摘要
以蛇纹石制备的硫酸镁为镁源,以氨气为沉淀剂,常压下采用一步法制备氢氧化镁。对氢氧化镁吸附处理含砷(Ⅴ)废水进行了研究,考察了氢氧化镁用量、pH值、吸附时间及砷初始浓度等因素对砷(Ⅴ)去除效果的影响,并探讨了吸附作用机理。结果表明:氢氧化镁对废水中砷(Ⅴ)的去除率为76.45%,氢氧化镁对水溶液中砷(Ⅴ)的吸附量随吸附时间的变化规律符合Langmuir吸附等温模式,而吸附量随砷起始浓度的变化则符合Freundlich吸附等温模式。
A magnesium hydroxide based on magnesium sulfate from silicate was prepared using ammonia as a precipitation agent by one-step method under atmospheric pressure.The adsorption of magnesium hydroxide with arsenic （Ⅴ） in wastewater was investigated.The effects of parameters （such as the dosages of magnesium hydroxide,pH value of the arsenic solution,adsorption time and the initial concentration of the arsenic solution） on the removing rate of arsenic （Ⅴ） were analyzed.The adsorption mechanism was discussed.The experimental results of the adsorption indicate that the removing rate of arsenic （Ⅴ） is 76.45%.The adsorption in the magnesium hydroxide adding water solution arsenic （Ⅴ） with the variation of the adsorption time follows the Langmuir adsorption isotherm model.The adsorption with the change of the arsenic initial concentration follows the Freundlich adsorption isotherm model.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2010年第1期114-118,共5页
Journal of The Chinese Ceramic Society
基金
安徽高校省级自然科学研究重点计划项目(KJ2008A066)资助项目
关键词
硫酸镁
氢氧化镁
砷
吸附机理
magnesium sulfate
magnesium hydroxide
arsenic
adsorption mechanism
