Removal of Hg (II) metal ions from environmenta water samples using chemically modified natural sawdust

Abstract

In the present study, chemically modified natural saw dust (CMSD) sorbent was prepared via refluxing reaction between citric acid and sawdust. Then, the as prepared CMSD was characterized using scanning electron microscopy (SEM) and FT-IR. The adsorption capability of CMSD towards Hg(II) was significantly increased because of the introduction of carboxylic groups on CMSD's surface during the modification, and the adsorption capability was linearly reliant on carboxylic sites level to some extent. The prepared CMSD was employed for removal of Hg(II) from different samples. Sorption parameters which include pH, temperature, contact time and sorbent and metal ion concentrations were evaluated to determine the best conditions for sorption of Hg(II) onto CMSD sorbent. In addition, the sorption uptake of CMSD was 80 mg g -1 . The prepared CMDS was successfully applied to remove Hg(II) from environmental water samples with recovery % , more than 95%.

Surfactant supported chitosan for efficient removal of Cr(VI) and anionic food stuff dyes from aquatic solutions

“…Many treatment technologies are employed for the removal of pollutants from wastewater like coagulation 22 , solvent extraction 23 , ion exchange 24 , flotation 25 – 27 , cloud point extraction 28 , liquid–liquid extraction 29 , photocatalytic degradation 30 , 31 , and adsorption 32 – 38 . Adsorption is considered to be one of the best methods for removal of contaminants from wastewater due to its efficiency, the ease and low cost of the operation compared to other processes.…”