酵母球吸附水中对硝基苯胺的行为研究

[目的]研究酵母球吸附水中对硝基苯胺的吸附热力学特征.[方法]测定pH、温度以及酵母空心球的用量对对硝基苯胺吸附行为的影响.[结果]温度对硝基苯胺的平衡吸附量的影响不大,在小范围随温度的升高而降低.pH在2.0 ～8.0范围内,对硝基苯胺都有较高的吸附量.酵母球用量对对硝基苯胺的吸附在一定范围内呈正比,直至达到饱和.对硝基苯胺在酵母空心球上的吸附等温线都能很好地利用Freundlich方程进行拟合,吸附为放热反应且为优惠型吸附,其吸附行为为自发、放热的熵减少过程.[结论]空心球表面有大量的亲水性和疏水性基团.它的两亲属性和特定的化学官能团表明,它是一种潜在的优秀吸附剂.

Study on Adsorption Behavior of P-nitroaniline from Aqueous Solution by Amphiphilic Hollow Carbonaceou Microspheres

[Objective] The research aimed to study the adsorption behavior of P-nitroaniline from aqueous solution onto Amphiphilic carbonaceous microspheres.[Method] The effects of pH,temperature and the amount of carbonaceous microspheres on adsorption behavior were investigated.[Result] Adsorption amount and temperature had little effects,and in a small range with the temperature raise and lower.PHCSs had higher adsorption capacity as pH in the range of 2.0-8.0.PHCSs dosage on the P-nitroaniline adsorption within a certain range proportion,until it reached saturation.The adsorption isotherms of P-nitroaniline appeared to be nonlinear and obeyed to Freundlich equation very well.[Conclusion] The amphiphilic property and the specific chemical composition of the PHCSs made them be an excellent potential sorbent.