Preliminary study on the upcycle of non-structural construction and demolition waste for waste cleaning

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-04-15 DOI:10.3989/mc.2020.13819

P. Chen, X. Chen, Y. Wang, P. Wang

引用次数: 3

Abstract

This study proposes a method to convert non-structural calcium-rich construction and demolition waste fines into adsorbents of heavy metal ions by mixing waste fines with diammonium hydrogen phosphate solution to produce hydroxyapatite, which has high surface areas and excellent ion-exchange capacity with heavy metal ions. As a result, environmental polluting waste is converted into environmentally cleaning material. Waste putty powders was chosen as the representative waste to investigate the detailed formation process of hydroxyapatite and the key reaction parameters of the reaction. Results showed that hydroxyapatite can be produced on waste putty particles. Higher ageing temperatures or longer ageing duration are beneficial to the yield and crystallinity of the produced hydroxyapatite. Adsorption testing confirmed that Ni2+ can replace Ca2+ in the hydroxyapatite lattice, leading to the formation of a new crystal, arupite (Ni3(PO4)2•8H2O), and contributing to a modest adsorption capacity for Ni2+ (15 mg/g) for the hydroxyapatite-containing waste putty.

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非结构建筑和拆除垃圾的升级回收用于垃圾清洗的初步研究

本研究提出了一种将非结构富钙建筑和脱模废细粒与磷酸氢二铵溶液混合生产羟基磷灰石的方法，将废细粒转化为重金属离子的吸附剂，该羟基磷灰石具有高表面积和优异的与重金属离子的离子交换能力。结果，污染环境的废物被转化为环境清洁材料。以废腻子粉为代表，研究了羟基磷灰石的详细形成过程和反应的关键反应参数。结果表明，在废腻子颗粒上可以制备羟基磷灰石。较高的老化温度或较长的老化持续时间有利于所制备的羟基磷灰石的产率和结晶度。吸附测试证实，Ni2+可以取代羟基磷灰石晶格中的Ca2+，从而形成一种新的晶体，arupite（Ni3（PO4）2•8H2O），并有助于对含羟基磷灰石的废腻子的Ni2+具有适度的吸附能力（15mg/g）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.