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使用聚合物功能化活性炭去除重金属离子：环境经济与化学教育方面

Removal of Heavy Metal Ion Using Polymer-Functionalized Activated Carbon: Aspects of Environmental Economic and Chemistry Education.

作者信息

Ha Hoang Thu, Huong Nguyen Thi, Dan Le Linh, Tung Nguyen Duy, Trung Vinh Bao, Minh Tran Dinh

机构信息

Faculty of Pedagogy, VNU University of Education, Vietnam National University, Cau Giay, Hanoi 100000, Vietnam.

Faculty of Educational Management, VNU University of Education, Vietnam National University, Cau Giay, Hanoi 100000, Vietnam.

出版信息

J Anal Methods Chem. 2020 Sep 7;2020:8887488. doi: 10.1155/2020/8887488. eCollection 2020.

DOI:10.1155/2020/8887488
PMID:32963883
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7492870/
Abstract

Numerous countries have shown signs of environmental pollution to prioritize economic growth and benefits, leading to seriously contaminated waters. This work indicated the method to synthesize a green material, which could remove contaminants to protect the natural environment. The porosity and functionality effects of amine-functionalized activated carbon (AFAC) enhanced the removal of toxic heavy metals (THMs) in aqueous solution. The raw activated carbon (RAC) was thermally modified with ultrahigh pure nitrogen (UHPN) at 500°C and 1000°C and then amine-functionalized with coupling agent of aminopropyltriethoxysilane (APS). They were denoted as AFAC-5 and AFAC-10, respectively. The data showed an enhanced metal adsorption capacity of the AFACs, because the modification produced more desired porosity and increased amine functional groups. AFAC-10, modified at a higher temperature, showed much higher THM adsorption capacity than AFAC-5, modified at a lower temperature, and RAC. The adsorption capacity decreased in the following order: Ni > Cd > Zn, which was in good agreement with the increasing electronegativity and ionic potential and the decreasing atomic radius. The maximum THM adsorption capacity of AFAC-10 for Ni, Cd, and Zn was 242.5, 226.9, and 204.3 mg/g, respectively.

摘要

许多国家为了优先发展经济和获取利益而出现了环境污染的迹象，导致水体受到严重污染。这项工作展示了一种合成绿色材料的方法，该材料可以去除污染物以保护自然环境。胺功能化活性炭（AFAC）的孔隙率和功能效应增强了对水溶液中有毒重金属（THM）的去除。将原始活性炭（RAC）在500°C和1000°C下用超高纯氮气（UHPN）进行热改性，然后用氨丙基三乙氧基硅烷（APS）偶联剂进行胺功能化。它们分别被标记为AFAC - 5和AFAC - 10。数据显示AFACs的金属吸附能力增强，因为改性产生了更理想的孔隙率并增加了胺官能团。在较高温度下改性的AFAC - 10比在较低温度下改性的AFAC - 5和RAC表现出更高的THM吸附能力。吸附能力按以下顺序降低：Ni＞Cd＞Zn，这与电负性和离子势的增加以及原子半径的减小高度一致。AFAC - 10对Ni、Cd和Zn的最大THM吸附容量分别为242.5、226.9和204.3 mg/g。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7540/7492870/12bff4e5e952/JAMC2020-8887488.001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7540/7492870/df371864f105/JAMC2020-8887488.008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7540/7492870/191c87aefa89/JAMC2020-8887488.009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7540/7492870/03d5b35b9630/JAMC2020-8887488.012.jpg

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