微孔球状氢氧化镁对水样中刚果红的吸附工艺优化.pdf

化
工
进
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2017年第36卷第7期
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2707
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研究开发
微孔球状氢氧化镁对水样中刚果红的吸附工艺优化
蒋徳敏,陈书鸿',赖庆轲',黄美英,陈明君',陈建钩2,何阳
(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)
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,提出了一种球状氩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、氯氧化钠和氪水为原料,在晶型控制剂条件下制备球状氩氧化镁,利用X
射线行射仪(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、温度等因素对吸附放果的
影响。研究表明,球状氩氧化镁加入剂量、时间、溶液pH、温度对氩氧化镁吸附刚果红影响较大,振荡转速对
其吸附影响較小。同时,在刚果红初始浓度为100mgL时,得到其最佳吸附工艺条件为:在室温下,微孔球状
氪氧化镁的投入量为2gL,吸附时间为70min,刚果红溶液的pH调节到4~8,吸附振满转速为20r加min。在此
吸附工艺条件,对刚果红初始浓度为100mgL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,球状氩氧化镁对刚果红分子的吸附更符合工 langmuir模型;刚采红度水溶液初
始pH在4~8时, Freundlich吸附模式更适合描述球状氫氧化镁对刚果红的吸附。
关键词:孔球状;氩氧化镁;制备;吸附;刚果红
中图分类号:TQ09文献标志码:A文章编号:1000-6613(2017)07~2707-07
DOI:10.16085/isn.10006613.2016-2188
Adsorption process optimization of Congo red in water samples by
micro-porous spherical magnesium hydroxide
LANG Demin CHEN Shuhong LAT Ningke HUANG Meiying CHEN Mingun, CHEN Jianjun
HE Yang
School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongging 404100, China
2 School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
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.
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
收稿日期:2016-11-24:修改稿只期:2017-01-12。
大学生创新实验项目(2017039)。
基金项目:国家自然科学基金(21076131)、四川省科技支撑计划
第一作者及联系人:蒋德敏(1987),男,硕士,助教,研究方向
(2014G70076)、重庆市教委科技项目(KJ710245)及重庆三峡学院
为化工新技术新工艺开发。E-mai:dmhuagong@163.com。
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