壳聚糖季铵盐改性膨润土的制备及其对印染废水处理.pdf

_．
eV1ew

壳聚糖季铵盐改性膨润土的制备及其
对印染废水处理

邵红。肖宏康，程慧，金雯雯

沈阳化工大学环境与生物工程学院，沈阳110142

摘要以膨润土为原料，利用壳聚糖季铵盐为改性剂，探讨制备壳聚糖季铵盐改性膨润土的最佳条件。结果表明，土液比为50g·L-’。
原土粒度为O．150mm，壳聚糖季铵盐溶液的质量浓度为1．5g·，微波加热时间7min，浸泡时间30rnin条件下制备的改性膨润对
模拟印染废水脱色率较好。通过正交实验。确定了改性膨润土处理模拟印染废水的最优条件为：pH值为3．0，投土量为14g·L～，搅
拌速度为150r·rnin～，搅拌时间为20min，离心时间为8min。对直接耐晒翠兰和酸性橙红的脱色率分别高达94．6％和8O．3％。改性
土对直接耐晒翠兰的脱色效果优于对酸性橙红的脱色效果。
关键词膨润土；壳聚糖季铵盐：印染废水：脱色
中圈分类号X703．1文献标识码A文章缩号1000—7857(2010)16—0092一O5

PreparationofChitosanQuaternaryAmmoniumSalt-modifiedBentonite
andItsTreatmentofPrintingandDyeingWastewater

SHAOHong，XIAOHongkang，CHENGHut，JINWenwen

CollegeofEnvironmentalandBiologicalEngineering,ShenyangUniversityofChemicalTechnolog),Shenyang110142,China

AbstmcIChitosanquaternaryammoniumsalt—modifiedbentonitewaspreparedusingbentoniteasrawmaterialandchitosanquaternary

ammoniumsaltasthemodifier．Theeffectsofpreparationconditionsondeeolorizationofprintinganddyeingwastewaterwereinvestigated，

andprocessingconditionswereoptimizedwiththeorthogonalexperiment．Theprocessingeffecttodirectfastturquoiseblueandacid

orange—redwascomparedusingmodifiedbentoniteinthetreatment．Theresultswereshownthattheoptimalpreparationconditionsthat

ratioofamountofbentoniteandchitosanquaternaryammoniumsaltsolutionvolumeis50g·I-1，theparticalsizeis0．150ram，the

concentrationofchitosanquaternaryammoniumis1．5g·L～，microwaveheatingtimeis7rainandsoakingtimeis30rain．Withtheoptimal

treatmentconditionsthatpHisat3．0，dosageofmodifiedbentoniteis14g·L～，mixingspeedis150r·rain～andcentrifugationtimeis8rain，

decolorizationofdirectfastturquoiseblueandacidorange-redarerecordedashighas94．6％and80．3％respectively．Decolorizationof

directfastturquoisebluebychitosanquaternaryammoniumsalt-modifiedbentoniteismuchbetterthanthatofacidorange—redby

chitosanquaternaryammoniumsalt—modifiedbentonite．Aboveall，itwasnecessarytoprovidesomescientificbasisforexpanding

modificationfieldandpracticalapplicationofbentonite．

Keywordsbentonite；chitosanquaternaryammoniumsalt；printinganddyeingwastewater；de