Use of Forestry Wastes for Biosorption of Dyes and Cr (VI)

Abstract

The pine cone and oak cups pulp were used as low-cost adsorbents for the removal of basic (Basic Red 18) and acidic (Acid Red 111) dyes and Cr (VI) from aqueous solutions. The adsorbents were modified by HNO3to improve their biosorption capacity. The adsorbents were characterized using scanning electron microscopy and FTIR spectroscopy. The zeta potential was determined as a function of the pH, in order to explain the effect of pH on electrostatic adsorption ability of biosorbent. Modification of adsorbents with nitric acid led to an increase in accessibility of some functional groups on the surface or a decrease in negativity of surface charge. The modification of pine cone increased its adsorption capacity for the basic dye, whereas the modification of oak cups pulp decreased the adsorption ability for basic dye to some extent. The adsorption isotherms fitted the Langmuir model. The adsorption capacities were found to be 142.85, 158.73, and 156.20 mg g-1 for modified and raw pine cone and oak cups pulp, respectively. The acidic dye and Cr (VI) adsorptions were much lower compared to basic dye on all tested adsorbents. The results indicated that the forest wastes (pine cone and oak cups pulp) were an attractive candidate for basic dyes from aqueous solution.

Removal of Cr(VI) from Aqueous Solutions Using Powder of Potato Peelings as a Low Cost Sorbent

“…The adsorption of Cr(VI) by a number of materials such as agroindustry waste residues [ 1 – 4 ], forestry waste [ 5 , 6 ], fruit peelings and leaves [ 7 – 10 ], fungi [ 11 , 12 ], dead bacterial, and diatom biomass [ 13 – 15 ] has been reported in the literature.…”

Dye Removal from Aqueous Solution using Low Cost Bioadsorbents Derived from Agricultural Waste: A Review

“…Waste green tea biomass as such and chemically modified using phosphoric acid, sulphuric acid; hydrochloric acid, tartaric acid, sodium hydroxide and hydrogen peroxide were evaluated for the removal of malachite green from aqueous solution. The study concluded that maximum removal efficiency for the uptake of malachite green from aqueous solution was possessed by sulphuric acid modified waste green tea waste and raw green tea waste exhibited least removal efficiency [40]. The evaluation of almond shells for the removal of methyl orange from aqueous solution concluded that equilibrium data and adsorption kinetics well fitted to Langmuir adsorption isotherm and pseudo second order kinetic model.…”

Investigation of Copper removal mechanisms on Quercus robur acorn caps: Equilibrium, kinetics, thermodynamic and characterization studies

“…There are also removal studies that have been carried out copper, other metals and pollutants focused on Quercus robur and other Quercus species, such as total Cr and Cr(VI) removal with Quercus robur acorn peel (Kuppusamy et al 2016), cationic dye removal with Quercus robur acorn peel (Kuppusamy et al 2017), Zn(II), Cu and Al (III) removal with Quercus robur acorn cap (Zeybek 2019), copper removal with Quercus robur acorn cap (Zeybek et al 2019), Cu, Ni and Cr removal with Quercus coccifera sawdust (Argun et al 2007), dyes and Cr (VI) removal with Quercus alegilops valonea and Pinus pinea cone pulp mix (Berraksu et al 2012), Cr(VI) and total chromium removal by acorn shell of Quercus crassipes Humb. & Bonpl (Aranda-García et al 2014).…”