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首页> 外文期刊>Journal of Hazardous Materials >Hydrothermal liquefaction accelerates the toxicity and solubility of arsenic in biowaste
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Hydrothermal liquefaction accelerates the toxicity and solubility of arsenic in biowaste

机译：水热液化加速了砷在Biowaste中的毒性和溶解性

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摘要

Arsenic (As) is one of notorious metalloids due to its high toxicity to human beings and ecological system. Understanding its fate and speciation transformation mechanism during hydrothermal liquefaction (HTL) of microalgae is of crucial importance for the application of its HTL products. 80.0-96.7% of As in raw microalgae was migrated into the liquid phase (aqueous phase and biocrude oil) with the increase of reaction severity from 0.108 to 0.517. HPLC-ICPMS reveals that 67% of the As in microalgae accounted for As(V) with a concentration of 68.4 mg/kg. The other fractions in microalgae were primarily As(III) with a concentration of 36.3 mg/kg. Model compounds experiments illustrate that over 30% of the As(V) in feedstocks was unexpectedly converted into more soluble and toxic As (III). Hydrochar containing O-containing groups (e.g., aliphatic C-OH) was probably contribute to the reduction transformation of As(V) to higher toxic As(III). Meantime, the aqueous phase facilitated the reduction reaction via providing a reducing environment and serving as hydrogen donator. This study firstly revealed the speciation transformation of As(V) to As(III) during HTL of wastewater cultivated microalgae.
机译：砷（AS）是由于其对人类和生态系统的高毒性而臭名昭着的金属剂之一。了解其在微藻水热液化（HTL）期间的命运和形态转化机制对于应用其HTL产品至关重要。将80.0-96.7％的原料微藻迁移到液相（水相和生物油）中，随着0.108至0.517的反应严重程度的增加。 HPLC-ICPMS显示，Microalgae中的67％占（v），浓度为68.4mg / kg。微藻中的其他级分主要是​​（III），浓度为36.3mg / kg。模型化合物实验说明，超过30％的原料中的AS（V）意外地被意外转化为更可溶和毒性的（III）。含有含O的液体（例如，脂族C-OH）可能导致AS（V）的还原转化为较高的毒性为（III）。同时，水相通过提供还原环境和用作氢排放剂，促进了还原反应。本研究首先揭示了在废水栽培微藻HTL中为（v）至（III）的形象转化。

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  • 来源
    《Journal of Hazardous Materials》 |2021年第15期|126341.1-126341.10|共10页
  • 作者

    Li Hugang; Cao Maojiong; Zhang Yuanhui; Liu Zhidan;

  • 作者单位

    China Agr Univ Coll Water Resources & Civil Engn Lab Environm Enhancing Energy E2E Beijing 100083 Peoples R China|Nanchang Univ Key Lab Poyang Lake Environm & Resource Utilizat Minist Educ Nanchang 330031 Jiangxi Peoples R China|Nanchang Univ Sch Resources Environm & Chem Engn Nanchang 330031 Jiangxi Peoples R China|Minist Agr Key Lab Agr Engn Struct & Environm Beijing 100083 Peoples R China;

    China Agr Univ Coll Water Resources & Civil Engn Lab Environm Enhancing Energy E2E Beijing 100083 Peoples R China|Minist Agr Key Lab Agr Engn Struct & Environm Beijing 100083 Peoples R China;

    Univ Illinois Dept Agr & Biol Engn Urbana IL 61801 USA;

    China Agr Univ Coll Water Resources & Civil Engn Lab Environm Enhancing Energy E2E Beijing 100083 Peoples R China|Minist Agr Key Lab Agr Engn Struct & Environm Beijing 100083 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);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Arsenic; Hydrothermal liquefaction; Microalgae; Reduction reaction; Toxicity;

    机译：砷;水热液化;微藻;还原反应;毒性;

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