. The total adsorbed amount of these metals on the studied soils was well described by Langmuir equation. Calciorthid had the highset Pb, Cu, Ni, Cd, Zn, Mn, and Fe adsorption, and the sequences followed order Fluvaquent〉Argiustoll〉Pellustert〉Haplustept of the studied soil.