Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method

IF 2.6 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Magnetochemistry Pub Date : 2024-01-09 DOI:10.3390/magnetochemistry10010005

Zhanmei Zhang, Zuqin Zou, Xiaoyu Ren, Yunxuan Huang, Yang Deng, Huaili Zheng

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Abstract

A diatomaceous earth (DE)-based adsorbent DE-Ce was prepared and optimized to remove phosphorus from wastewater. DE was modified through purification–cerium loading, improving its phosphorus adsorption capacity and recycling ability. The preparation conditions were optimized using the Box–Behnken design, and the response surface method was employed to analyze the effects of roasting temperature, cerium concentration, and HCl concentration on the preparation of DE-Ce. Scanning electron microscopy, X-ray fluorescence spectrometry, and X-ray photoelectron spectroscopy were used for characterization, with results indicating that HCl washing can effectively remove impurities. Cerium was mainly loaded onto DE in the form of Ce(OH)3, and pore size and capacity increased following cerium loading, with the formation of a macroporous structure. The obtained DE-Ce adsorbent removed 98.30% phosphorous, with the removal process following the secondary kinetic and Langmuir models. According to material characterization and model analysis results, the phosphorus removal mechanism primarily involves electrostatic adsorption, ligand exchange, and precipitation. Overall, the findings indicate that cerium modification can effectively improve the adsorption capacity of DE.

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利用响应面法制备和优化除磷吸附剂

制备并优化了一种基于硅藻土（DE）的吸附剂 DE-Ce，用于去除废水中的磷。通过对硅藻土进行纯化-铈负载改性，提高了其对磷的吸附能力和循环利用能力。采用 Box-Behnken 设计优化了制备条件，并采用响应面法分析了焙烧温度、铈浓度和盐酸浓度对 DE-Ce 制备的影响。采用扫描电子显微镜、X 射线荧光光谱和 X 射线光电子能谱进行表征，结果表明盐酸洗涤能有效去除杂质。铈主要以 Ce(OH)3 的形式负载到 DE 上，负载铈后孔径和容量增加，并形成大孔结构。得到的 DE-Ce 吸附剂对磷的去除率为 98.30%，去除过程遵循二级动力学和 Langmuir 模型。根据材料表征和模型分析结果，除磷机理主要包括静电吸附、配体交换和沉淀。总之，研究结果表明，铈改性可有效提高 DE 的吸附能力。

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来源期刊

Magnetochemistry Chemistry-Chemistry (miscellaneous)

CiteScore

3.90

自引率

11.10%

发文量

145

审稿时长

11 weeks

期刊介绍： Magnetochemistry (ISSN 2312-7481) is a unique international, scientific open access journal on molecular magnetism, the relationship between chemical structure and magnetism and magnetic materials. Magnetochemistry publishes research articles, short communications and reviews. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.