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时间:2020-03-27
《粉煤灰吸附-石灰沉淀处理高浓度含氟废水.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、化工环保2012年第32卷第4期ENVIRoNME]TALPR0TECTIONOFCHEMICALINDUSTRY·301·粉煤灰吸附一石灰沉淀处理高浓度含氟废水李立,马云飞,丁利群,刘燕,孟昭福。(1.陕西延长石油集团氟硅化工有限公司,陕西西安710075;2.宝鸡市农业技术推广服务中心陕西宝鸡721000;3.西北农林科技大学资源环境学院,陕西杨凌712100)[摘要]采用粉煤灰吸附一石灰沉淀处理高浓度含氟废水。正交实验得到的最佳工艺条件为:反应温度10,石灰加入量3.0g/mL,反应时间6
2、0rnin,废水pH6.88。在此最佳工艺条件下处理F一质量浓度为150mg/L的含氟废水,F一去除率为97.53%。Mn,Fe,Mg“,A1,Zn单独存在时,随5种阳离子质量浓度增大,F一去除率略有增加;当5种阳离子共同存在且质量浓度均大于500mg/L时,F一去除率下降。vol一,so一,c0;一,NO3单独存在时对F一去除率影响不大;当4种阴离子共同存在且质量浓度均大于800mg/L时,F一去除率低于对照实验。[关键词]粉煤灰;吸附;含氟废水;共存离子;废水处理[中图分类号]X703[文献
3、标识码]A[文章编号]1006—1878(2012)04—0301—05TreatmentofHigh·-concentrationFluorine—-containingWastewaterbyFlyAshAdsorption-LimePrecipitationProcessLili,MaYunfei,DingLiqun,LiuYan,MengZhaofu。(1.FluorineandSiliconChemicalsCo.Ltd.,ShaanxiYanchangPetroleumGroup,X
4、i’anShaanxi710075,China;2.BaojiAgriculturalTechnologyExtensionServiceCenter,BaojiShaanxi721000,China;3.CollegeofNaturalResourceandEnvironmentNorthwestAgriculturalandForestUniversity,YanglingShaanxi712100,China)Abstract:High--concentrationfluoride·-co
5、ntainingwastewaterwastreatedbyflyashadsorption-—limeprecipitationprocess.Theoptimumprocessconditionsareasfollows:reactiontemperature10%,limedosage3.0g/mL,reactiontime60min,wastewaterpH6.88.Undertheoptimumconditionsandwith150mg/LofinfluentF~massconcen
6、tration,theF—removalrateis97.53%.WhenMn,Fe,Mg,A1orZn“areexistinginthewastewaterrespectively,theF—removalrateisincreasedalittlewiththeincreasingofeachcationmassconcentration;Whenthe5cationsarecoexistinginthewastewaterwithmorethan500mg/Lofeachcationmas
7、sconcentration,theF—removalrateisdecreased.WhenPO]一,sol一,c0一orNOiisexistinginthewastewaterrespectively,theireffectsontheF—removalratearelittle;Whenthe4anionsarecoexistinginthewastewaterwithmorethan800mg/Lofeachanionmassconcentration,theF—removalratei
8、slowerthanthatinthecontrolledexperiment.Keywords:flyash;adsorption;fluoride—containingwastewater;coexistingion;wastewatertreatment随着我国氟化工产业的不断发展和壮大,含凝法”和以廉价原料或工业固体废物为原料的氟废水的处理问题越来越受到重视。含氟废水尤其吸附一混凝两段式处理工艺。而关于阴、阳是高浓度含氟废水的排放对生态环境造成污染,危离子共存对高浓度含氟废水处理效果的影
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