Phosphate Adsorption on Cerium/Terephthalic Acid Metal–Organic Frameworks (Ce‐MOF) Driven by Effective Electrostatic Attraction and Ligand Exchange in a Wide pH Range

Author:

Zhou Zhenyu1,Li Dexuan1,Huang Weiming1,Wang Rongyue1,Zhong Jiapeng1,Zhang Yangyang1,Meng Jiazhou1,Li Chuanhao1ORCID

Affiliation:

1. School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen University Guangzhou 510006 P. R. China

Abstract

AbstractEutrophication has posed a threat to aquatic ecosystems, so it's urgent to remove excessive phosphate from water. In this study, we developed an adsorbent material, cerium/terephthalic‐acid metal‐organic‐frameworks (Ce‐MOF), to remove phosphate from different water systems. The optimal Ce‐MOF presented a maximum phosphate adsorption capacity of 377.2 mg/g, approximately 3.7 times higher than that of the commercial phosphate adsorbent (Phoslock: 101.6 mg/g). Experimental and computational analysis suggested that pH dominated the adsorption process. The main forces driving the adsorption process changed from the synergistic effect of electrostatic attraction and ligand exchange at lower pH to only ligand exchange at the increased pH values. Hence, the Ce‐MOF is applicable for phosphate adsorption in a wide pH range. Impressively, the adsorbent remained an excellent phosphate adsorption performance in the real water containing various interfering ions and organic matters, indicating the potential of Ce‐MOF for the practical use to solve the water eutrophication issue.

Funder

National Natural Science Foundation of China

Science and Technology Planning Project of Guangdong Province

Fundamental Research Funds for the Central Universities

Publisher

Wiley

Subject

General Chemistry,Biochemistry,Organic Chemistry

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