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首页> 外文期刊>Chemosphere >Adsorption and reduction of Cr(Ⅵ) from aqueous solution using cost-effective caffeic acid functionalized corn starch
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Adsorption and reduction of Cr(Ⅵ) from aqueous solution using cost-effective caffeic acid functionalized corn starch

机译：使用经济高效的咖啡酸官能化玉米淀粉从水溶液中吸附和减少Cr（Ⅵ）

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摘要

Herein, a potential bio-adsorbent (DACS-CA) was formed via immobilizing caffeic acid (CA) on dialdehyde corn starch (DACS) for Cr(VI) removal. The characterization techniques such as IR, Raman, XPS and C-13 NMR were performed to analyze surface elements and functional groups on the as-prepared sorbents. Batch experiments revealed that the maximum Cr(VI) removal amount (96.45 mg/g) took place at a pH value of 3.0, adsorption temperatures of 333 K and solid-liquid ratio of 0.2. The isotherms studies found that the Cr(VI) removal of DACS-CA was monolayer adsorption, while the kinetics analysis revealed that chemisorption was the main power for removal process. Characterization analysis found that about Cr(VI) (53.02%) and Cr(III) (46.98%) species co-existed onto the surface of DACS-CA, which implied that a redox reaction may be occurred between Cr(VI) and the bio-adsorbent. Namely, Cr(VI) was first loaded on DACS-CA via electrostatic interaction, subsequently Cr(VI) was partially transformed into Cr(III) by reductive functional groups, meanwhile the resulting Cr(III) was immobilized by the carboxyl groups of DACS-CA. Thus, this bio-adsorbent could serve as an efficient sorbent for the removal of Cr(VI) from wastewater in environmental pollution cleanup. (C) 2021 Elsevier Ltd. All rights reserved.
机译：在此，通过固定咖啡酸（CA）在烷基氧化物（DAC）上以CR（VI）去除的二烷基酸（DAC）形成电位生物吸附剂（DACS-CA）。进行诸如IR，拉曼，XPS和C-13 NMR的表征技术，以分析在制备的吸附剂上的表面元素和官能团。批量实验表明，最大Cr（VI）除去量（96.45mg / g）在pH值为3.0的pH值，吸附温度为333 k和固液比为0.2。等温学研究发现，DACS-CA的CR（VI）除去单层吸附，而动力学分析表明，化学吸附是用于去除过程的主要功率。表征分析发现，关于Cr（53.02％）和Cr（46.98％）（46.98％）（46.98％）（46.98％）的物种，其暗示了氧化还原反应可以在Cr（VI）和氧化物中发生生物吸附剂。即，首先通过静电相互作用首先将Cr（VI）加载到DACS-CA上，随后通过还原官能团将Cr（VI）部分转化为Cr（III），同时由所得Cr（III）通过DAC的羧基固定。 -CA。因此，这种生物吸附剂可以作为高效吸附剂，用于从环境污染清理中从废水中除去Cr（VI）。 （c）2021 elestvier有限公司保留所有权利。

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  • 来源
    《Chemosphere》 |2021年第2期|130539.1-130539.9|共9页
  • 作者

    Liu Fenglei; Hua Shan; Wang Chao; Qiu Muqing; Jin Limin; Hu Baowei;

  • 作者单位

    Shaoxing Univ Sch Life Sci Huancheng West Rd 508 Shaoxing 312000 Peoples R China;

    Shaoxing Univ Sch Life Sci Huancheng West Rd 508 Shaoxing 312000 Peoples R China;

    Tsinghua Univ Sch Environm Beijing 100084 Peoples R China;

    Shaoxing Univ Sch Life Sci Huancheng West Rd 508 Shaoxing 312000 Peoples R China;

    Shaoxing Univ Sch Life Sci Huancheng West Rd 508 Shaoxing 312000 Peoples R China;

    Shaoxing Univ Sch Life Sci Huancheng West Rd 508 Shaoxing 312000 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《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Caffeic acid; Corn starch; Cr ions; Adsorption; Reduction;

    机译：咖啡酸;玉米淀粉;Cr离子;吸附;减少;

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