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首页> 外文期刊>Journal of Hazardous Materials >Recycling of typical difficult-to-treat e-waste: Synthesize zeolites from waste cathode-ray-tube funnel glass
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Recycling of typical difficult-to-treat e-waste: Synthesize zeolites from waste cathode-ray-tube funnel glass

机译：回收典型的难以处理的电子垃圾：从废阴极射线管漏斗玻璃中合成沸石

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摘要

The disposal of waste cathode ray-tubes (CRTs) from old televisions and discarded computer monitors has become a major environmental concern worldwide. In this work, an open-loop recycling method was developed to synthesize zeolites using CRT funnel glass as the raw material. The effects of hydrothermal temperatures and pressure, n(SiO2/Al2O3) molar ratios and hydrothermal time on the resulting products were investigated. The results indicated that hydrothermal temperatures and pressure played critical roles in zeolite synthesis. Amorphous phases were detected at lower temperatures (80-100 degrees C) and pressure (0.47-1.01 bar) with n(SiO2/Al2O3)=2.0. At the temperature of 110 degrees C (pressure 1.43 bar), NaA formed with a mixture of NaP1 and Faujasite. With further increase in the temperature and pressure, the unstable NaA and Faujasite disappeared, and Hydroxysodalite developed. The influence of n(SiO2/Al2O3) ratios on resulting products revealed a single phase of NaA was formed at the ratio of 1.5 and a mixture of NaA and Faujasite at the ratio of 2.0. Prolonging hydrothermal time, however, could promote zeolite crystallization, and NaA gradually developed with an increase in the time from 2 to 6 h at n(SiO2/Al2O3)=1.5. By comparison, crystallization phases were observed only when the time was longer than 8 h at n(SiO2/Al2O3)=2.0. (C) 2016 Published by Elsevier B.V.
机译：处置旧电视中废弃的阴极射线管（CRT）和废弃的计算机显示器已成为全球关注的主要环境问题。在这项工作中，开发了一种开环回收方法，以CRT漏斗玻璃为原料合成沸石。研究了水热温度和压力，n（SiO2 / Al2O3）摩尔比和水热时间对所得产物的影响。结果表明，水热温度和压力在沸石合成中起关键作用。在较低的温度（80-100摄氏度）和压力（0.47-1.01巴）下检测到非晶相，n（SiO2 / Al2O3）= 2.0。在110摄氏度（压力1.43巴）的温度下，NaA与NaP1和八面沸石的混合物形成。随着温度和压力的进一步升高，不稳定的NaA和八面沸石消失了，羟基钠钙石得以发展。 n（SiO 2 / Al 2 O 3）比率对所得产物的影响表明，以1.5的比率形成NaA的单相，以2.0的比率形成NaA和八面沸石的混合物。然而，延长水热时间可以促进沸石的结晶，并且在n（SiO2 / Al2O3）= 1.5的情况下，NaA随着2至6 h时间的增加而逐渐形成。相比之下，仅在n（SiO2 / Al2O3）= 2.0的时间长于8小时时才观察到结晶相。 （C）2016由Elsevier B.V.发布

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  • 来源
    《Journal of Hazardous Materials》 |2017年第ptab期|673-680|共8页
  • 作者

    Yao Zhitong; Wu Daidai; Liu Jie; Wu Weihong; Zhao Hongting; Tang Junhong;

  • 作者单位

    Hangzhou Dianzi Univ, Coll Mat Sci & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China;

    Hangzhou Dianzi Univ, Coll Mat Sci & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China;

    Hangzhou Dianzi Univ, Coll Mat Sci & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China;

    Hangzhou Dianzi Univ, Coll Mat Sci & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China;

    Hangzhou Dianzi Univ, Coll Mat Sci & Environm Engn, Hangzhou 310018, Zhejiang, 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

    E-waste; Cathode ray-tube; Leaded glass; Open-loop recycling; Zeolite synthesis;

    机译：电子废物;阴极射线管;铅玻璃;开环回收;沸石合成;

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