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Characterization and predicting DOM treatability by enhanced coagulation

机译：通过增强凝血功能表征和预测DOM可治疗性

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摘要

The dissolved organic matter (DOM) plays significant role in water safety due to not only the natural occurrence but also man-induced pollution. To characterize and predict DOM treatability becomes therefore a very important and hot topic. In this paper, enhanced coagulation by four typical coagulants (FeCl_3, Al_2(SO_4)_3, polyaluminum chloride (PAC) and high performance polyaluminum chloride (HPAC)) without pH control was characterized using the chemical fractionation (resin adsorption, RA) and physical fractionation (high performance size exclusion chromatography (HPSEC) combined with peak fitting technique). The results show that the DOM removal can be separated into two stages, rapid removal and continual slow removal. The PAC exhibits efficient removal in the rapid part while the traditional salts are more efficient in the latter part. It is also very important for pH control to improve DOM removal by the traditional coagulants. DOM treatability per unit dosage (1 × 10~(-4) mol/l) for the four coagulants was then calculated in the order of HPAC (26.0%) > PAC (17.3%) > FeCl_3 (14.3%) > Al_2(SO_4)_3 (12.0%). Two sets of DOM treatability models, i.e. removal efficiency, for enhanced coagulation of the four coagulants were developed by combining the chemical and physical DOM fractions based on the quantitative analysis of the removal state of raw water. The two sets of models could be transformed to each other. The composition of the removable DOM by enhanced coagulation of the four coagulants was revealed and validated using 29 raw waters (in 13 source waters in three seasons), and as a result the low deviation indicated that the predicted data matched well with the actual data. It provided the possibility for the application in practical operation of water plant.
机译：溶解有机物（DOM）不仅由于自然发生，而且由于人为污染而在水安全中起着重要作用。因此，表征和预测DOM可治疗性成为一个非常重要且热门的话题。在本文中，通过化学分馏（树脂吸附，RA）和物理分离来表征四种不受pH控制的典型混凝剂（FeCl_3，Al_2（SO_4）_3，聚氯化铝（PAC）和高性能聚氯化铝（HPAC））的增强混凝作用。分馏（高效尺寸排阻色谱法（HPSEC）与峰拟合技术相结合）。结果表明，DOM去除可分为两个阶段：快速去除和持续缓慢去除。 PAC在快速部分显示出有效去除效果，而传统盐在后部分显示出更高的去除效果。对于pH控制而言，改善传统混凝剂对DOM的去除也非常重要。然后按HPAC（26.0％）> PAC（17.3％）> FeCl_3（14.3％）> Al_2（SO_4）的顺序计算四种凝结剂的每单位剂量（1×10〜（-4）mol / l）的DOM可治疗性。 ）_3（12.0％）。基于对原水去除状态的定量分析，通过结合化学和物理DOM组分，开发了两种用于增强四种混凝剂凝结的DOM可处理性模型，即去除效率。两组模型可以相互转换。通过使用29种原水（三个季节在13个源水中），通过四种凝结剂的增强凝结，揭示了可去除DOM的组成并进行了验证，结果，低偏差表明预测数据与实际数据非常吻合。这为水厂实际运行中的应用提供了可能性。

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  • 来源
    《Water science & technology》 |2013年第1期|147-157|共11页
  • 作者

    Dongsheng Wang; Jiankun Xie; Chris W. K. Chow; Linan Xing; John van Leeuwen;

  • 作者单位

    State Key Lab of Environmental Aquatic Chemistry,RCEES, Chinese Academy of Sciences,Beijing 100085,China,SA water Centre for water Management and Reuse,NBE, University of South Australia,Australia;

    Australian water Quality Centre,250 Victoria Square,Adelaide, SA 5000,Australia;

    State Key Lab of Environmental Aquatic Chemistry,RCEES, Chinese Academy of Sciences,Beijing 100085,China,Australian water Quality Centre,250 Victoria Square,Adelaide, SA 5000,Australia,SA water Centre for water Management and Reuse,NBE, University of South Australia,Australia;

    State Key Lab of Environmental Aquatic Chemistry,RCEES, Chinese Academy of Sciences,Beijing 100085,China;

    SA water Centre for water Management and Reuse,NBE, University of South Australia,Australia;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    chemical fractionation; DOM; enhanced coagulation; modeling; physical fractionation; treatability;

    机译：化学分馏DOM;增强凝血;造型;物理分级可治疗性;

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