In this study, papermaking sludge-based flocculant (PSBF) and commercial lignin-based flocculant (LBF) have been synthesized by the same graft copolymerization procedures. The structures of alkaline lignin (AL), commercial lignin and the two flocculants were characterized by the modern analytical methods, also, the molecular weights and charge properties were analyzed. The effects of coagulant/flocculant dosages, pH conditions and coexistent dye auxiliaries on flocculation efficiencies were studied in the treatment of reactive turquoise blue (RTB) and disperse red (DR) dye wastewater. The flocculation experiments indicated that PSBF and LBF performed better in the removals of RTB and DR than commercial PAC and PAM. PSBF and LBF were insensitive to pH variation due to their strong charge neutralizing abilities and bridging effects even with the pH changing. In the existence of dye auxiliaries, PSBF and LBF could also exhibit superior decolorization efficiencies by slightly enlarging their dosages. Furthermore, PSBF and LBF had similar flocculation behaviors under all measured experimental conditions, suggesting that PSBF also had excellent flocculation performances even if it was prepared from papermaking sludge.

在这项研究中，已经通过相同的接枝共聚程序合成了造纸污泥基絮凝剂（PSBF）和商业木质素基絮凝剂（LBF）。用现代分析方法对碱性木质素（AL），商品木质素和两种絮凝剂的结构进行了表征，并对分子量和电荷性质进行了分析。研究了絮凝剂/絮凝剂用量，pH条件和共存的染料助剂对活性蓝绿色（RTB）和分散红（DR）染料废水的絮凝效率的影响。絮凝实验表明，PSBF和LBF去除RTB和DR的性能优于商用PAC和PAM。由于PSBF和LBF即使在pH值变化的情况下也具有很强的电荷中和能力和桥接效应，因此对pH值变化不敏感。在存在染料助剂的情况下，PSBF和LBF可以通过稍微增加其用量来表​​现出优异的脱色效率。此外，PSBF和LBF在所有测量的实验条件下均具有相似的絮凝行为，这表明PSBF即使由造纸污泥制备也具有优异的絮凝性能。