高温氧气流改性海泡石处理印染废水性能及再生研究  

Adsorption Performance of Hot Oxygen Stream Modified Sepiolite and Its Regeneration Using Auramine O as Model

作　　者：陈孟林[1] 陈煜航 冯金宇 高澍[1] 黄智[1] 宿程远[1] 林香凤[1] CHEN Menglin;CHEN Yuhang;FENG Jinyu;GAO Shu;HUANG Zhi;SU Chengyuan;LIN Xiangfeng(College of Environment and Resources,Guangxi Normal University,Guilin Guangxi 541006,China)

机构地区：[1]广西师范大学环境与资源学院,广西桂林541006

出　　处：《广西师范大学学报（自然科学版）》2023年第3期232-241,共10页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金(21166005);广西自然科学基金(2017GXNSFBA198216);广西创新驱动发展专项(桂科AA20161002-1)。

摘　　要：本文采用高温氧气流改性和再生天然海泡石,研究了改性海泡石(H/海泡石)吸附去除模拟印染废水中碱性嫩黄O染料及其再生的性能,以及H/海泡石静态吸附碱性嫩黄O的特点,采用相关模型拟合,考察了高径比(填料高度与吸附柱内径的比值)、染料溶液流速和浓度对H/海泡石动态吸附的影响。结果表明,改性温度和时间分别为550℃和1 h,氧气流速为6 L/min得到的改性海泡石的单位吸附量超过200 mg/g;Langmuir等温吸附方程、准一级动力学方程分别符合H/海泡石的吸附行为、吸附动力学;高径比为2.5,染料流速为每小时6倍床体积,染料初始浓度为200 mg/L时,H/海泡石分别能处理的废水量约为55、42和45倍床体积;采用高温氧气流对吸附饱和的H/海泡石进行再生,再生温度和时间分别为550℃和20 min,再生氧气流速为6 L/min时,再生率接近100%。In this study,a new hot oxygen stream modification and regeneration method was used to modify sepiolite(H/sepiolite)and remove the organic dye auramine O.It was found that the unit adsorption capacity of modified sepiolite exceeded 200 mg/g at the modification temperature and time of 550℃and 1 h and an oxygen flow of 6 L/min.The characteristics of static adsorption of auramine O over H/sepiolite were studied and fitted by relative models,and the results showed that the Langmuir isotherm and pseudo-first-order kinetic could describe the adsorption behavior and kinetics of H/sepiolite.The effects height-diameter ratio(the ratio of packing height to inner diameter of adsorption column),flow rate and concentration of dye solution on dynamic adsorption were studied,the results displayed that about 55 BV(bed volume),42 BV and 45 BV of wastewater ware treated on the condition of height-diameter ratio=2.5,the dye flow rate=6 BV/h and the dye initial concentration=200 mg/L,respectively.The hot oxygen stream was used to regenerate the saturated H/sepiolite,the regeneration rate could reach nearly 100%at the gas flow rate of 6 L/min,regeneration temperature of 550℃,and regeneration time of 20 min.

关 键 词：改性海泡石 碱性嫩黄O 高温氧气流 再生 吸附 

分 类 号：X791[环境科学与工程—环境工程]