新型复合药剂原位修复河道底泥污染

第11卷第6期环境工程学报Vol.11,No.62017年6月ChineseJournalofEnvironmentalEngineeringJun.2017基金项目:国家水体污染控制与治理科技重大专项(2011ZX07303-002,2012ZX07205-002)收稿日期:2016-03-03;录用日期:2016-04-12第一作者:贺振洲(1990—),男,硕士研究生,研究方向:水污染控制。E-mail:hzz0510@foxmail.com∗通信作者,E-mail:cuikangping@163.com新型复合药剂原位修复河道底泥污染贺振洲1,崔康平1,∗,慈曾福2,王郑1,孟蓉11.合肥工业大学资源与环境工程学院,合肥2300092.合肥市排水管理办公室,合肥230001摘要采用新型复合药剂开展河道底泥原位修复技术研究,通过考察河道水质改善效果、底泥中磷含量及形态的变化确定药剂的最佳投加量。结果表明,投加复合药剂对上覆水体中TN、NH+4-N和TP均有不同程度的净化效果,且净化效果随药剂量的增加而增强,最高去除率分别达到23.52%、21.79%和81.5%,上覆水体COD去除率随药剂投加量增多呈先升后降的趋势,最高(投加量为600mg·L-1)达到57.6%。从底泥磷含量及形态变化来看,投加药剂增大了底泥TP含量并促进底泥不稳态磷向稳定态磷转化。因此,从经济成本和修复效果方面综合分析,以投加量为600mg·L-1对底泥污染原位修复较为合适。关键词新型复合药剂;原位修复;上覆水体;底泥;磷形态中图分类号X522文献标识码A文章编号1673-9108(2017)06-3481-6DOI10.12030/j.cjee.201603032Newcompositeagentin-situremediationforriversedimentpollutionHEZhenzhou1,CUIKangping1,∗,CIZengfu2,WANGZheng1,MENGRong11.SchoolofResourcesandEnvironmentalEngineering,HefeiUniversityofTechnology,Hefei230009,China2.HefeiMulicipalDrainageManagementOffice,Hefei230001,ChinaAbstractAnewcompositeagentwasusedforin-situsedimentremediation.Theeffectsofremediation,thecon-centrationofTPinthesediment,andtheformsofphosphoruswereinvestigatedinthisstudy.TheresultsshowedthatthenewcompositeagentremovedTN,NH+4-N,andTPwell,andanenhancedeffectwasachievedwithadoseincreaseofthenewcompositeagent.ThehighestremovalratesofTN,NH+4-N,andTPwere23.52%,21.79%,and81.5%,respectively.Inthewaterbodyoverlyingthesediment,theremovalrateofCODfirstin-creasedandthendecreased,asthedosageofthereagentincreased,withthehighestremovalrate(dosageof600mg·L-1)reaching57.6%.AddingthenewcompositeagentcanincreasetheconcentrationofTPinthesedimentandcanpromotetheconversionofunstablephosphorustoasteadystate.Basedoneconomiccostsandremediationeffects,theoptimumdosageofthenewcompositeagentwas600mg·L-1.Keywordsnewcompositeagent;in-situremediation;overlyingwater;sediment;phosphorusforms近年来,我国城市河流的污染越来越严重,甚至在一些河流中出现了生态退化、河流黑臭等问题[1]。河道底泥聚集了各类污染物(重金属污染物、有机污染物和营养物质),这些污染物在经过物理、化学和生物作用后会再次释放到水体中,对河流产生二次污染[2-4]。随着对“