Microwave-assisted activated carbon obtained from the sludge of tannery-treatment effluent plant for removal of leather dyes
Microwave-assisted activated carbon obtained from the sludge of tannery-treatment effluent plant for removal of leather dyes
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DOI：
10.1016/j.colsurfa.2016.05.059
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发表时间：
2016-09
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影响因子：
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通讯作者：
M. J. Puchana-Rosero;M. Adebayo;E. Lima;F. M. Machado;P. S. Thue;J. C. Vaghetti;C. S. Umpierres;M. Gutterres
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文献类型：
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作者：
M. J. Puchana-Rosero;M. Adebayo;E. Lima;F. M. Machado;P. S. Thue;J. C. Vaghetti;C. S. Umpierres;M. Gutterres
采用微波加热法对制革废水处理厂污泥进行化学活化制备活性炭。将污泥与ZnCl 2和石灰混合以形成糊状物，将其插入石英反应器内并在N2下通过微波照射10 min。热解后，将热解材料用6.0 mol L-1HCl回流以获得活性炭（AMWCTS）。采用SEM、FTIR、TGA、XRD、BET和BJH等分析技术对AMWCTS进行了表征。研究了298 K下AMWCTS对酸性黑210（AB-210）和酸性红357（AR-357）皮革染料的吸附pH、动力学和平衡。动力学数据最好地拟合Avrami动力学模型。AMWCTS对AR-357和AB-210的最大吸附容量分别为589.5和1108 mg g−1。最后，使用模拟废水（染料的复杂混合物）测试AMWCTS，获得至少93.79%的吸附效率，显示AMWCTS作为吸附剂处理真实的废水的潜力。
An activated carbon was prepared by chemical activation of the sludge collected from tannery wastewater treatment plant (TWTP) using microwave heating. The sludge was mixed with ZnCl2and lime to form a paste, which was inserted inside a quartz reactor and irradiated by microwave for 10 min under N2. After the pyrolysis, the carbonized material was refluxed with a 6.0 mol L−1HCl to obtain the activated carbon (AMWCTS). The AMWCTS was characterized by SEM, FTIR, TGA, XRD, BET and BJH analytical techniques. AMWCTS has high BET surface area of 491.0 m2g−1and total pore volume of 0.440 cm3g−1with mesoporous pore size distribution.The studies of pH, kinetic and equilibrium for adsorption of Acid Black 210 (AB-210) and Acid Red 357 (AR-357) leather dyes onto AMWCTS were investigated at 298 K. The kinetic data were best fitted to the Avrami kinetic model. The maximum sorption capacities of AMWCTS for AR-357 and AB-210 are 589.5 and 1108 mg g−1, respectively.Finally, the AMWCTS was tested using simulated effluents (complex mixture of dyes), obtaining an adsorption efficiency of at least 93.79%, showing the potentiality of AMWCTS as adsorbent for treatment real effluents.