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Cao Y, Zhang P, Chen S, Huang Y, Li J, Du H, Zhang W, Chen X, Yu D. ZnO/PUF composites with a large capacity for phosphate adsorption: adsorption behavior and mechanism studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34235-4. [PMID: 39066944 DOI: 10.1007/s11356-024-34235-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Accepted: 06/30/2024] [Indexed: 07/30/2024]
Abstract
Phosphate is present in all kinds of industrial wastewater; how to remove it to meet the strict total phosphorus discharge standards is a challenge. This study used a one-step foaming technique to fill polyurethane foam (PUF) with ZnO, taking advantage of PUF's excellent features like its porous network, lightweight, hydrophilicity, and abundance of binding sites to create ZnO/PUF composites with high adsorption capacity and exceptional separation properties. The adsorption isotherms, kinetics, starting pH, and matrix impacts of ZnO/PUF composites on phosphate were examined in batch studies. The results showed that the composites had good adsorption performance for phosphate with a saturated adsorption capacity of 460.25 mg/g. The quasi-secondary kinetic and Langmuir models could better describe the adsorption process, which belonged to the chemical adsorption of monomolecular layers. The composites' ability to treat phosphates in complicated waters was shown by their ability to retain a high adsorption capacity in the pH range of 3-6. In column experiments, the composite also maintains a good affinity for phosphate during dynamic adsorption. Multiple characterizations indicate that the adsorption mechanism is a combined effect of ligand exchange and electrostatic interactions. Therefore, this study provides valuable insights for practical phosphorus-containing wastewater treatment.
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Affiliation(s)
- Yang Cao
- College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan, P.R. China
| | - Peicong Zhang
- College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan, P.R. China.
- State Key Laboratory of Geo-Hazard Prevention and Earth Environment Protection, Chengdu, 610059, Sichuan, P.R. China.
| | - Suying Chen
- College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan, P.R. China
| | - Yi Huang
- State Key Laboratory of Geo-Hazard Prevention and Earth Environment Protection, Chengdu, 610059, Sichuan, P.R. China
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, P.R. China
| | - Junfeng Li
- College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan, P.R. China
| | - Haiying Du
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, Sichuan, P.R. China
| | - Wentao Zhang
- College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan, P.R. China
| | - Xianfei Chen
- College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, Sichuan, P.R. China
| | - Daming Yu
- Panzhihua Pangang Group Ming Company, Panzhihua, 617000, Sichuan, P.R. China
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Ni JY, He B, Huang H, Ning L, Liu QP, Wang KK, Wu HK, Shen HM, She YB. Cycloalkanes oxidation with O2 in high-efficiency and high-selectivity catalyzed by 3D MOFs with limiting domain and Zn(AcO)2 through synergistic mode. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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Ruan W, Wu H, Qi Y, Yang H. Removal of Hg 2+ in wastewater by grafting nitrogen/sulfur-containing molecule onto Uio-66-NH 2: from synthesis to adsorption studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:15464-15479. [PMID: 36169833 DOI: 10.1007/s11356-022-23255-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
The remediation of heavy metal deserves to be on the agenda, with the adsorbent design bearing the brunt of it. In this study, the molecule (4, 6-diamino-2-mercaptopyrimidine, DMP) containing thiol (-SH) and amino (-NH2) functional groups was grafted onto Uio-66-NH2, and a composite metal-organic framework nanomaterial (Zr(NH2)-DMP) was synthesized via a facile post-modification scheme. The morphological characteristics and structural features of the modified adsorbent were characterized by XRD, FT-IR, FE-SEM, EDS, BET, and XPS. The characterization results verified that the post-modification scheme was successfully achieved. The adsorption experiments were carried out to investigate the removal performance of the Zr(NH2)-DMP towards Hg2+ under different influencing parameters. The maximum adsorption capacity of 389.4 mg/g was obtained, and the adsorption equilibrium was achieved within 30 min at pH 6 at room temperature. Adsorption thermodynamic study indicated that the adsorption process was exothermic and spontaneous. The Zr(NH2)-DMP exhibited excellent selectivity for Hg2+, and also has the potential to remove Cu2+, Fe2+, and Zn2+ ions. The introduction of Cl- inhibited the removal of Hg2+ due to the formation of mercuric chlorides (removal efficiency reduced from 97.8 to 95.6%). The removal efficiency of up to 86.7% was obtained after four cycles. The Langmuir isotherm and Pseudo-second kinetic were more suitable for fitting the adsorption process of Hg2+ by Zr(NH2)-DMP. The main removal mechanism could be attributed to the chelation between Hg2+ (soft acid) and nitrogen/sulfur (soft base) elements. These findings convinced that the successful synthesis of Zr(NH2)-DMP provides an option for Hg2+ removal from wastewater.
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Affiliation(s)
- Wei Ruan
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, People's Republic of China
| | - Hao Wu
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, People's Republic of China.
| | - Yuan Qi
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, People's Republic of China
| | - Hongmin Yang
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, People's Republic of China
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