Abstract
Mercury as a hazardous material caused health problem in humans.In this study,mercury vapor removed from air by nickel-coated on multi-walled carbon nanotubes(Ni-MWCNTs)as a novel sorbent.Amalgamation of mercury with Ni-MWCNTs was achieved by solid-gas phase removal method(SGPR).In bench scale set up, the mercury vapor generated and moved to sorbent at optimized flow rate.After thermal desorption of Ni-MWCNTs at 200oC, the mercury vapor flowed to quartz glass cell with argon gas and determined by cold vapor atomic absorption spectrometer technique(CV-AAS).In optimized conditions,25 mg of Ni-MWCNTs and MWCNTs with different size from 30-100nm was used.The adsorption capacity of sorbents was obtained 194 mg g-1 and 64 mg g-1,respectively.The efficient recovery was obtained at optimized conditions such as, temperature of 25-40 and flow rate of 200 mL min-1.So, Ni-MWCNTs had good potential for removal of mercury vapor from the air and can be used as a low cost and efficient sorbent in industrial workplace
Highlights
Mercury was ranked as a hazardous material for human health and animals such black fish and extra concentration cause dangers disease in human body [1,2]
The carbon nanotubes have a good repeatability in high temperature, So, CNTs introduce a favorite sorbent for mercury removal from air by thermal desorption method [28, 29], the health effect of exposure to solvents, acids and other chemical methods were reduced by proposed method
The adsorption efficiency for Ni-MWCNTs was more than 95% as compared
Summary
Mercury was ranked as a hazardous material for human health and animals such black fish and extra concentration cause dangers disease in human body [1,2]. It is emitted to the atmosphere from chlor-alkali factory, sea, chemical process, coal, oil combustion for energy generation, and metal mining, The contribution of industrial sources for mercury and other heavy metals emissions to the atmosphere, rivers and fish and humans [4]. Human exposure to mercury evaluated and studied in occupational and environmental health [5]. Mercury generated from chemicals, petrochemical and electrical industries [6]. The mercury exposure caused many health problems in human body such as, central nervous system defects, erythrism, arrhythmias, cardiomyopathies, and kidney damage.
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