新型有机膨润土用于印染废水处理的实验研究_彭振华

新型有机膨润土用于印染废水处理的实验研究＊彭振华,徐灏龙(国家环境保护水污染控制工程技术(浙江)中心,浙江　杭州　310007)摘　要:采用二乙烯三胺、环氧氯丙烷合成了一种阳离子型铵盐,用其与十六烷基三甲基溴化铵对钠基膨润土进行复合插层改性,制备得到一种新型有机膨润土;以模拟染料废水和实际印染废水为处理对象,使用改性膨润土进行了吸附脱色实验,吸附完成后加入聚合氯化铝混凝。实验结果表明,与单独投加聚合氯化铝相比,采用改性膨润土吸附后再混凝的方法处理废水,可显著提高脱色率和COD去除率;处理活性艳红X-3B、酸性大红GR与活性艳蓝X-BR三种模拟染料废水时,脱色率分别可达99.4%、84.8%和96.1%;以中试规模处理实际印染废水调节池原水时,COD和色度去除率分别可达51.6%和85.9%;处理实际印染废水好氧生化出水,COD可由121.3mg/L降至65.4mg/L,色度由32倍降至8倍以下。关键词:改性膨润土;二乙烯三胺;环氧氯丙烷;印染废水ApplicationofNewTypeOrganobentoniteforTreatingofDyeingWastewater＊PENGZhen-hua,XUHao-long(StateEnvironmentalProtectionEngineeringCenterforWastewaterPollutionControl(Zhejiang),ZhejiangHangzhou310007,China)Abstract:Anewkindofmodifiedbentonitewaspreparedbyna-bentonite,cetyltrimethylammoniumbromideandcationicammoniumsaltsynthesizedbydiethylenetriamineandepichlorohydrin.Themodifiedbentonitewasusedtotreatsimulateddyeingwastewaterandactualdyeingwastewaterasadsorbentcombinedwithpolyaluminiumchlorideasfloccu-lant.Experimentalresultsshowedthatwhenthewastewaterwastreatedwitha