Comparative study on adsorptive removal of Cu, Pb, Zn heavy metals by modified perlite composites

Abstract

a b s t r a c tThis study examined the removal of heavy metals Cu 2+ , Pb 2+ , Zn 2+ from water solution by using perlite, perlite activated with oxalic acid and perlite modified with chitosan. The adsorption isotherms were also calculated. The conditions that affect the adsorption process were asserted as pH, adsorption dose and operation time. The highest adsorption yield among the four different adsorbent examined was provided by perlite activated with oxalic acid. The metal holding capacities were determined as 16.72 mg/g for Cu, 18.48 mg/g for Pb and 14.184 mg/g for Zn. This capacity was interpreted as the indicator of usability on the heavy metal removal functions in industrial treatment facilities. The experimental metal sorption of perlite activated forms is described best by the Freundlich adsorption isotherm model with determination values over 0.99. The research results prove that perlite and modified perlite are good natural adsorbents for the removal of heavy metal from water.

Modified coal fly ash for textile dye removal from industrial wastewater

“…The effect of the selected optimal conditions on COD, BOD 5 , TDS, TSS and dyes removal efficiency was investigated using the pilot plant. The utilized TCFA doses were 2, 3 and 4 gL −1 for industrial wastewater with initial dye concentration ranges (0-10), (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) and (20-30) mgL −1 respectively. The applied contact time was 0.5 h with mixing speed 150 r.p.m and sedimentation time equal to 15 min.…”

“…16,17 The most significant use of the adsorption method is the removal of colorants from industrial effluent using suitable adsorbents. [18][19][20] Adsorption is a desirable and efficient alternative method of treating industrial wastewater, particularly if the adsorbent is inexpensive, widely accessible, and reusable. Industrial or agricultural wastes have been used as adsorbents in a number of studies over the past several years, and the results indicate that these wastes have varying degrees of adsorption capability.…”