过氧化钙在城镇黑臭水体修复中的作用
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2020-03-21 11:42:34
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·340·化工进展CHEMICALINDUSTRYANDENGINEERINGPROGRESS2016年第35卷增刊2’/l/’/l综述与专论i砖//过氧化钙在城镇黑臭水体修复中的作用李亮。,武成辉,陈涛,林翰志。,晏波,肖贤明(中国科学院广州地球化学研究所有机国家重点实验室和广东省环境资源利用与保护重点实验室,广东广州510640;。中国科学院大学,北京10O049)摘要:我国城镇水体污染严重,本文根据城镇黑臭水体污染与生态修复治理技术现状,分析得出水体缺氧是导致城镇水体黑臭污染的主要原因以及复氧措施在治理黑臭水体时的重要性,介绍了水体原位复氧具有对水体扰动小、修复效果明显和不产生二次污染等优点,但常规复氧措施存在工程规模大、设备运行昂贵和后期仪器维护贵等问题。结合CaO2在黑臭水体原位治理过程的高效释氧、强化微生物活性及释放羟基自由基等特性,简述了caOz对黑臭水体中有机物、重金属、氮磷营养元素及硫化物等污染物的去除机理与修复效果;通过归纳Ca0z在黑臭水体修复过程中的不足,建议在CaOz对污染物的降解机理和缓释型CaOz复合释氧剂等方面应加强研究;指出缓释型caO复合释氧剂在城镇黑臭水体生态修复治理中具有重要实际意义。关键词:黑臭水体;过氧化钙;需氧;原位修复中图分类号:X522文献标志码:A文章编号:1000—6613(2016)s2—0340—07D0I:10.16o85/J.issn.1000—6613.2016.s2.06lEffectofcalciumperoxideontherestorationofblackandodorouswaterintownsLILiang,WUChenghui,CHENTao,LJNHanzhi,YANBo,XIAOXianming(StateKeyLaboratoryofOrganicGeochemistry,GuangdongKeyLaboratoryofEnvironmentalProtectionandResourcesUtilization,GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Guangzhou510640,Guangdong,China;UniversityofChineseAcademyofSciences,Beijing100049,China)Abstract:BasedonthecurrentsituationaboutblackandodorouswaterandthetechnologyOfecologicalrestorationintownsofourcountry.Theprimarycauseofblackandodorouswastewaterishypoxiastatusinwaterandtheimportantofreoxygenationmeasuresinrepairingblackandodorouswaterareobtained.Theadvantagesofin-situremediationareintroduced,suchaslittledisturbance、resultisobviousanddoesnothavesecondarypollutioninwater,buttheweaknessaboutneedingalargescaleproject,highpriceandcostofdailyoperatingandmaintainofconventionalreoxygenationmeasuresareshown.TheeffectofCaO2onreleasingoxygenefficiently,intensifyingthemicrobialactivitilyandreleasinghydroxylradicalsinrestoringtheblackandodorouswater.TheremovalmechanismandtheremediationeffectofCaO2onorganicmatters,heavymetals,nitrogenandphosphorusnutritionelementsandsulfideinblackandodorouswaterareillustrated.ThedisadvantageoftheblackandodorouswaterrestoredbyCaO2weresummared.ThemechanismofdegradationtopollutantsbyCaO2,sustained—releasecompoundoxygenreleaseagentaresuggest
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