废轮胎热解炭黑制备活性炭及处理染料废水

分别采用H₂SO₄和NaOH对废轮胎热解炭黑进行改性处理，考察炭黑与改性剂固液比对染料废水脱色率的影响.实验结果表明，炭黑与H₂SO₄固液比1g/15mL时得到HBC（酸改性活性炭）处理酸性湖蓝溶液，脱色率最高；炭黑与NaOH固液比1g/10mL时得到NBC（碱改性活性炭）处理碱性湖蓝溶液，脱色效果最好.溶液的酸性越强，越有利于HBC对酸性湖蓝溶液的脱色效果；而溶液的碱性增大，有助于提高NBC对碱性湖蓝的脱色率.此外，HBC对酸性湖蓝与NBC对碱性湖蓝的吸附反应变化趋势非常接近，整个吸附反应迅速，20min后基本达到吸附反应平衡.HBC吸附酸性湖蓝和NBC吸附碱性湖蓝的过程均符合准二级动力学方程.对改性前后的固体物质进行了扫描电镜，红外光谱及比表面积分析.

Preparation of activated carbon from waste tire pyrolysis carbon black and its treatment of dyeing wastewater

China is the world's largest consumer of rubber, the annual production of more than 400million waste tires. Pyrolysis of waste tyre is a recycling route with high value-added and environmentally friendly. The higher color of dye wastewater has a serious impact on the ecological environment. In this paper, H₂SO₄ and NaOH were used to modify the pyrolytic carbon black of waste tire. The experimental results showed that when the ratio of carbon black to H₂SO₄ was 1g/15mL, the best decolorization rate of acid lake blue solution was obtained over HBC. Also, NBC obtained with the ratio of carbon black to NaOH 1g/10mL was good for treating basic lake blue solution. The stronger the acidity of the solution, the better the decolorization effect of HBC on the acid lake blue solution. On the contrary, the stronger the alkalinity of the solution, the better the NBC on the basic lake blue solution. In addition, the adsorption process of acid lake blue over HBC and alkaline lake blue over NBC was very close. The whole adsorption reaction was very fast. After 20min, the adsorption equilibrium was basically reached. The adsorption process of acid lake blue over HBC and alkaline lake blue over HBC conform to the pseudo second-order kinetic equation. The properties of scanning electron microscope, infrared spectrum and specific surface area of solid materials before and after modification were analyzed.