电位作为无机混凝剂水处理性能评价指标的可行性实验研究刘惠君

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    :2000-10-08    :(9718)ζ刘惠君(, 310027) :用混凝剂聚合氯化铝(PAC)和硫酸铝(AS)对模拟废水进行处理,以ζ电位作为指标对混凝剂的水处理性能进行评价。结果表明,废水经混凝剂处理后,絮体ζ电位的大小与PAC的Al2O3含量、盐基度以及AS的Al2O3含量、铁含量和水不溶物含量等理化指标有较密切的关系。ζ电位在一定程度上可反映混凝剂水处理效果的好坏,该值可作为评价无机混凝剂产品水处理性能的一个辅助指标。:聚合氯化铝;硫酸铅;ζ电位:TQ314.253  :A  :1000-3770(2002)02-0078-04  PACAS,ζ,。1 实 验1.1 2123。9,6,8。1.2  DBJ623,4332;LXJ-Ⅱ,;WGZ-1,;HX-Ⅰζ,。1.3 。1.4 ,200。,,NaOHpH9~10,2h,250r/min。,,2500r/min,,1mol/LNaCl1L,0.5h,,,,100mL,Cl-,,、、,,200NTU。ζ(-50±5)mV。1.5 ζζ。,250mL,,,150r/min1min,,,,CCD,,ζ。第28卷 第2期2002年4月                 TECHNOLOGYOFWATERTREATMENT       Vol.28No.2Apr.,2002DOI:10.16796/j.cnki.1000-3770.2002.02.0052 结果和讨论2.1 2.1.1 聚合氯化铝产品技术指标测定GB15892-1995,14,1。2.1.2 固体硫酸铝产品技术指标测定HG2227-918,2。1   12345678101112131415Al2O3(%)11.612.37.15.85.38.75.43.631.034.527.726.627.632.1 (%)79.783.493.441.070.482.082.725.279.383.091.193.090.578.0(%)0.040.090.100.190.060.100.080.480.230.240.420.600.541.02pH4.64.04.94.24.74.84.94.24.54.64.84.74.64.52   1617181920212223Al2O3(%)15.8815.8714.3316.0816.4415.9715.7915.82 (%)0.090.240.350.010.010.090.080.11(%)0.040.070.210.070.050.060.090.06pH3.33.62.63.63.43.53.33.22.2 ζζ。,,、,ζ,。,ζ,。,ζ。,,,,ζ。,5~6,,ζ。2.2.1 聚合氯化铝(PAC)对模拟废水ζ电位影响的研究及评价2.2.1.1 液体PAC对模拟废水ζ电位影响的研究及评价2.2.1.1.1 液体PAC投药量的确定Al2O3,28。,50~175mg/LPACζ。2.2.1.1.2 液体PAC对模拟废水的处理250mL,150mL,150r/min,PAC,PAC50、75、100、125、150、175mg/L。1min,,ζ。2.2.1.1.3 液体PAC产品对模拟废水ζ电位的影响及评价3,,PACζ。2ζ,175mg/L,ζ-45mV1.36mV,,2,。16Al2O3,,ζ,175mg/L,16ζ-3.59mV-3.85mV,。3Al2O316,,3ζ,16,125mg/L150mg/L,3ζ-21.89mV-15.06mV,1679  ,ζ。,。,,,,。PAC,,,ζ。4Al2O37,。ζ。8Al2O3,,ζ,175mg/L,-17.65mV。3 PACζ  50(mg/L)75(mg/L)100(mg/L)125(mg/L)150(mg/L)175(mg/L)1-46.45-34.91-29.94-22.78-16.22-3.592-45.05-35.75-27.43-15.83-7.121.363-48.47-35.99-29.44-21.89-15.06-4.664-49.15-44.62-37.92-32.78-27.90-14.915-54.25-45.45-39.45-31.76-25.83-15.896-45.07-37.84-25.63-22.71-17.37-3.857-48.54-43.65-39.64-28.21-23.74-12.098-50.87-45.75-34.36-26.88-30.19-17.65  PACζ:,2、3、1、6ζ,ζ,,。7、5、4、8ζ。,Al2O3PAC,ζ,。2.2.1.2 固体PAC对模拟废水ζ电位影响的研究及评价PAC,PAC,20、40、50、60、80mg/L。4 PACζ  20(mg/L)40(mg/L)50(mg/L)60(mg/L)80(mg/L)10-47.87-38.78-27.95-14.27-5.6311-49.60-37.45-22.40-13.01-2.2912-47.31-40.75-31.11-18.84-17.4613-49.75-38.82-28.02-19.09-11.8214-48.38-41.62-29.41-16.20-6.7415-46.30-35.71-25.50-14.31-0.92  4,PAC,ζ。,Al2O3,ζ。PAC,,ζ。,1115ζ。50mg/L11ζ,-50mV-22.40mV,15ζ-25.50mV,1115Al2O3,12、13、14Al2O3,ζ,50mg/L,12、13、14ζ-31.11mV、-28.02mV、-29.41mV。PAC80mg/L,1115,ζ-2.29mV-0.92mV。10ζ-5.68mV,。12、13、14,ζ-7.46mV、-11.82mV、-6.74mV。PACζ:,11、15、8028 2  10ζ,12、13、14ζ,。2.2.2 固体硫酸铝(AS)产品对模拟废水ζ电位影响的研究及评价PAC,(AS),20、50、80、100、120mg/L。5 ASζ  20(mg/L)50(mg/L)80(mg/L)100(mg/L)120(mg/L)16-44.39-31.16-13.56-8.48-3.5617-44.67-30.08-17.34-12.35-3.1218-46.32-32.54-16.21-7.60-2.6919-41.65-31.84-15.28-4.661.8520-39.78-26.34-11.66-4.683.2521-40.63-28.29-10.03-4.24-0.3522-44.21-26.46-19.95-8.03-2.7823-45.62-31.11-14.09-9.770.62  5,,ζ,。,,。AS100mg/L,,19、20、21ζ。120mg/L,ζζ(-5mV~5mV),。,19、20、21ζ,。,3Al2O3,Fe,,。3 结 论,,ζAl2O3,Al2O3,ζ。Al2O3,ζ,PAC,,;AS,Fe,,。,ζAl2O3,,。STUDYOFζPOTENTIALASEVALUATINGINDEXOFCOAGULANTSTREATMENTCAPACITYLIUHui-jun(InstituteofEnvironmentalScience,YuquanCampus,ZhejiangUniversity,Hongzhou310027,China)Abstract:Treatingcapacityofcoagulantpolymericaluminumchloride(PAC)andaluminumsulfuricacid(AS)forsimulatedwastewaterwasstudiedbyusingζpotentialasanevaluatingindex.TheresultsshowedthatcontentofAl2O3andsalinityofPAC,contentofAl2O3,FeandundissolvedmatterofASwerethemainfactorstoaffecttreatingcapacity,ζpotentialcanbeuesedasaevaluatingparamaterforcoagu-lantstreatcapacity.Keywords:polymericaluminumchloride(PAC);aluminumsulfuricacid(AS);ζpotential81  ,ζ

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