Single and Sequential Extraction of Copper by Different Extractants from Different Peat Soil Samples of Bangladesh  

作　　者：Ishrat Jahan Sanchary Tania Akter Ishrat Jahan Sanchary;Tania Akter(Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh;Department of Soil, Water and Environment, University of Dhaka, Dhaka, Bangladesh)

机构地区：[1]Department of Soil and Environmental Sciences, University of Barishal, Barishal, Bangladesh [2]Department of Soil, Water and Environment, University of Dhaka, Dhaka, Bangladesh

出　　处：《Open Journal of Soil Science》2021年第12期611-627,共17页土壤科学期刊（英文）

摘　　要：A comprehensive<em> in vitro</em> study on single and sequential extraction methods for Cu exraction by different extractants of distinct chemical nature from some peat soils of Bangladesh was conducted to assess the pattern of metal-extractability in drying and wetting sequences. Samples were collected from peat basins of two different districts of Bangladesh (Gopalgonj and Bagerhat) and an incubation study was designed and conducted in which soils were incubated to three alternate drying and wetting cycles for 21 days. Single and sequentially extracted Cu ions in all three cycles and by all three selective extractants were compared. Maximum amount of Cu was extracted in drying days and 1M HCl extracted the largest proportion of Cu from all the soils in each incubation time. Conversely, 1M NH₄Cl was the least effective extractant for extracting Cu by both single and sequential process in either day of incubation. Considerable amount of Cu was extracted by 0.005 M DTPA in dry periods. In general, single extraction was found to be more effective in extracting Cu in the alternate drying and wetting cycles from the peat soil samples except for 1M HCl in initial drying days.A comprehensive<em> in vitro</em> study on single and sequential extraction methods for Cu exraction by different extractants of distinct chemical nature from some peat soils of Bangladesh was conducted to assess the pattern of metal-extractability in drying and wetting sequences. Samples were collected from peat basins of two different districts of Bangladesh (Gopalgonj and Bagerhat) and an incubation study was designed and conducted in which soils were incubated to three alternate drying and wetting cycles for 21 days. Single and sequentially extracted Cu ions in all three cycles and by all three selective extractants were compared. Maximum amount of Cu was extracted in drying days and 1M HCl extracted the largest proportion of Cu from all the soils in each incubation time. Conversely, 1M NH₄Cl was the least effective extractant for extracting Cu by both single and sequential process in either day of incubation. Considerable amount of Cu was extracted by 0.005 M DTPA in dry periods. In general, single extraction was found to be more effective in extracting Cu in the alternate drying and wetting cycles from the peat soil samples except for 1M HCl in initial drying days.

关 键 词：Copper Single and Sequential Extraction NH4CL DTPA HCL Peat Soil 

分 类 号：S15[农业科学—土壤学]