Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan, 250100, Shandong, People's Republic of China.
Environ Sci Pollut Res Int. 2018 Jan;25(3):2083-2095. doi: 10.1007/s11356-017-0835-z. Epub 2017 Dec 3.
A novel lignin-based flocculant (LBF) with superior flocculation performance was prepared from paper mill sludge in this work. The functional groups of LBF and alkaline lignin (AL) were determined by Fourier transform infrared spectroscopy (FTIR). The flocculation performance of LBF integrated with polyaluminum chloride (PAC) was tested in reactive dye wastewater treatment. Floc properties and color removals in multiple flocculation systems were discussed. Results indicated that the dye removal (93%) was greatly facilitated as the LBF was integrated with PAC (PAC + LBF). In addition, floc properties and color removals were significantly improved in the presence of Ca and Mg. In contrary, flocculation performance was greatly restricted in the presence of SO. LBF was less pH sensitive and shear sensitive than polyacrylamide (PAM) due to the enhanced charge neutralization and bridging action. On the basis of that, LBF could be used as a promising flocculant in dye wastewater treatment.
本工作从造纸厂污泥中制备出具有优异絮凝性能的新型木质素基絮凝剂（LBF）。通过傅里叶变换红外光谱（FTIR）确定了 LBF 和碱性木质素（AL）的官能团。测试了 LBF 与聚合氯化铝（PAC）结合在活性染料废水处理中的絮凝性能。讨论了多种絮凝体系中的絮体性质和去除率。结果表明，LBF 与 PAC 结合（PAC+LBF）极大地促进了染料的去除（93%）。此外，在 Ca 和 Mg 的存在下，絮体性质和去除率显著提高。相反，在 SO 的存在下，絮凝性能受到很大限制。由于增强的电荷中和和桥联作用，LBF 的 pH 敏感性和剪切敏感性均低于聚丙烯酰胺（PAM）。基于此，LBF 可用作染料废水处理中一种有前途的絮凝剂。
