Investigating the pollutant-removal performance and DOM characteristics of rainfall surface runoff during different ecological concrete revetments treatment
Investigating the pollutant-removal performance and DOM characteristics of rainfall surface runoff during different ecological concrete revetments treatment
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DOI：
10.1016/j.ecolind.2018.07.033
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发表时间：
2019-10
影响因子：
6.9
通讯作者：
Dong-hai Yuan;Lijun Cui;Yechen An;Bin Chen;Xu-jing Guo;Yan Li;R. Zhao;S. Cui;Sisi Wang;Yingying Kou
中科院分区：
文献类型：
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作者：
Dong-hai Yuan;Lijun Cui;Yechen An;Bin Chen;Xu-jing Guo;Yan Li;R. Zhao;S. Cui;Sisi Wang;Yingying Kou
采用4种不同类型的生态混凝土（EC），包括一种应用型混凝土（AC）和3种改性混凝土（MC 1-MC 3），研究其对降雨地表径流的去除性能及其对溶解性有机物（DOM）变化的影响。结果表明，MC 3的净水效果最好，对总氮（TN）、总磷（TP）、氨氮（NH 4 +-N）、总有机碳（TOC）和总悬浮物（TSS）的去除率分别为58.08%、95.57%、92.44%、91.72%和87.62%。荧光激发-发射矩阵（EEM）光谱结合平行因子分析（PARAFAC）能够识别五个荧光组分（C1-5），包括三个类腐殖酸组分（C1，C3和C4）和两个类蛋白质组分（C2和C5）。与活性炭相比，三种微囊藻均能更有效地去除小分子量的类蛋白质组分C2和高分子量的类腐殖酸组分C1、C3和C4。二维相关光谱（2D-COS）结果表明，类蛋白质组分比类腐殖酸组分具有更高的敏感性。在330，305，410，和410 nm处的荧光成分被发现与AC，MC 1，MC 2，和MC 3中的优先变化，分别表明富里酸类，蛋白质类，腐殖酸类，和腐殖酸类物质可以被优先去除的AC，MC 1，MC 2，和MC 3。该研究对改善农村雨水地表径流净化效果、减少农业面源污染具有一定的参考价值。
Four different types of ecological concrete (EC), including an applied concrete (AC), and three kinds of modified concretes (MC1-MC3) were used to study the removal performance of rainfall surface runoff and their impacts on changes in dissolved organic matter (DOM). The results showed that MC3 indicated the best performance of water purification; the removal ratios of total nitrogen (TN), total phosphorus (TP), ammonia nitrogen (NH4+-N), total organic carbon (TOC), and total suspended solids (TSS) were 58.08%, 95.57%, 92.44%, 91.72%, and 87.62%, respectively. Fluorescence excitation-emission matrix (EEM) spectroscopy combined with parallel factor analysis (PARAFAC) was able to identify five fluorescent components (C1-5), including three humic-like components (C1, C3, and C4) and two protein-like components (C2 and C5). The three MCs could more effectively remove both small-molecular-weight protein-like component C2 and high-molecular-weight humic-like components C1, C3, and C4, compared to the AC. The result of two-dimensional correlation spectroscopy (2D-COS) showed that protein-like components had higher susceptibility than humic-like substances did. Fluorescent components at 330, 305, 410, and 410 nm were found with a preferential change in the AC, MC1, MC2, and MC3 respectively, suggesting that fulvic-like, protein-like, humic-like, and humic-like substances can be removed preferentially in the AC, MC1, MC2, and MC3 respectively. This study is valuable for improving surface runoff purification of rainwater in rural areas and for reducing agricultural non-point source pollution.