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首页> 外文期刊>Journal of Hazardous Materials >Clean production of porous-All(OH)_ 3 from fly ash
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Clean production of porous-All(OH)_ 3 from fly ash

机译：从粉煤灰清洁多孔 - 全（OH）_ 3的生产

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摘要

Fly ash is one of the largest solid waste and causes serious environment problems. Extraction of Al(OH)(3) from fly ash is beneficial to environment and economy. We developed a clean electrolysis method to generate hydroxyl groups in situ to extract Al(OH)(3) from fly ash leachate without adding chemicals or using expensive membranes, avoiding the introduction of new impurities, secondary pollutants generation, and membrane limitations. Batch experiments yielded porous electrolytic products with BET surface areas from 11.7610 to 25.5267 m(2)/g, pore volumes from 0.1935 to 0.1643 cm(3)/g and pore sizes from 65.7960 to 25.7434 nm. The composition of the electrolytic products was 86.43 wt% Al(OH)(3), 9.00 wt% SO3, 1.67 wt% Fe(OH)(3), and 0.29 wt% Ca(OH)(2). The current efficiency was 90.51 % under optimized conditions of c (Al3+) = 0.1 M, t = 2 h, and J = 750 A/m(2). Mean particle size was from 24.1-98.1 mu m. Impurities mainly affected the composition of the electrolytic products. The OH- generated by H2O reduction reacted with Al3+, Fe3+, and Ca2+ to generate a hydroxide. Fe3+ preceded Ca2+ into the hydroxide. H-2 released continuously from H2O reduction, resulting in a porous hydroxide. The wastewater was reused as a leaching reagent to promote zero-pollution discharge.
机译：飞灰是最大的固体浪费之一，并导致严重的环境问题。来自粉煤灰的Al（OH）（3）的提取有利于环境和经济。我们开发了一种清洁的电解方法，以原位产生羟基，以从粉煤灰渗滤液中提取Al（OH）（3），而无需添加化学物质或使用昂贵的膜，避免引入新的杂质，二级污染物产生和膜限制。批量实验产生了从11.7610至25.5267m（2）/ g的BET表面积的多孔电解产物，从0.1935到0.1643cm（3）/ g，孔径为65.7960至25.7434nm。电解产物的组成为86.43wt％Al（OH）（3），9.00wt％SO 3,1.67wt％Fe（OH）（3）和0.29wt％Ca（OH）（2）。在C（Al3 +）= 0.1M，T = 2小时的优化条件下，当前效率为90.51％，X = 750A / m（2）。平均粒度为24.1-98.1μm。杂质主要影响了电解产物的组成。通过H 2 O还原产生的OH-产生，与Al 3 +，Fe 3 +和Ca2 +反应以产生氢氧化物。 Fe3 +前面的Ca2 +进入氢氧化物。 H-2连续从H 2 O还原释放，导致多孔氢氧化物。废水作为浸出试剂重复使用，以促进零污染排放。

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  • 来源
    《Journal of Hazardous Materials》 |2020年第jul5期|122371.1-122371.11|共11页
  • 作者

    Shi Yuan; Jiang Kai-xi; Zhang Ting-an; Guo Jun-hua; Zhao Ai-chun;

  • 作者单位

    Northeastern Univ Sch Met Special Met & Proc Engn Inst Key Lab Ecol Met Multimet Intergrown Ores Minist Shenyang 110819 Peoples R China;

    Northeastern Univ Sch Met Special Met & Proc Engn Inst Key Lab Ecol Met Multimet Intergrown Ores Minist Shenyang 110819 Peoples R China|Fuzhou Univ Coll Zijin Min Fuzhou 350000 Peoples R China|Univ Sci & Technol Beijing Sch Met & Ecol Engn Beijing 100000 Peoples R China;

    Northeastern Univ Sch Met Special Met & Proc Engn Inst Key Lab Ecol Met Multimet Intergrown Ores Minist Shenyang 110819 Peoples R China;

    Northeastern Univ Sch Met Special Met & Proc Engn Inst Key Lab Ecol Met Multimet Intergrown Ores Minist Shenyang 110819 Peoples R China;

    Taiyuan Univ Sci & Technol Sch Mat Sci & Engn Taiyuan 030024 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

    Porous-alumina; Leachate; One-chamber electrolysis; Fly ash;

    机译：多孔氧化铝;渗滤液;单室电解;飞灰;

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