Synthesis of calcium and iron oxide/hydroxide bifunctional materials for treating phosphate and hardness in water

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-07-02 DOI:10.1007/s43153-024-00482-8

Le Ba Tran, Quynh Anh Nguyen Thi, Nhat Huy Nguyen, Tri Thich Le, Phuoc Toan Phan, Surapol Padungthon, Trung Thanh Nguyen

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Abstract

This article focuses on synthesizing dual-functional adsorption-ion exchange material (Fe-Ca/225H) by precipitation method on 225H cation exchange resin for the treatment of phosphate and hardness in water. Materials were analyzed through methods such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction studies (XRD), and scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). For the phosphate adsorption, suitable conditions were experimentally found to include reaction time (48 h), pH (6.5), adsorbent dosage (10 g/L), and HCO₃⁻ ions as the most impact ion on the phosphate adsorption. When calcium and magnesium were present in a solution containing phosphate, the phosphate adsorption capacity increased by 1.24 times. This was due to the combination of calcium and magnesium with phosphate on the surface of the material, which improves the adsorption efficiency. Besides, when compared with materials containing only iron (Fe/225H), the adsorption capacity of Ca-Fe/225H materials is still higher in both synthetic wastewater and domestic wastewater. The durability of the material after 10 regenerations was still over 80% effective. The material is effective in simultaneously treating both phosphate and hardness in the solution, with a much higher hardness treatment efficiency than amphoteric resin on the market (MB6SR).

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合成用于处理水中磷酸盐和硬度的钙铁氧化物/氢氧化物双功能材料

本文主要通过沉淀法在 225H 阳离子交换树脂上合成双功能吸附-离子交换材料（Fe-Ca/225H），用于处理水中的磷酸盐和硬度。通过傅立叶变换红外光谱（FT-IR）、X 射线衍射研究（XRD）、扫描电子显微镜（SEM）和能量色散 X 射线光谱（EDX）等方法对材料进行了分析。实验发现，适合磷酸盐吸附的条件包括反应时间（48 小时）、pH 值（6.5）、吸附剂用量（10 克/升）以及对磷酸盐吸附影响最大的离子 HCO3-。当含有磷酸盐的溶液中含有钙和镁时，磷酸盐的吸附容量增加了 1.24 倍。这是由于钙和镁与材料表面的磷酸盐结合，提高了吸附效率。此外，与只含铁（Fe/225H）的材料相比，钙-铁/225H 材料在合成废水和生活废水中的吸附容量仍然更高。经过 10 次再生后，材料的耐久性仍然超过 80%。该材料能有效地同时处理溶液中的磷酸盐和硬度，其硬度处理效率远远高于市场上的两性树脂（MB6SR）。

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.