Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method
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 de...
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MDPI AG
2024-01-01
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| Series: | Magnetochemistry |
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| Online Access: | https://www.mdpi.com/2312-7481/10/1/5 |
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| author | Zhanmei Zhang Zuqin Zou Xiaoyu Ren Yunxuan Huang Yang Deng Huaili Zheng |
| author_facet | Zhanmei Zhang Zuqin Zou Xiaoyu Ren Yunxuan Huang Yang Deng Huaili Zheng |
| author_sort | Zhanmei Zhang |
| collection | DOAJ |
| description | 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)<sub>3</sub>, 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. |
| first_indexed | 2024-03-08T10:43:37Z |
| format | Article |
| id | doaj.art-b5e95c7f28b249c59531a56e301233c7 |
| institution | Directory Open Access Journal |
| issn | 2312-7481 |
| language | English |
| last_indexed | 2024-03-08T10:43:37Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Magnetochemistry |
| spelling | doaj.art-b5e95c7f28b249c59531a56e301233c72024-01-26T17:25:24ZengMDPI AGMagnetochemistry2312-74812024-01-01101510.3390/magnetochemistry10010005Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface MethodZhanmei Zhang0Zuqin Zou1Xiaoyu Ren2Yunxuan Huang3Yang Deng4Huaili Zheng5Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaKey Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaKey Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaKey Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaKey Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaKey Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, Chongqing University, Chongqing 400045, ChinaA 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)<sub>3</sub>, 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.https://www.mdpi.com/2312-7481/10/1/5cerium-modified diatomaceous earthadsorbentresponse surface method |
| spellingShingle | Zhanmei Zhang Zuqin Zou Xiaoyu Ren Yunxuan Huang Yang Deng Huaili Zheng Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method Magnetochemistry cerium-modified diatomaceous earth adsorbent response surface method |
| title | Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method |
| title_full | Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method |
| title_fullStr | Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method |
| title_full_unstemmed | Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method |
| title_short | Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method |
| title_sort | preparation and optimization of the adsorbent for phosphorus removal using the response surface method |
| topic | cerium-modified diatomaceous earth adsorbent response surface method |
| url | https://www.mdpi.com/2312-7481/10/1/5 |
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