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首页> 外文期刊>Mathematical research letters: MRL >Effect of dissolved organic matter on adsorption of sediments to Oxytetracycline: An insight from zeta potential and DLVO theory
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Effect of dissolved organic matter on adsorption of sediments to Oxytetracycline: An insight from zeta potential and DLVO theory

机译：溶解有机物对催产素沉积物吸附的影响：Zeta潜力和DLVO理论的见解

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摘要

To reveal the adsorption mechanism of sediment to antibiotics with the presence of dissolved organic matter (DOM), batch experiments were carried out by oxytetracycline (OTC) on sediments with decayed plants (PDOM) and composted chicken manure (MDOM), and the zeta potential in the system before and after adsorption was measured. Results showed that the PDOM promoted the adsorption process, while the MDOM inhibited the adsorption. Adding PDOM, the change of zeta potential (Delta zeta) increased by 40.08% for first terrace sediments (FT) and 63.98% for riverbed sediments (RB), respectively; meanwhile, MDOM decreased by 20.04% for FT and 28.39% for RB, respectively. The results of kinetic fitting models of replacing the adsorption amount with Delta zeta were consistent with the initial. It indicated that there was a positive correlation between the adsorption amount and Delta zeta, and the zeta potential can be used to quickly judge the degree of adsorption process. The Derjaguin-Landau-Verwey-Overbeek (DLVO) theory describes the interactions of sediment particles. In terms of adsorption amount, zeta potential (absolute value) and total interaction energy all followed the order: RB > FT, RB-PDOM > FT-PDOM, and RB-MDOM > FT-MDOM. The more negative the zeta potential is, the better the dispersion of the particles is. Stronger repulsion is more conducive to adsorbing positively charged OTC. The site energy distribution theory further explained that the distribution of adsorption site in the various states of sediments increased while adding the PDOM and decreased while adding the MDOM.
机译：为了揭示沉积物对抗生素的吸附机制与溶解有机物（DOM）的存在，通过氧化植物（Pom）和堆肥鸡粪（MDom）的沉积物上的催生素（OTC）进行分批实验，以及Zeta电位在测量吸附之前和之后的系统中。结果表明，POD促进了吸附过程，而MDOM抑制了吸附。添加PomD，Zeta潜力（Delta Zeta）的变化分别增加了河床沉积物（FT）的40.08％，河床沉积物（RB）分别为63.98％;同时，FT的FT分别降低了20.04％，分别为RB的28.39％。用Delta Zeta替换吸附量的动力学拟合模型的结果与初始。它表明，吸附量和δζ之间存在正相关，并且Zeta电位可用于快速判断吸附过程。 derjaguin-landau-verwey-verwey-ovebeek（dlvo）理论描述了沉积物粒子的相互作用。在吸附量方面，Zeta电位（绝对值）和总相互作用能量所有顺序：Rb> Ft，RB-Pomen> FT-Pom和RB-MDom> FT-MDom。 ζ电位越负，颗粒的分散越好。更强的排斥更有利于吸附带正电荷的OTC。该网站能量分布理论进一步说明，在添加PDOM的同时增加了各种沉积物状态中的吸附部位的分布，并在添加MDOM的同时降低。

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  • 来源
    《Mathematical research letters: MRL》 |2020年第2期|共13页
  • 作者

    Shen Siqi; Yang Shengke; Jiang Qianli; Luo Mengya; Li Yu; Yang Chunyan; Zhang Dan;

  • 作者单位

    Changan Univ Key Lab Subsurface Hydrol &

    Ecol Arid Areas Minist Educ Xian 710054 Shaanxi Peoples R China;

    Changan Univ Key Lab Subsurface Hydrol &

    Ecol Arid Areas Minist Educ Xian 710054 Shaanxi Peoples R China;

    Changan Univ Key Lab Subsurface Hydrol &

    Ecol Arid Areas Minist Educ Xian 710054 Shaanxi Peoples R China;

    Changan Univ Key Lab Subsurface Hydrol &

    Ecol Arid Areas Minist Educ Xian 710054 Shaanxi Peoples R China;

    Changan Univ Key Lab Subsurface Hydrol &

    Ecol Arid Areas Minist Educ Xian 710054 Shaanxi Peoples R China;

    Changan Univ Key Lab Subsurface Hydrol &

    Ecol Arid Areas Minist Educ Xian 710054 Shaanxi Peoples R China;

    Changan Univ Key Lab Subsurface Hydrol &

    Ecol Arid Areas Minist Educ Xian 710054 Shaanxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 数学;
  • 关键词

    Adsorption; Oxytetracycline; DOM; Zeta potential; DLVO theory; Site energy distribution theory;

    机译：吸附;氧化素;DOM;Zeta潜力;DLVO理论;网站能量分配理论;

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