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首页> 外文期刊>Separation and Purification Technology >Exploring and comparing the roles of Ca2+ and Mg2+ in small-sized natural organics-induced charged nanofiltration membrane fouling
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Exploring and comparing the roles of Ca2+ and Mg2+ in small-sized natural organics-induced charged nanofiltration membrane fouling

机译：Ca2 +和Mg2 +在小型天然有机物诱导的带电纳滤膜污垢中的探索和比较CA2 +和MG2 +的作用

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摘要

This study was conducted to systematically investigate how Ca2+/Mg2+ interacted with the preserved humic acid components after UF filtration (PHACUF) to cause fouling of nanofiltration (NF) membrane. Inherent characteristics including molecular weight distribution, charge, wettability, hydrodynamic size of PHACUF and its fractions under predetermined conditions and differences in PHACUF-induced NF membrane fouling behaviors, surface characteristics in the absence/presence of Ca2+/Mg2+ were analysed and explored, respectively. Microinteraction forces between PHACUF and Ca2+/Mg2+ were also compared. The results manifested that contrary to many typical reports about HA foulant, Mg2+ exhibited superior charge screening effect with PHACUF, and performance in accelerating hydrodynamic colloid size, dense membrane fouling compared to Ca2+. O 1s bonding energy shift and ITC data provided powerful and quantified evidences that Mg2+ could coordinate with PHACUF more effectively and cause more serious fouling deposits on NF membrane surfaces than Ca2+, presumably due to its favorable specific charge and binding ability. In terms of its own components, HOA fraction seems destined to preferentially bond with most of Ca2+ and Mg2+ ions and constitute a high proportion of membrane fouling loading because it possesses the highest charge density and content compared with other fractions in near-actual natural surface water circumstance.
机译：进行该研究以系统地研究Ca2 + / mg2 +在UF过滤后与保存的腐殖酸成分相互作用，以引起纳米滤膜（NF）膜的污垢。在预定条件下，Phacuf的分子量分布，电荷，润湿性，流体动力学尺寸的固有特性和Phacuf诱导的NF膜污染行为的差异，分别分别分析和探索了Ca2 + / mg2 +的不存在/存在的表面特征。比较PHACUF和Ca2 + / mg2 +之间的微互动力。结果表明，与HA污染的许多典型报告相反，MG2 +与PHACUF表现出优异的电荷筛选效果，与加速水动力胶体尺寸的性能，与Ca2 +相比加速致密膜污垢。 o 1s键合能量换档和ITC数据提供了强大和量化的证据，即Mg2 +可以更有效地与Phacuf协调，并在NF膜表面上引起比Ca2 +更严重的污垢沉积物，可能是由于其有利的特定电荷和结合能力。就其自身的组成部分而言，HOA部分似乎注定与大多数Ca2 +和Mg2 +离子合并，并且构成高比例的膜污垢负荷，因为它具有最高的电荷密度和含量与近乎实际的天然地面水中的其他部分相比环境。

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  • 作者

    Song Yuefei; Li Xifan; Li Chen; Li Jingmai; Dong Zhaoqi; Zhang Mengnan; Qi Pengfei; Bai Xueshuang; Jiang Kai;

  • 作者单位

    Henan Normal Univ Sch Environm Key Lab Yellow River &

    Huai River Water Environm Henan Key Lab Environm Pollut Control Minist Educ 46 East Construct Rd Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Sch Environm Key Lab Yellow River &

    Huai River Water Environm Henan Key Lab Environm Pollut Control Minist Educ 46 East Construct Rd Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Sch Environm Key Lab Yellow River &

    Huai River Water Environm Henan Key Lab Environm Pollut Control Minist Educ 46 East Construct Rd Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Sch Environm Key Lab Yellow River &

    Huai River Water Environm Henan Key Lab Environm Pollut Control Minist Educ 46 East Construct Rd Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Sch Environm Key Lab Yellow River &

    Huai River Water Environm Henan Key Lab Environm Pollut Control Minist Educ 46 East Construct Rd Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Sch Environm Key Lab Yellow River &

    Huai River Water Environm Henan Key Lab Environm Pollut Control Minist Educ 46 East Construct Rd Xinxiang 453007 Henan Peoples R China;

    Qingdao Univ Coll Mat Sci &

    Engn Collaborat Innovat Ctr Marine Biobased Fibers &

    E State Key Lab Biofiber &

    Ecotext Inst Marine Biob 308 Ningxia Rd Qingdao 266071 Peoples R China;

    Henan Normal Univ Sch Environm Key Lab Yellow River &

    Huai River Water Environm Henan Key Lab Environm Pollut Control Minist Educ 46 East Construct Rd Xinxiang 453007 Henan Peoples R China;

    Henan Normal Univ Sch Environm Key Lab Yellow River &

    Huai River Water Environm Henan Key Lab Environm Pollut Control Minist Educ 46 East Construct Rd Xinxiang 453007 Henan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分离过程;气化工艺;
  • 关键词

    Small-sized natural organics; Nanofiltration membrane fouling; Comparative analysis; Divalent cations; Influencing mechanisms;

    机译：小型天然有机物;纳滤膜污垢;比较分析;二价阳离子;影响机制;

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