Jain Rajeev, Sikarwar Shalini
Department of Environmental Chemistry, Jiwaji University, Gwalior 474011, India.
J Hazard Mater. 2008 Apr 15;152(3):942-8. doi: 10.1016/j.jhazmat.2007.07.070. Epub 2007 Jul 28.
The present paper is aimed to investigate and develop cheap adsorption methods for color removal from wastewater using waste material sawdust as adsorbent. Sawdust, a biosorbent, was successfully utilized in removing a water soluble azo dye, congored from wastewater. The paper incorporates effect of pH, temperature, amount of adsorbent, contact time, concentration of adsorbate, particle size on adsorption. Specific rate constants of the processes were calculated by kinetic measurements and a first order adsorption kinetics was observed in each case. Langmuir and Freundlich adsorption isotherm models were then applied to calculate thermodynamics parameters as well as to suggest the plausible mechanism of the ongoing adsorption processes. In order to observe the quality of wastewater COD measurements were also carried out before and after the treatments. A significant decrease in the COD values was observed, which clearly indicates that adsorption method offer good potential to remove congored from wastewater.
本文旨在研究和开发使用废料锯末作为吸附剂从废水中去除颜色的廉价吸附方法。锯末作为一种生物吸附剂，已成功用于去除废水中的水溶性偶氮染料刚果红。本文探讨了pH值、温度、吸附剂用量、接触时间、吸附质浓度、粒径对吸附的影响。通过动力学测量计算了该过程的比速率常数，并且在每种情况下均观察到一级吸附动力学。然后应用朗缪尔和弗伦德利希吸附等温线模型来计算热力学参数，并推测正在进行的吸附过程的可能机理。为了观察废水的质量，在处理前后还进行了化学需氧量（COD）测量。观察到COD值显著降低,这清楚地表明吸附法具有从废水中去除刚果红的良好潜力。
