Metal organic frameworks MIL-100(Fe) as an efficient adsorptive material for phosphate management

Monika Nehra; Neeraj Dilbaghi; Nitin Kumar Singhal; Ashraf Aly Hassan; Ki-Hyun Kim; Sandeep Kumar

doi:10.1016/j.envres.2018.11.013

Metal organic frameworks MIL-100(Fe) as an efficient adsorptive material for phosphate management

Environ Res. 2019 Feb:169:229-236. doi: 10.1016/j.envres.2018.11.013. Epub 2018 Nov 14.

Authors

Monika Nehra¹, Neeraj Dilbaghi², Nitin Kumar Singhal³, Ashraf Aly Hassan⁴, Ki-Hyun Kim⁵, Sandeep Kumar⁶

Affiliations

¹ Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India; Department of Electronics and Communication Engineering, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India.
² Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India.
³ National Agri Food Biotechnology Institute, Mohali 140306, India.
⁴ Department of Civil Engineering, University of Nebraska Lincoln, P.O. Box 886105, Lincoln, NE 68588-6105, United States.
⁵ Department of Civil & Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, Republic of Korea. Electronic address: kkim61@hanyang.ac.kr.
⁶ Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India; Department of Civil Engineering, University of Nebraska Lincoln, P.O. Box 886105, Lincoln, NE 68588-6105, United States. Electronic address: ksandeep36@yahoo.com.

PMID: 30476746
DOI: 10.1016/j.envres.2018.11.013

Abstract

The excessive discharge of phosphate in water bodies is one of the primary factors causing eutrophication. Therefore, its removal is of significant research interest. The present study deals with the development and performance of highly effective phosphate-adsorbent. Here, we have synthesized MIL-100(Fe) metal-organic frameworks as a facile strategy to effectively remove phosphate from eutropic water samples. The adsorbent was characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), and wavelength dispersive X-ray fluorescence (WDXRF). The phosphate adsorption performance of MIL-100(Fe) was evaluated with the help of different batch experiments relating to the effect of adsorbent/adsorbate concentrations and the solution pH. The MOF offered a maximum adsorption capacity of 93.6 mg g^-1 for phosphate from aqueous solutions with Langmuir isotherm model (R² = 0.99). MIL-100(Fe) offered an absolute phosphate adsorption performance with a partition co-efficient of 15.98 mg g^-1 µM^-1 at pH 4 and room temperature conditions. Final experiments with real water samples were also performed to examine the effectiveness of MIL-100(Fe) for phosphate adsorption even in the presence of other ions. These findings support the potential utility of MIL-100(Fe) as nanoadsorbent in phosphate removal for water management.

Keywords: Adsorption; Environment; Metal organic framework; Phosphate; Removal Efficiency.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Hydrogen-Ion Concentration
Metal-Organic Frameworks*
Phosphates* / chemistry
Spectroscopy, Fourier Transform Infrared
Water Pollutants, Chemical* / chemistry

Substances

Metal-Organic Frameworks
Phosphates
Water Pollutants, Chemical