饮用水预处理去除备用水源三卤甲烷生成潜能

第33卷第3期2014年6月四川环境SICHUANENVIR0NMENTVo1．33．No．3June20l4·试验研究·饮用水预处理去除备用水源三卤甲烷生成潜能徐正阳，高乃-X-，王万江，陈义春。，朱永林。，吴和生，吴徐。(1．新疆大学建筑工程学院，乌鲁木齐830000；2．同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室，上海200092；3．镇江自来水公司，江苏镇江212002)摘要：针对镇江金山湖备用水源，考察混凝、预氧化、预氯化、粉末活性炭吸附以及与预氧／氯化联用工艺对天然原水三卤甲烷生成潜能(THMFP)和UV的去除效果。结果表明，3种无机盐混凝剂中三氯化铁去除效果最好，且去除效果随投加量增大而提高；高锰酸钾预氧化在低投加量时可取得良好效果，增大投加量去除率降低；次氯酸钠预氯化会产生大量THMs，不宜单独使用；粉末活性炭吸附去除效果分别随时间和投加量增加而增大；预氧／氯化与粉末活性炭联用工艺去除率最高(60％)，且活性炭吸附可大大减少预氯化产生的THMs。关键词：三卤甲烷生成潜能；天然原水；混凝；预氧化；预氯化；粉末活性炭中图分类号：X703文献标识码：A文章编号：1001—3644(2014)03-0006-08RemovalofRegulatedDisinfectionBy-productsTrihalomethanesFormationPotentiiil(THMFP)fromBackupWaterSourcebyDrinkingWaterPretreatmentXUZheng．yang，GA0Nai．ytm，Gwan．jiang，c皿NYi．chtm，zHUYong—lWUHe—sheng3，WUxu(1．Architectural&CivilEngineeringCollegeofXinjiangUniversityUrumqi830000，China；2．StateKeyLaboratoryofPollutionControl&ResourceReuse．SchoolofEnvironmentalScience&Engineering，TongjiUniversity，Shanghai200092，China；3．ZhenfiangCityWaterCo．Ltd．，Zhenjiang，Jiangsu212002，China)Abstract：Theremovaleficiencyoftrihalomethanesformationpotential(THMFP)andUV254bycoagulation，pre—oxidation，pre—chlorination，powderedactivatedcarbonadsorptionandcombinedprocessofpre—oxidation／pre-chlorinationandpowderedactivatedcarbonofJinshanLake，backupwaterresourceinZhe~iangwasinvestigated．Theresultindicatesthatferricchloridehasthebestremovaleficiencyamongthreeinorganiccoagulants，andtheremovaleficiencyimproveswithincreasingcoagulantdosage．ThebestremovaleficiencyofTHMFPoccursatalowdosagelevelofpotassiumpermanganatepre—oxidationwhilehighdosageofpotassiumpermanganatepre—oxidationdecreasesremovaleficiency．ChlorinationofsodiumhypochloritewouldproducelargequantityofTHMs，SOitisnotsuggesttousepre—chlorinationalone．Theremovaleficiencyofpowderedactivatedcarbonadsorptionimproveswithincreasingtimeanddosage．Combinedprocessofpre—oxidation／pre—chlorinationandpowderedactivatedcarbonhasthehighestreInovalefficiencywhichis60％，andactivatedcarbonadsorptioncouldlargelyreducetheTHMsgeneratedbypre—chlorination．K