化工进展 ›› 2017, Vol. 36 ›› Issue (07): 2707-2713.DOI: 10.16085/j.issn.1000-6613.2016-2188

• 资源与环境化工 • 上一篇    下一篇

微孔球状氢氧化镁对水样中刚果红的吸附工艺优化

蒋德敏1, 陈书鸿1, 赖庆轲1, 黄美英1, 陈明君1, 陈建钧2, 何阳1   

  1. 1 重庆三峡学院环境与化学工程学院, 重庆 404100;
    2 四川大学化学工程学院, 四川 成都 610065
  • 收稿日期:2016-11-24 修回日期:2017-01-12 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: 蒋德敏(1987-),男,硕士,助教,研究方向为化工新技术新工艺开发。
  • 作者简介:蒋德敏(1987-),男,硕士,助教,研究方向为化工新技术新工艺开发。E-mail:dmhuagong@163.com。
  • 基金资助:
    国家自然科学基金(21076131)、四川省科技支撑计划(2014GZ0076)、重庆市教委科技项目(KJ1710245)及重庆三峡学院大学生创新实验项目(2017039)。

Adsorption process optimization of Congo red in water samples by micro-porous spherical magnesium hydroxide

JIANG Demin1, CHEN Shuhong1, LAI Qingke1, HUANG Meiying1, CHEN Mingjun1, CHEN Jianjun2, HE Yang1   

  1. 1 School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404100, China;
    2 School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
  • Received:2016-11-24 Revised:2017-01-12 Online:2017-07-05 Published:2017-07-05

摘要: 为了解决氢氧化镁净化染料废水过程中过滤难的问题,提出了一种球状氢氧化镁的合成方法以及刚果红废水净化处理工艺。采用七水硫酸镁、氢氧化钠和氨水为原料,在晶型控制剂条件下制备球状氢氧化镁,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)等对产物进行表征。通过振荡实验研究了微孔球状氢氧化镁对水溶液中刚果红的吸附行为,分别考察氢氧化镁加入剂量、时间、溶液pH、振荡转速、温度等因素对吸附效果的影响。研究表明,球状氢氧化镁加入剂量、时间、溶液pH、温度对氢氧化镁吸附刚果红影响较大,振荡转速对其吸附影响较小。同时,在刚果红初始浓度为100mg/L时,得到其最佳吸附工艺条件为:在室温下,微孔球状氢氧化镁的投入量为2g/L,吸附时间为70min,刚果红溶液的pH调节到4~8,吸附振荡转速为220r/min。在此吸附工艺条件,对刚果红初始浓度为100mg/L的吸附率高达93.29%。吸附平衡实验表明,在刚果红废水溶液初始pH为2和吸附温度为40℃时,球状氢氧化镁对刚果红分子的吸附更符合Langmuir模型;刚果红废水溶液初始pH在4~8时,Freundlich吸附模式更适合描述球状氢氧化镁对刚果红的吸附。

关键词: 微孔球状, 氢氧化镁, 制备, 吸附, 刚果红

Abstract: In order to solve the problem for the difficulty of mixture filtration in the process of dye wastewater purification by magnesium hydroxide,a new synthesis method of spherical magnesium hydroxide and its process for purification of Congo red wastewater were proposed.Using magnesium sulfate heptahydrate,sodium hydroxide and ammonia as raw materials,the spherical magnesium hydroxide was prepared under the condition of crystal formation controlling agent.The spherical product was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).The adsorption behavior of Congo red on micro-porous spherical magnesium hydroxide in aqueous solution was studied by jar test.The effect of magnesium hydroxide dosing,time,solution pH,oscillation speed and temperature on the adsorption was comprehensively investigated.The study showed that the spherical magnesium hydroxide dosing,time,pH and temperature have major influence on the adsorption of Congo red,while the oscillation speed has a minor effect on its adsorption.The optimized adsorption process conditions are as follows.The oscillation adsorption temperature is room temperature.The amount of the micro porous spherical magnesium hydroxide is 2g/L.The adsorption time is 70min.The pH of the Congo red solution is adjusted to 4-8.The adsorption oscillation speed is 220r/min.Under these adsorption process conditions,the adsorption rate is 93.29% with the initial concentration of Congo red of 100mg/L.The adsorption equilibrium experiments showed that at the initial pH of 2 and the temperature of 40℃,the Langmuir model is more suitable for the adsorption of Congo red on spherical magnesium hydroxide.However,when the Congo red wastewater pH is up to between 4 and 8,the Freundlich model is probably more suitable for its adsorption behavior on the spherical magnesium hydroxide.

Key words: micro-porous spherical, magnesium hydroxide, preparation, adsorption, Congo red

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn