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Nano-rod Ca-decorated sludge derived carbon for removal of phosphorus

机译:纳米棒钙修饰污泥衍生碳除磷

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摘要

AbstractRecovering phosphorus (P) from waste streams takes the unique advantage in simultaneously addressing the crisis of eutrophication and the shortage of P resource. A novel calcium decorated sludge carbon (Ca-SC) was developed from dyeing industry wastewater treatment sludge by decorating calcium (Ca) to effectively adsorb phosphorus from solution. The X-ray diffraction (XRD) and Fourier transform infrared (FTIR) techniques were used to characterize the Ca-SCs, followed by isotherm and kinetic sorption experiments. A preferred design with CaCO3to sludge mass ratio of 1:2 was found to have a sorption capacity of 116.82 mg/g for phosphorus. This work reveals the crucial role of well-dispersed nano-rod calcium on the Ca-SC surface for the sorption of phosphorus. Moreover, the decoration of nano-rod calcium was found to further promote the uptake of phosphorus through the formation of hydroxylapatite (Ca5(PO4)3(OH)). Thus, the development of decorated Ca-SC for sorption of phosphorus is very important in solving the P pollution and resource loss.Graphical abstractDisplay OmittedHighlightsNano-rod Ca was dispersed on the SC surface.Sludge was converted into sorbent for P nutrient removal.Langmuir model fitted well with the isotherm sorption to P.Pseudo-second order model fitted well with the sorption kinetic to P.Crystallization of P and Ca contribute to the preferable removal mechanisms.Well-dispersed nano-rod calcium decorated sludge carbon performs preferable ability to remove phosphorus.
机译: 摘要 从废物流中回收磷(P)具有独特的优势,可以同时解决富营养化危机和磷资源的短缺。通过修饰钙(Ca)以有效地吸附溶液中的磷,从印染工业废水处理污泥中开发了一种新型钙修饰污泥碳(Ca-SC)。使用X射线衍射(XRD)和傅立叶变换红外(FTIR)技术表征Ca-SCs,然后进行等温和动力学吸附实验。发现CaCO 3 与污泥质量比为1:2的优选设计对磷的吸附容量为116.82 mg / g。这项工作揭示了在Ca-SC表面上分散良好的纳米棒钙对于磷吸附的关键作用。此外,发现装饰纳米棒钙可通过羟基磷灰石的形成进一步促进磷的吸收(Ca 5 (PO 4 3 (OH))。因此,开发修饰的Ca-SC吸附磷对解决磷污染和资源损失具有重要意义。 图形摘要 省略显示 突出显示 纳米棒Ca分散在SC表面。 污泥 Langmuir模型与等温线对P的吸附非常吻合。 < ce:label>• 伪二级模型与P的吸附动力学非常吻合。 P和Ca的结晶有助于首选删除机制。 分散的n阳极杆装饰的钙污泥碳具有较好的除磷能力。

著录项

  • 来源
    《Environmental pollution》 |2018年第2期|698-705|共8页
  • 作者单位

    School of Environmental Science and Engineering, Guangzhou University,Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources,Department of Civil Engineering, The University of Hong Kong;

    School of Environmental Science and Engineering, Guangzhou University;

    Department of Civil Engineering, The University of Hong Kong;

    School of Environmental Science and Engineering, Guangzhou University;

    South China Sea Institute of Oceanology, Chinese Academy of Sciences;

    School of Environmental Science and Engineering, Guangzhou University,Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources;

    School of Environmental Science and Engineering, Guangzhou University,Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources;

    School of Environmental Science and Engineering, Guangzhou University,Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources;

    School of Environmental Science and Engineering, Guangzhou University,Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Phosphorus; Ca decorated sludge carbon; Crystallization; Sorption;

    机译:磷;钙装饰污泥碳;结晶;吸附;
  • 入库时间 2022-08-17 13:25:42

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