摘要
以改性香蕉皮为吸附剂,对酸性品红模拟印染废水进行吸附脱色处理。实验结果表明:香蕉皮的最佳改性剂为硫酸,最佳改性条件为2 mol/L硫酸、硫酸与香蕉皮液固比3∶1、改性30 min;改性香蕉皮吸附酸性品红的实验中,搅拌速度和吸附时间是影响脱色率的两个重要因素,最佳吸附条件为:100 m L初始质量浓度为30 mg/L的酸性品红溶液,吸附剂用量为0.5 g、搅拌速度100 r/min、吸附2 h,此时酸性品红废水的脱色率为77.12%,脱色后模拟废水的稀释倍数为40倍,低于《纺织染整工业水污染物排放标准》(GB 4287—2012)中的排放限值;等温吸附实验说明,改性香蕉皮对酸性品红的吸附用弗罗因德利希吸附等温方程拟合更好。
The modified banana peel is used as the adsorbent to treat the stimulant acid fuchsin wastewater. The results show that the optimum modifying agent for banana peel is sulfuric acid with the molar concentration at 2 mol/L, the ratio of liquid（acid） to solid（banana peel） is 3 ∶1, and the proper reaction time is 30 min. For the adsorption of acid fuchsin by modified banana peel, stirring rate and adsorption time are two important factors influencing the decolorization rate. The optimal adsorption conditions are listed as follows： the volume of acid fuchsin solution with the initial concentration at 30 mg/L is 100 m L, the amount of adsorbent is 0.5 g, the stirring rate is 100 r/min, and the adsorption time is 2 hours. Under above conditions, the decolorization rate of acid fuchsin wastewater is 77.12%, and the dilution ratio（40 times） is lower than the limit value regulated in Discharge standards of water pollutants for dyeing and finishing of textile industry（GB 4287-2012）. The isotherm adsorption experiment shows that the adsorption of acid fuchsin by modified banana peel fits better with Freundlich isotherm equation.
出处
《上海化工》
CAS
2015年第5期1-5,共5页
Shanghai Chemical Industry
基金
污染物分析与源资化技术湖北省重点实验室开放基金项目(KL2013G04)
关键词
香蕉皮
改性
酸性品红
吸附
脱色率
Banana peel
Modificalion
Acid fuchsin
Adsorption
Decolorization rate
