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.

中文翻译：

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铝和锰化学改性的木质素从水溶液中吸附Procion Blue MX-R染料。

通过纯化和羧甲基化由生物质生产生物乙醇过程中甘蔗渣的酸水解产生的木质素，可获得大分子CML。与Al（3+）（CML-Al）和Mn（2+）（CML-Mn）络合的CML用于从水溶液中去除纺织染料Procion Blue MX-R（PB）。使用傅里叶变换红外光谱（FTIR），扫描差示量热法（SDC），扫描电子显微镜（SEM）和pHPZC对CML-Al和CML-Mn进行表征。确定的最佳pH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顺序动力学模型和Liu等温线模型中。CML-Al和CML-Mn在298K时的最大吸附容量分别为73.52和55.16mgg（-1）。使用50％丙酮+ 50％的0.05molL（-1）NaOH进行了四个吸附/解吸实验，从负载染料的吸附剂中再生高达98.33％（CML-Al）和98.08％（CML-Mn） 。去除了CML-Al。CML-Mn去除率约为93.97％。75.91％的模拟染厂废水。