Department of Civil and Environmental Engineering, South Dakota State University, Brookings, SD 57007, USA.
Science and Engineering Department, Tampa Bay Water, Clearwater, FL 33763, USA.
Water Res. 2014 Oct 15;63:285-95. doi: 10.1016/j.watres.2014.06.029. Epub 2014 Jul 1.
Lignin is the most abundant aromatic plant component in terrestrial ecosystems. This study was conducted to determine the contribution of lignin residues in natural water to the formation of disinfection byproducts (DBPs) in drinking water. We investigated the formation of different classes of DBPs from lignin model compounds, lignin polymers, and humic substances using two common disinfection techniques, chlorination and chloramination. The contributions of lignin to the overall formation of DBPs from these organic products were determined based on the observed abundances of individual lignin phenols and their DBP yields. Model lignin phenols generally produced higher trichloroacetic acid (TCAA) yields than chloroform and dichloroacetic acid (DCAA) during chlorination. Lignin phenols generally produced higher DBP yields but lower percentages of unknown total organic halogen compared to bulk humic substances and lignin polymers. The relative significance of lignin phenols as chlorination DBP precursors generally follows the order of TCAA > DCAA&chloroform. The relative significance of lignin phenols to DBP formation by chloramination follows the order: TCAA > DCAA&DCAN > chloroform. Overall, lignin phenols are more important as TCAA precursors than as chloroform and DCAA precursors.
木质素是陆地生态系统中含量最丰富的芳香族植物成分。本研究旨在确定天然水中木质素残留物对饮用水中消毒副产物（DBP）形成的贡献。我们使用两种常见的消毒技术——氯化和氯化氨化，研究了木质素模型化合物、木质素聚合物和腐殖质中不同类别的 DBP 的形成。基于观察到的单个木质素酚的丰度及其 DBP 产率，确定了木质素对这些有机产物形成总 DBP 的贡献。在氯化过程中，模型木质素酚通常比三氯甲烷和二氯乙酸（DCAA）产生更高的三氯乙酸（TCAA）产率。与大宗腐殖质和木质素聚合物相比，木质素酚通常产生更高的 DBP 产率，但未知总有机卤素的百分比较低。木质素酚作为氯化 DBP 前体的相对重要性通常遵循 TCAA > DCAA&chloroform 的顺序。木质素酚对氯化氨化形成 DBP 的相对重要性遵循 TCAA > DCAA&DCAN > 三氯甲烷的顺序。总体而言，木质素酚作为 TCAA 前体比作为三氯甲烷和 DCAA 前体更为重要。
