改性甘蔗渣吸附废水中低浓度Cu2%2b的研究.pdf

廖芳丽等 改性甘蔗渣吸附废水中低浓度Cu2+的研究 改性甘蔗渣吸附废水中低浓度Cu2+的研究 廖芳丽 何 莎 江莎莎 (惠州学院化学工程系，广东 惠州516007) 摘要 利用离子液氯化一1一己基一3一甲基咪唑对甘蔗渣进行改性，利用改性甘蔗渣吸附去除模拟废水中低浓度的cu”，并对比 了较优条件下甘蔗渣改性前后的Cu2+吸附性能。结果表明，溶液pH、改性甘蔗渣投加量、吸附时间对改性甘蔗渣吸附Cu2+均有一 定的影响，较佳的溶液pH为5．41、改性甘蔗渣投加量为0．30g、吸附时间为130min；吸附温度升高Cu2+吸附率反而降低，因此选 择在室温下进行吸附反应为宜；在以上较优条件下，改性甘蔗渣和甘蔗渣的cu2+吸附率分别为83．20％和63．83％，前者的cu抖吸 附率提高了30．35％。 关键词 改性甘蔗渣 吸附Cu2+ IANG onthe oflowconcentrationCu”inwastewatermodified LIAO Sha，J Study adsorption by bagasse Fangli，HE Chemical 516007) Shasha．(Departmentof Engineering，HuizhouUniversity，HuizhouGuangdong the Abstract：Thewasmodifiedinionic chloride(C10H19C1Nz)，and bagasse liquid1一hexyl一3一methylimidazolium obtainedmodified as forremovaloflowconcentrationCu”insimulatedwastewater． was adsorbent bagasseapplied Theeffectof timeonCu”removalwas andthead— pH，modifiedbagassedosage，adsorption efficiencyinvestigated ofmodified was withthatofnon-modified showedthatthe compared bagasse．Results sorptionperformance bagasse treatmentconditionswere5．41，modified0．30and timeof130min．TheCu”re— optimal pH bagasseg adsorption moval wasincreasedwith the the shouldbe atthe efficiency increasingadsorptiontemperature，SOadsorption operated room these conditions，theCuz,+removalrateofmodified andnon- temperature．Underoptimaladsorption bagasse modified was83．20