摘要
采用天然高岭土为原料 ,加入一定量的 Al2 O3、Si O2 和 Fe2 O3,经与 Na2 CO3、KCl O3混合 ,高温 (75 0～ 85 0℃ )固相反应约 3h后制得改性高岭土。本文研究了改性高岭土的不同 Al/ Si摩尔比、p H值和投加量对水源水的混凝絮凝除浊和杀菌效果的影响。结果表明 :改性高岭土在 p H值在 6 .5～ 8.5 ,对水源水的除浊消毒效果较好 ,Al/ Si摩尔比为 5 .0(Al∶ 10 .5 %、Si∶ 2 .1%、Fe∶ 3.8% ) ,剂量 2 0 0 ppm时 ,净化水的浊度 <2 .5 NTU,细菌菌落数 2 3个 / ml,总大肠菌群 <3个 / L ,均达到国家饮用水标准。 p H为 10 .
Natural Kaolin was used as a starting material mixing amout of SiO 2?Al 2O 3?Fe 2O 3 and Na 2CO 3?KClO 3 by high temperature (750～850℃) solid phase reaction for about 3h.The modified kaoline was produced with a different Al/Si molar ratios from the natural one.The experiment threw light on modified kaoline of the coagulation-flocculation and germicide on source-water,with different Al/Si molar ratios,pH and dosage.The result showed:With weak acid-base,the modified kaolines removal turbidness and germicide proved well,especially when pH range from 6.5 to 8.5,Al/Si moral ratio 5.0(Al:10.5%;Si:2.1%;Fe:3.8%),dosage 200 ppm.After treatment,the purified waters turbidety <2.5NTU,the total bacterium colony <23/ml,colie colony groups<3/L.All above reached to the national drinking-water standard.But when pH is over 10.5,it showed turbidness wasnt removed.
出处
《重庆环境科学》
北大核心
2003年第9期35-37,共3页
Chongqing Environmental Science
关键词
改性高岭土
混凝絮凝
除浊
消毒
modified kaoline
coagulation-flocculation
removal turbidness
disinfection
