摘要
利用HNO3对草鱼鱼鳞浸泡改性制备吸附剂,通过系列吸附实验,考察甲基橙初始浓度、鱼鳞投加量和吸附温度等因素对改性鱼鳞吸附水中的甲基橙性能的影响,通过FTIR、XRD、吸附等温线和吸附动力学分析吸附机理。结果表明,鱼鳞用1 mol/L HNO3浸泡3 h所制备的吸附剂对甲基橙染料废水具有很好的吸附性能;在室温(20~25℃)条件下,溶液pH介于4~9,10 g/L改性鱼鳞吸附剂的投加量和初始甲基橙浓度为100 mg/L时,改性鱼鳞吸附剂对甲基橙吸附在反应2 h时效果最佳;通过吸附等温线实验发现,HNO3改性鱼鳞对甲基橙的吸附符合Freundlich吸附等温式,而动力学实验表明吸附过程符合准二级动力学模型;FTIR和XRD分析表明,HNO3改性鱼鳞溶解了其中部分羟基磷灰石,对甲基橙的吸附主要是改变其物理结构而提高吸附效果。
HNO3 was used to soak and modify grass carp scales to prepare adsorbent.The effects of initial concentration of methyl orange,dosage of fish scale and adsorption temperature on the adsorption performance of modified fish scale for methyl orange in water were investigated through a series of adsorption experiments.The adsorption mechanism were studied by FTIR,XRD,adsorption isotherms and adsorption kinetics.The results showed that the adsorbent prepared by soaking fish scale with 1 mol/L HNO 3 for 3 h had good adsorption performance for methyl orange dye wastewater;under the condition of room temperature(20~25℃),when the pH of solution was between 4~9,the dosage of 10 g/L modified fish scale adsorbent and the initial concentration of methyl orange were 100 mg/L,the modified fish scale adsorbent had the best adsorption effect for 2 h;It was found that the adsorption isotherm of methyl orange by HNO 3 modified fish scale conformed to Freundlich adsorption isotherm,while the kinetic experiment showed that the adsorption process conformed to the quasi second order kinetic model;FTIR and XRD analysis showed that HNO 3 modified fish scale dissolved part of hydroxyapatite,and the adsorption of methyl orange was mainly to change its physical structure and improve the adsorption effect.
作者
黄岚
张顺喜
刘霞
王文清
HUANG Lan;ZHANG Shun-xi;LIU Xia;WANG Wen-qing(School of Chemistry and Environmental Engineering,Wuhan Polytechnic University,Wuhan 430023,China)
出处
《应用化工》
CAS
CSCD
北大核心
2020年第11期2816-2820,共5页
Applied Chemical Industry
基金
湖北省自然科学基金项目(2016CFB588)。
关键词
HNO3
鱼鳞
吸附
甲基橙
HNO3
fish scales
adsorption
methyl orange
作者简介
黄岚(1974-),女,江西崇仁人,武汉轻工大学讲师,硕士,主要从事水处理和水质监测,电话:18971133115,E-mail:12548327@qq.com。
