An Investigation and Comparison of Removing
Heavy Metals (Lead and Chromium) from Aqueous
Solutions Using Magnesium Oxide Nanoparticles

Abdollah Dargahi; Hafez Gholestanifar; Parviz Darvishi; Amir Karami; Syed Hadi Hasan; Ali Poormohammadi; Alireza Behzadnia

doi:10.15244/pjoes/60281

2/2016 vol. 25

ORIGINAL RESEARCH

An Investigation and Comparison of Removing Heavy Metals (Lead and Chromium) from Aqueous Solutions Using Magnesium Oxide Nanoparticles

Abdollah Dargahi^1,4, Hafez Golestanifar², Parviz Darvishi³, Amir Karami⁴, Syed Hadi Hasan⁵, Ali Poormohammadi^6,4, Alireza Behzadnia³

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¹Department of Environmental Health Engineering, Faculty of Health, Kermanshah University of Medical Sciences,
Kermanshah, Iran
²Department of Environmental Health Engineering, Exploration Directorate, NIOC, Tehran, Iran
³Department of Chemical Engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran
⁴Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran
⁵Water Pollution Research Laboratory, Department of Chemistry, Indian Institute of Technology
(Banaras Hindu University), Varanasi 221005, UP, India
⁶Social Development and Health Promotion Research Center, Kermanshah University of Medical Sciences,
Kermanshah, Iran

Submission date: 2014-09-24

Final revision date: 2015-10-17

Acceptance date: 2015-10-19

Publication date: 2016-03-17

Pol. J. Environ. Stud. 2016;25(2):557-562

DOI: https://doi.org/10.15244/pjoes/60281

KEYWORDS

magnesium oxide nanoparticles

TOPICS

Quality control

Water treatment

Reuse of reclaimed waters

Atmospherical pollution control

Pollution prevention

Climate changes

Utilization and management

Biological and chemical treatment

Reuse of wastewaters

ABSTRACT

This study aims to investigate the effi ciency of magnesium oxide nanoparticles (MON) in vitro for the removal of lead (II) and chromium (VI) from aqueous environments. The effects of various parameters such as contact time (15 to 280 min), pH (3, 5, 7 and 9), the initial concentration of lead/chromium (10, 20, 30.40 and 50 mg/L), absorbent dose (0.3, 0.5 and 0.8 g/L), and shaking speed (150 to 350 rpm) was investigated. The parameters were optimized by varying one parameter at a time and keeping other parameters constant. The maximum removal effi ciency of MON for lead (II) and chromium (VI) was achieved at contact time 280 min, pH 9, initial concentration of lead/chromium 10 mg/L, adsorbent dose 0.8 g/L, and shaking speed 250 rpm. The results also indicated that MON convert the Pb²⁺ to Pb⁰ and Cr⁶⁺ to Cr³⁺ during the removal process. The adsorption of lead (II) and chromium (VI) follows the Langmuir isotherms, therefore the adsorption was of a physical nature.

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