摘要
研究竹炭加入量和废水pH值对吸附效果的影响,以及竹炭对Ni（Ⅱ）的吸附动力学和热力学特性。结果表明,增加竹炭加入量,废水中Ni（Ⅱ）去除率增高,可达95.6%,竹炭对中性和碱性废水中Ni（Ⅱ）吸附效果更好。二级动力学方程很好地表征了竹炭吸附Ni（Ⅱ）的动力学特性。竹炭对Ni（Ⅱ）具有一定的吸附能力,且竹炭粒径越小吸附能力越强,吸附等温线符合Langmuir模型,饱和吸附量为1.0~1.3 mg/g。动态吸附实验表明,出水中Ni（Ⅱ）浓度先增大后降低,在未达到饱和吸附点时,竹炭的吸附量已达1.17 mg/g。
The effects of bamboo charcoal dose and pH value were investigated.The thermodynamics and kinetics for the adsorption of Ni（Ⅱ） on bamboo charcoal were studied.The results show that the removal rate of Ni（Ⅱ） increases with the increasement of bamboo charcoal dose,and the maximum removal rate is 95.6%.The removal rate of Ni（Ⅱ） is higher when the bamboo charcoal deals with neutral or alkaline wastewater.The secondorder kinetic equation can express the dynamics characteristics of bamboo charcoal adsorbing Ni（Ⅱ）.Bamboo charcoal has certain adsorption capacity for Ni（Ⅱ）,and the smaller is the particle size of bamboo charcoal,the stronger is the adsorption capacity.The adsorption isotherm accords with Langmuir mode.The maximum adsorption amount is 1.0 to 1.3 mg/g.The dynamic experiment indicates that Ni（Ⅱ） concentration of disposal water increases and then decreases.The adsorption amount of bamboo charcoal is 1.17 mg/g before it reaches saturation adsorption.
出处
《非金属矿》
CAS
CSCD
北大核心
2012年第2期63-65,82,共4页
Non-Metallic Mines
基金
国家自然科学基金(40872150)
关键词
竹炭
Ni(Ⅱ)
吸附动力学
吸附热力学
粒径
bamboo charcoal Ni（Ⅱ） adsorption kinetics adsorption thermodynamics particle size
