摘要
用不同的酸碱溶液处理竹炭,研究改性竹炭颗粒对水溶液中孔雀绿的吸附效果,再对筛选出的竹炭颗粒进行吸附动力学试验,并用准二级动力学模型和颗粒扩散模型对试验数据进行拟合,在此基础上进一步探讨影响吸附过程的因素。试验结果表明,用0.5 mol.L-1NaOH溶液处理过的竹炭颗粒吸附效果最佳,最大吸附量可达9.96 mg.g-1。颗粒扩散模型能更好地描述吸附动力学过程。竹炭颗粒的质量增加会降低孔雀绿分子的扩散速率;孔雀绿溶液的初始浓度增加则提高孔雀绿分子的扩散速率;颗粒直径、搅拌速度以及溶液的初始pH值也会影响吸附过程。
The ability of bamboo charcoal particles as absorbent has been well proved.Bamboo charcoals treated with different acid and alkaline solutions were used to study effectiveness of their particles adsorbing malachite green in aqueous solutions and further adsorption kinetics of the bamboo charcoal particles screened out in the preceding study.And then the resultant data were fitted with the pseudo-second order kinetic model and particle diffusion model.On such a basis,factors affecting the adsorption process were explored.Results show that the bamboo charcoal particles modified with 0.5 mol·L^-1 NaOH solution were the most effective in adsorbing malachite green,adsorbing as much as 9.96 mg·g^-1.The particle diffusion model can better describe the kinetic process of adsorption.The mass and size of bamboo charcoal particles,the initial concentration of malachite green in the solution,agitation speed and the initial pH value of the aqueous solution are all potential factors affecting the adsorption process.
出处
《生态与农村环境学报》
CAS
CSSCI
CSCD
北大核心
2010年第6期591-595,共5页
Journal of Ecology and Rural Environment
基金
国家水体污染控制与治理科技重大专项(2008ZX07103-003)
安徽省自然科学基金(070415208)
关键词
改性竹炭颗粒
孔雀绿溶液
颗粒扩散模型
吸附动力学
modified bamboo-carbon particle
aqueous solution of malachite green
particle diffusion model
adsorption kinetics
