An adsorbent with a high adsorption capacity obtained from the cellulose sludge of industrial residues

详细信息    查看全文

• 作者：G&eacute ; ssica Orlandi^a ; J&eacute ; ssica Cavasotto^a ; Francisco R.S. Machado Jr.^b ; Gustavo L. Colpani^a ; Jacir Dal Magro^c ; Francieli Dalcanton^d ; Josiane M.M. Mello^c ; ^d ; Má ; rcio A. Fiori^c ; ^d ; ^{fiori@unochapeco.edu.br}
• 关键词：Coal from cellulose sludge ; Cellulose residues ; Coal from residues ; Coal adsorbent
• 刊名：Chemosphere
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：169
• 期：Complete
• 页码：171-180
• 全文大小：2085 K
• 卷排序：169

文摘

One of the major problems in effluent treatment plants of the cellulose and paper industry is the large amount of residual sludge generated. Therefore, this industry is trying to develop new methods to treat such residues and to use them as new products, such as adsorbents. In this regard, the objective of this work was to develop an adsorbent using the raw activated sludge generated by the cellulose and paper industry. The activated cellulose sludge, after being dried, was chemically activated with 42.5% (v/v) phosphoric acid at 85 °C for 1 h and was charred at 500 °C, 600 °C and 700 °C for 2 h. The efficiency of the obtained adsorbent materials was evaluated using kinetic tests with methylene blue solutions. Using the adsorption kinetics, it was verified that the three adsorbents showed the capacity to adsorb dye, and the adsorbent obtained at a temperature of 600 °C showed the highest adsorption capacity of 107.1 mg g−1. The kinetic model that best fit the experimental data was pseudo-second order. The Langmuir-Freudlich isotherm adequately described the experimental data. As a result, the cellulose sludge generated by the cellulose and paper industries could be used as an adsorbent.