Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin 150040, PR China.
Carbohydr Polym. 2013 Feb 15;92(2):1497-502. doi: 10.1016/j.carbpol.2012.10.066. Epub 2012 Nov 2.
Waste newspaper fiber (WNF) was separated and modified via grafting quaternary ammonium salt to obtain an adsorbent, which removes Remazol turquoise Blue G-133 (RTB G-133) from aqueous solutions. SEM and IR were used to analyze the morphology and chemical groups of the modified waste newspaper fiber (MWNF). Batch adsorption studies were conducted with varying adsorbent dosages, solution pH, and contact time. Adsorption isotherms and models were fitted. The SEM photographs show the surface of MWNF is smoother in comparison with that of WNF. The IR analysis indicates that the quaternary ammonium salt was successfully grafted onto the cellulose skeleton in WNF and the chemical interaction played an important role in adsorption. Results show that the equilibrium adsorption capacity can be reached within 360 min, and that the maximum adsorption capacity was 260 mg g(-1). The adsorption of RTB G-133 on MWNF was a spontaneous endothermic process and well fitted pseudo-second-order kinetic model and Langmuir adsorption isotherm model. The results show that MWNF is promising for dye wastewater treatment.
废报纸纤维（WNF）经接枝季铵盐分离和改性，得到一种吸附剂，可从水溶液中去除雷玛唑翠蓝 G-133（RTB G-133）。采用 SEM 和 IR 对改性废报纸纤维（MWNF）的形貌和化学基团进行了分析。通过改变吸附剂用量、溶液 pH 值和接触时间进行了批量吸附研究。拟合了吸附等温线和模型。SEM 照片显示 MWNF 的表面比 WNF 更光滑。IR 分析表明，季铵盐已成功接枝到 WNF 中的纤维素骨架上，化学相互作用在吸附中起重要作用。结果表明，平衡吸附容量可在 360 分钟内达到，最大吸附容量为 260mg g(-1)。MWNF 对 RTB G-133 的吸附是一个自发的吸热过程，很好地符合拟二级动力学模型和 Langmuir 吸附等温线模型。结果表明，MWNF 有望用于处理染料废水。
