赤泥碱性调控研究进展  

Alkaline regulation of bauxite residue:A comprehensive review

作　　者：薛生国[1] 李晓飞[1] 孔祥峰[1] 吴川[1] 李义伟[1] 李萌[1] 李楚璇[1] 

机构地区：[1]中南大学冶金与环境学院,长沙410083

出　　处：《环境科学学报》2017年第8期2815-2828,共14页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.41371475);国家公益性(环保)行业科研专项(No.201509048)~~

摘　　要：赤泥是氧化铝工业生产过程产生的强碱性固体废弃物,资源化利用难、环境风险高,严重制约了氧化铝行业的可持续发展.赤泥土壤化是实现规模化处置赤泥的一种可行方法,而碱性调控则是赤泥土壤化的关键环节.论文在综述氧化铝生产过程碱性物质形成过程的基础上,从可溶性碱和化学结合碱角度分析了赤泥碱性物质的赋存状态,阐述了国内外化学调碱法和生物调碱法的研究进展和碱性转化机制,剖析了赤泥碱性调控方面存在的问题,提出了赤泥碱性调控研究的发展方向.这将为赤泥规模化处置和堆场生态重建、保障氧化铝工业的健康发展提供科学参考.Bauxite residue,a highly alkaline solid waste,is generated in the process of alumina production.The majority of bauxite residue is stored on land,but has the potential to be harmful to the surrounding environment and human health,thus seriously impacting sustainable development of alumina industry.Soil formation from bauxite residue（SFBR） is a desirable method for large-scale remediation,but alkaline regulation is the key process that controls SFBR.In this review,generation and composition of alkaline materials including free alkali and chemical bonded alkali in the process of alumina production are summarized.Current status of alkaline regulation and the mechanisms of alkalinity transformation are illustrated in detail.Existing problems associated with the regulation of bauxite residue alkalinity are comprehensively analyzed,whilst future research directions are proposed.This review provides a scientific reference for the management and disposal of bauxite residue,its ecological rehabilitation and sustainable development of alumina industry.

关 键 词：赤泥 赤泥土壤化 碱性赋存形态 碱性调控 

分 类 号：X705[环境科学与工程—环境工程]