Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
J Colloid Interface Sci. 2014 Mar 1;417:420-30. doi: 10.1016/j.jcis.2013.11.067. Epub 2013 Dec 4.
Rubber tire activated carbon modification (RTACMC) and rubber tire activated carbon (RTAC) were prepared from waste rubber tire by microwave assisted chemical treatment and physical heating respectively. A greater improvement in porosity and total pore volume was achieved in RTACMC as compared to that of RTAC. But both have a predominantly mesoporous structure. Under identical operating conditions, an irradiation time of 10 min, chemical impregnation ratio of 1.50 and a microwave power of 600 W resulted in maximizing the efficiency of RTACMC for p-cresol (250 mg/g) at a contact time of 90 min while RTAC showed a 71.43 mg/g adsorption capacity at 150 min. Phenol, due to its higher solubility was adsorbed to a lesser extent by both adsorbents. Physical nature of interactions, pore diffusion mechanism and exothermicity of the adsorption process was operative in both adsorbents. The outcomes support the feasibility of preparing high quality activated carbon from waste rubber tire by microwave assisted chemical activation.
橡胶轮胎活性炭改性（RTACMC）和橡胶轮胎活性炭（RTAC）分别通过微波辅助化学处理和物理加热由废橡胶轮胎制备。与 RTAC 相比，RTACMC 的孔隙率和总孔体积有了更大的提高。但两者都具有主要的中孔结构。在相同的操作条件下，辐照时间为 10 分钟，化学浸渍比为 1.50，微波功率为 600 W，在接触时间为 90 分钟时，RTACMC 对对甲酚（250 mg/g）的效率达到最大，而 RTAC 在 150 分钟时的吸附容量为 71.43 mg/g。由于酚的溶解度较高，两种吸附剂对其的吸附程度都较低。吸附过程中的相互作用的物理性质、孔扩散机制和放热性都在两种吸附剂中起作用。这些结果支持了通过微波辅助化学活化从废橡胶轮胎制备高质量活性炭的可行性。
