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首页> 外文期刊>Environmental Engineering Science >Synthesis of Activated Carbon from Citric Acid Residue by Phosphoric Acid Activation for the Removal of Chemical Oxygen Demand from Sugar-Containing Wastewater
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Synthesis of Activated Carbon from Citric Acid Residue by Phosphoric Acid Activation for the Removal of Chemical Oxygen Demand from Sugar-Containing Wastewater

机译：磷酸活化由柠檬酸残渣合成活性炭以去除含糖废水中的化学需氧量

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摘要

Over 2 million tons of citric acid residue (CAR) are generated from citric acid production in China each year. Thus, it is of great significance to find a suitable method for recycling the waste products of citric acid fermentation. Herein, activated carbon (AC) samples were prepared from CAR with phosphoric acid activation. Effects of impregnation ratio, activation time, and activation temperature on pore structure and surface functional group formation were evaluated. AC prepared by 1.5 h of pyrolysis in nitrogen at 550 degrees C from CAR and phosphoric acid at an impregnation ratio of 2.0 (CAR-AC-2.0) had the largest specific surface area (786 m(2)/g) and total pore volume (0.71 mL/g). The surface morphologies and chemical properties of AC samples were characterized by scanning electron microscopy, thermogravimetric analysis, elemental analysis, and Fourier transform infrared spectroscopy (FTIR), and their adsorption capacities for methylene blue (MB) and iodine were tested. There were rare functional groups on the surfaces of CAR-AC-2.0, and the adsorption amounts of CAR-AC-2.0 for iodine and MB reached up to 729 and 121 mg/g, respectively. CAR-AC-2.0 was an ideal adsorbent for removing organic matters from solutions and wastewater. Adsorption efficiency of CAR-AC-2.0 for chemical oxygen demand (COD) from sugar-containing wastewater was 291.6 mg/g, and the removal efficiency was 80.9% when the dosage was 15 g/L. This study provided a new strategy for removing COD from fermentation wastewater with high efficiency and low cost.
机译：每年中国柠檬酸生产中产生超过200万吨的柠檬酸残留物（CAR）。因此，找到一种合适的方法来回收柠檬酸发酵的废产物具有重要意义。在此，从具有磷酸活化作用的CAR制备活性炭（AC）样品。评估了浸渍率，活化时间和活化温度对孔结构和表面官能团形成的影响。在550°C的氮气中由氮气和磷酸以1.5的浸渍比（CAR-AC-2.0）在氮气中在1.5摄氏度下热解1.5小时制得的AC具有最大的比表面积（786 m（2）/ g）和总孔体积（0.71 mL / g）。通过扫描电子显微镜，热重分析，元素分析和傅里叶变换红外光谱（FTIR）对AC样品的表面形貌和化学性质进行了表征，并测试了它们对亚甲基蓝（MB）和碘的吸附能力。 CAR-AC-2.0表面几乎没有官能团，CAR-AC-2.0对碘和MB的吸附量分别达到729和121 mg / g。 CAR-AC-2.0是从溶液和废水中去除有机物的理想吸附剂。 CAR-AC-2.0对含糖废水中化学需氧量（COD）的吸附效率为291.6 mg / g，当剂量为15 g / L时的去除效率为80.9％。该研究提供了一种高效，低成本从发酵废水中去除COD的新策略。

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  • 来源
    《Environmental Engineering Science》 |2019年第6期|656-666|共11页
  • 作者

    Liu Yao; Yao Xiaolong; Wang Zhibo; Li Hailong; Shen Xianbao; Yao Zhiliang; Qian Feng;

  • 作者单位

    Beijing Technol & Business Univ, Dept Environm Sci & Engn, Beijing 100048, Peoples R China|Beijing Technol & Business Univ, Key Lab Cleaner Prod & Integrated Resource Utiliz, Beijing, Peoples R China;

    Beijing Technol & Business Univ, Dept Environm Sci & Engn, Beijing 100048, Peoples R China|Beijing Technol & Business Univ, Key Lab Cleaner Prod & Integrated Resource Utiliz, Beijing, Peoples R China;

    Beijing Technol & Business Univ, Dept Environm Sci & Engn, Beijing 100048, Peoples R China|Beijing Technol & Business Univ, Key Lab Cleaner Prod & Integrated Resource Utiliz, Beijing, Peoples R China;

    Cent S Univ, Sch Energy Sci & Engn, Changsha, Hunan, Peoples R China;

    Beijing Technol & Business Univ, Dept Environm Sci & Engn, Beijing 100048, Peoples R China|Beijing Technol & Business Univ, Key Lab Cleaner Prod & Integrated Resource Utiliz, Beijing, Peoples R China;

    Beijing Technol & Business Univ, Dept Environm Sci & Engn, Beijing 100048, Peoples R China|Beijing Technol & Business Univ, Key Lab Cleaner Prod & Integrated Resource Utiliz, Beijing, Peoples R China;

    Beijing Technol & Business Univ, Dept Environm Sci & Engn, Beijing 100048, Peoples R China|Beijing Technol & Business Univ, Key Lab Cleaner Prod & Integrated Resource Utiliz, Beijing, Peoples R China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    activated carbon; activation; chemical oxygen demand; citric acid residue; phosphoric acid;

    机译：活性炭;活化;化学需氧量;柠檬酸残余物;磷酸;

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