含砷石灰铁盐渣的理化特性及其浸出行为

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 27; no. 5; pp. 1188 - 1198
Main Author 彭兵;雷杰;闵小波;柴立元;梁彦杰;游洋
Format Journal Article
LanguageEnglish
Published 2017
Subjects
含砷固废;石灰铁盐渣;理化特性;浸出行为;BCR连续提取法
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Bibliography:Physicochemical properties and leaching behaviors of two typical arsenic-bearing lime?ferrate sludges(ABLFS),waste acid residue(WAR)and calcium arsenate residue(CAR),are comprehensively described.The chemical composition,morphological features,phase composition and arsenic occurrence state of WAR and CAR are analyzed by ICP?AES,SEM?EDS,XRD,XPS and chemical phase analysis.The toxicity leaching test and three-stage BCR sequential extraction procedure are utilized to investigate arsenic leaching behaviors.The results show that the contents of arsenic in WAR and CAR are2.5%and21.2%and mainly present in the phases of arsenate and arsenic oxides dispersed uniformly or agglomerated in amorphous particles.The leaching concentrations of arsenic excess119and1063times of TCLP standard regulatory level with leaching rates of47.66%and50.15%for WAR and CAR,respectively.About90%of extracted arsenic is in the form of acid soluble and reducible,which is the reason of high arsenic leaching toxicity and environmental activity of ABLFS.This research provides comprehensive information on harmless disposal of ABLFS from industrial wastewater treatment of lime?ferrate process.
arsenic-bearing sludge; lime.ferrate sludge; physicochemical properties; leaching behavior; BCR sequential extraction
43-1239/TG
ISSN:1003-6326