Influence of soil physicochemical properties,particle size fractions and mineralogy on the leaching potentials of arsenic and antimony in abandoned mine soils

作     者：A.S.M.Fazle BARI Dane LAMB Geoff R.MACFARLANE Mohammad Mahmudur RAHMAN A.S.M.Fazle BARI;Dane LAMB;Geoff R.MACFARLANE;Mohammad Mahmudur RAHMAN

作者机构：Global Centre for Environmental Remediation(GCER)College of EngineeringScience and EnvironmentThe University of NewcastleCallaghanNSW 2308Australia Department of Soil ScienceSher-e-Bangla Agricultural UniversityDhaka 1207Bangladesh Chemical and Environmental EngineeringSchool of EngineeringRMIT UniversityMelbourneVictoria 3000Australia School of Environmental and Life SciencesThe University of NewcastleCallaghanNSW 2308Australia 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2023年第33卷第5期

页      面：744-753页

核心收录：

学科分类：12[管理学] 1204[管理学-公共管理] 082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 120405[管理学-土地资源管理] 

基　　金：University of Newcastle Australia  UON 

主　　题：particle size fraction sequential extraction toxic element toxicity characteristic leaching procedure waste extraction test 

摘      要：At abandoned mine sites,arsenic(As)-and antimony(Sb)-enriched soils are often disposed of through onsite burial or *** highly weathered mine sites,the mobility of As and Sb is typically controlled by iron(Fe)(III)/Fe(II)phases;thus,the suitability of such disposal methods and appropriate testing techniques are *** the present study,leaching potentials of As and Sb were examined using the toxicity characteristic leaching procedure(TCLP),waste extraction test(WET),and WET-extended procedure(WET-EXT)at three abandoned mine site soils in *** leached concentration of As regularly exceeded USEPA criteria(5 mg L^(-1)).The highest leached concentrations of As and Sb were observed in the finest particle size fraction(0.053 mm)by WET-EXT(1040 mg L^(-1)for As and 21.10 mg L^(-1)for Sb)followed by WET(800 mg L^(-1)for As and 20.90 mg L^(-1)for Sb).The TCLP method resulted in the lowest concentrations of leached As(0.0009 mg L^(-1))and Sb(0.0003 mg L^(-1)).Crystalline and amorphous As-bearing Fe oxides were the main phases in the soils ***,the best correlations of leached As determined by TCLP(0.832),WET(0.944),and WET-EXT(0.961)were found with the non-specifically sorbed(NS1)As *** mineralogical and sequential extraction data clearly indicate the dominant role of Fe geochemistry in controlling leachability of As and *** TCLP method was unlikely to be suitable for assessing leachability,as it exhibited no relationship with leachable Fe and substantially lower leached As and Sb than the other two *** the high to extremely high leachable As and Sb concentrations,most of the soil samples would not be recommended for placement in capping works,old shafts,or reduction systems(e.g.,collection in drainage basins).