用铝和锰改性的木质素从水溶液中吸附活性艳蓝 MX-R 染料。
Adsorption of Procion Blue MX-R dye from aqueous solutions by lignin chemically modified with aluminium and manganese.
机构信息
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil; Department of Chemical Sciences, Ajayi Crowther University, PMB 1066 Oyo, Oyo State, Nigeria.
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil.
出版信息
J Hazard Mater. 2014 Mar 15;268:43-50. doi: 10.1016/j.jhazmat.2014.01.005. Epub 2014 Jan 8.
A macromolecule, CML, was obtained by purifying and carboxy-methylating the lignin generated from acid hydrolysis of sugarcane bagasse during bioethanol production from biomass. The CMLs complexed with Al(3+) (CML-Al) and Mn(2+) (CML-Mn) were utilised for the removal of a textile dye, Procion Blue MX-R (PB), from aqueous solutions. CML-Al and CML-Mn were characterised using Fourier transform infrared spectroscopy (FTIR), scanning differential calorimetry (SDC), scanning electron microscopy (SEM) and pHPZC. The established optimum pH and contact time were 2.0 and 5h, respectively. The kinetic and equilibrium data fit into the general order kinetic model and Liu isotherm model, respectively. The CML-Al and CML-Mn have respective values of maximum adsorption capacities of 73.52 and 55.16mgg(-1) at 298K. Four cycles of adsorption/desorption experiments were performed attaining regenerations of up to 98.33% (CML-Al) and 98.08% (CML-Mn) from dye-loaded adsorbents, using 50% acetone+50% of 0.05molL(-1) NaOH. The CML-Al removed ca. 93.97% while CML-Mn removed ca. 75.91% of simulated dye house effluents.
通过从生物乙醇生产过程中生物质酸水解产生的蔗渣木质素中纯化和羧甲基化得到一种高分子量物质 CML。将 CML 与 Al(3+)（CML-Al）和 Mn(2+)（CML-Mn）络合，用于从水溶液中去除一种纺织染料 Procion Blue MX-R（PB）。采用傅里叶变换红外光谱（FTIR）、扫描差示热分析（SDC）、扫描电子显微镜（SEM）和 pHpZC 对 CML-Al 和 CML-Mn 进行了表征。确定的最佳 pH 值和接触时间分别为 2.0 和 5h。动力学和平衡数据分别拟合到一般级数动力学模型和 Liu 等温线模型。CML-Al 和 CML-Mn 在 298K 时的最大吸附容量分别为 73.52 和 55.16mgg(-1)。在吸附/解吸实验的四个循环中，使用 50%丙酮+50% 0.05molL(-1)NaOH，从负载染料的吸附剂中分别再生了 98.33%（CML-Al）和 98.08%（CML-Mn）。CML-Al 去除了约 93.97%，而 CML-Mn 去除了约 75.91%的模拟染料厂废水。
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