Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan, Shandong 250100, People's Republic of China.
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan, Shandong 250100, People's Republic of China.
Bioresour Technol. 2017 Sep;240:59-67. doi: 10.1016/j.biortech.2017.02.088. Epub 2017 Feb 21.
In this study, papermaking sludge was used as the raw biomass material to produce the lignin-based flocculant (LBF) by grafting quaternary ammonium groups and acrylamide. LBF was used as a coagulant aid with polyaluminum chloride (PAC) to treat reactive and disperse dyes wastewater. Effects of dosing method, pH, hardness and stirring speed on the coagulation behavior and floc properties were studied. Results showed that the superior coagulation efficiency and recovery factor were achieved by PAC+LBF compared with PAC and LBF+PAC. The primary mechanisms of LBF in the treatment of disperse and reactive dye solutions were charge neutralization and bridging effect, respectively. In the dual-coagulation, the impact of pH on the coagulation efficiency was weak during pH range of 5-9. Moderate hardness could enhance the floc properties due to the decrease of electrostatic repulsion and the chelation of Ca(II) and LBF. Besides, flocs coagulated by PAC+LBF had a stronger anti-crush ability.
在这项研究中，造纸污泥被用作原始生物质材料，通过接枝季铵基团和丙烯酰胺来生产基于木质素的絮凝剂（LBF）。LBF 被用作助凝剂与聚合氯化铝（PAC）一起处理活性和分散染料废水。研究了投加方式、pH 值、硬度和搅拌速度对混凝行为和絮体特性的影响。结果表明，PAC+LBF 比 PAC 和 LBF+PAC 具有更高的混凝效率和回收率。LBF 在处理分散和活性染料溶液中的主要机制分别是电荷中和和桥接作用。在双重混凝中，pH 值在 5-9 范围内对混凝效率的影响较弱。适度的硬度可以通过降低静电排斥和 Ca(II)与 LBF 的螯合作用来增强絮体特性。此外，PAC+LBF 混凝的絮体具有更强的抗破碎能力。
