Open AccessRemoval of heavy metals from industrial wastewater by use of Cyclopentane - Clathrate Hydrate formation technology
Author(s) -
Shurooq T. AL-Hemeri,
Riyadh S. Almukhtar,
Marwa N. Hussine
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/737/1/012178
Subject(s) - clathrate hydrate , chemistry , cyclopentane , hydrate , wastewater , metal ions in aqueous solution , aqueous solution , zinc , industrial wastewater treatment , metal , inorganic chemistry , environmental engineering , organic chemistry , environmental science
In this research, the experimental system was built up for treatment of wastewater containing substantial metal particles by the hydrate-based technique. The whole experimental system comprises of five fundamental methodologies: hydrate formation, hydrate separation, hydrate dissociation, centrifugal separation, and characterization. Many technologies were being utilized to remove substantial metal particles; however these frameworks had special prerequisites for raw wastewater, such as pH, temperature, contamination type and amount. Consequently, there is a evolving requirement for elective techniques for treating wastewater containing heavy metals, for which hydrate-based separation seems promising. The removal of the heavy metal ion Cu 2+ , Ni 2+ , Zn 2+ and Cr 3+ by the hydrate-based method gives an enhancement to the ordinary wastewater treatment innovation. Aqueous solutions of the wastewater were synthesized by adding a certain amount of each salt such as copper sulfate anhydrous (CuSO 4 ·5H 2 O), nickel sulfate (NiSO 4 ), Zinc chloride (Zncl 2 ) and tri-chloro chromium (CrCl 3 ) to the distilled water. Cyclopentane was employed to form hydrate in this research on account of its immiscibility with water, non-toxicity, and thermodynamic stability. Clathrate for ternary systems (cyclopentane, water and ionic salt) were formed at different types and concentrations of salts in the liquid state at temperature below 7 °C and normal atmospheric pressure. An effect of the cyclopentane-heavy metal solution volume ratio and concentration of the heavy metal on removal efficiency of heavy metal ions, the enrichment factor and a yield of the dissociated water are discussed. The results show that the technology has higher removal efficiency upon changing the volume ratio from 1/2 to 1/6, and achieve wastewater minimization, but lower enrichment factor and yield of dissociated water. This work gives thoughts into low-energy, serious treatment of wastewater.