Issue 9, 2024

A report on arsenic removal from water via adsorption of an arsenomolybdate complex on S–CuFe2O4 adsorbents

Abstract

Drinking ground water in many areas of Pakistan is contaminated by dissolved arsenic. The consumption of arsenic-contaminated water causes many carcinogenic diseases. Hence, this work aims to estimate and eliminate arsenic from ground water used for drinking purposes in the Layyah District (Punjab – PK). For the purpose, water samples were collected from selected areas of the aforementioned district, and average arsenic concentration was estimated to be 95 ppb. Thereafter, to remove dissolved arsenic contents (As3+ and As5+), sulphur-doped copper ferrite, i.e., S–CuFe2O4 adsorbent, was developed via a hydrothermal approach. To justify its effectiveness, structural morphology of the adsorbent was evaluated via XRD, FT-IR, Raman and AFM analysis, whereas its stability was investigated via TGA analysis. Its purity and chemical compositions were determined using SEM, EDX and XPS techniques. Magnetic properties of S–CuFe2O4 were examined via VSM. The results indicated that spinel cubic morphology of S–CuFe2O4 facilitates the effective adsorption of arsenic contents. For complete elimination, arsenic contents were first converted to an arsenomolybdate complex (AMC) and then removed from water via adsorption on S–CuFe2O4. The adsorption was found to be spontaneous with ΔG = −13.51 kJ mol−1, and adsorption kinetics for the AMC were well fitted by pseudo second order with a correlation coefficient (R2) of 0.99997. Adsorption isotherm and electrostatic interaction between S–CuFe2O4 and AMC were confirmed and revealed using Langmuir and Temkin models with R2 = 0.97021 and R2 = 0.87431, respectively. Results suggested that one gram of S–CuFe2O4 is enough to deliver 275 gal of arsenic free water.

Graphical abstract: A report on arsenic removal from water via adsorption of an arsenomolybdate complex on S–CuFe2O4 adsorbents

Supplementary files

Article information

Article type
Paper
Submitted
15 Apr 2024
Accepted
17 Jun 2024
First published
29 Jun 2024

Environ. Sci.: Water Res. Technol., 2024,10, 2030-2047

A report on arsenic removal from water via adsorption of an arsenomolybdate complex on S–CuFe2O4 adsorbents

E. Hussain, M. Sultana, M. Z. Abid, A. K. Buzdar, H. K. Thabet, S. M. El-Bahy, M. Jalil, A. Rauf, Z. M. El-Bahy and K. Rafiq, Environ. Sci.: Water Res. Technol., 2024, 10, 2030 DOI: 10.1039/D4EW00300D

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