Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India.
Environ Sci Pollut Res Int. 2013 Mar;20(3):1261-8. doi: 10.1007/s11356-012-0950-9. Epub 2012 May 10.
Because of the continuous production of large amount of waste tires, the disposal of waste tires represents a major environmental issue throughout the world. This paper reports the utilization of waste tires (hard-to-dispose waste) as a precursor in the production of activated carbons (pollution-cleaning adsorbent). In the preparation of activated carbon (AC), waste rubber tire (WRT) was thermally treated and activated. The tire-derived activated carbon was characterized by means of scanning electron microscope, energy-dispersive X-ray spectroscopy, FTIR spectrophotometer, and X-ray diffraction. In the IR spectrum, a number of bands centred at about 3409, 2350, 1710, 1650, and 1300-1000 cm(-1) prove the present of hydroxyl and carboxyl groups on the surface of AC in addition to C═C double bonds. The developed AC was tested and evaluated as potential adsorbent removal of chromium (III). Experimental parameters, such as contact time, initial concentration, adsorbent dosage and pH were optimized. A rapid uptake of chromium ions was observed and the equilibrium is achieved in 1 h. It was also found that the adsorption process is pH dependent. This work adds to the global discussion of the cost-effective utilization of waste rubber tires for waste water treatment.
由于大量废旧轮胎的不断产生，废旧轮胎的处理成为了全世界主要的环境问题。本文报告了将废旧轮胎（难处理废物）用作生产活性炭（污染清洁吸附剂）前体的利用。在活性炭（AC）的制备中，对废橡胶轮胎（WRT）进行了热处理和活化。通过扫描电子显微镜、能谱仪、傅里叶变换红外光谱仪和 X 射线衍射对轮胎衍生的活性炭进行了表征。在红外光谱中，大约 3409、2350、1710、1650 和 1300-1000 cm(-1) 处的许多带证明了除了 C═C 双键之外，活性炭表面还存在羟基和羧基。开发的 AC 被测试并评估为潜在的吸附剂，用于去除铬（III）。优化了接触时间、初始浓度、吸附剂用量和 pH 等实验参数。观察到铬离子的快速吸收，1 小时内达到平衡。还发现吸附过程受 pH 值影响。这项工作为全球范围内如何利用废旧橡胶轮胎进行废水处理的成本效益提供了讨论。
