DSpace Repository

Mechanistic understanding of crystal violet dye sorption by woody biochar: implications for wastewater treatment

Show simple item record

dc.contributor.author Wathukarage, A.
dc.contributor.author Herath, I.
dc.contributor.author Iqbal, M.C.M.
dc.contributor.author Vithanage, M.
dc.date.accessioned 2017-12-15T08:47:46Z
dc.date.available 2017-12-15T08:47:46Z
dc.date.issued 2017-08-17
dc.identifier.citation Wathukarage, A., Herath, I., Iqbal, M.C.M., Vithanage, M. (2017). "Mechanistic understanding of crystal violet dye sorption by woody biochar: implications for wastewater treatment", Environmental Geochemistry and Health, pp. 1-15 en_US, si_LK
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/6853
dc.description.abstract Attached en_US, si_LK
dc.description.abstract Dye-based industries, particularly small and medium scale, discharge their effluents into waterways without treatment due to cost considerations. We investigated the use of biochars produced from the woody tree Gliricidia sepium at 300 C (GBC300) and 500 C (GBC500) in the laboratory and at 700 C from a dendro bioenergy industry (GBC700), to evaluate their potential for sorption of crystal violet (CV) dye. Experiments were conducted to assess the effect of pH reaction time and CV loading on the adsorption process. The equilibrium adsorption capacity was higher with GBC700 (7.9 mg g-1 ) than GBC500 (4.9 mg g-1 ) and GBC300 (4.4 mg g-1 ), at pH 8. The CV sorption process was dependent on the pH, surface area and pore volume of biochar (GBC). Both Freundlich and Hill isotherm models fitted best to the equilibrium isotherm data suggesting cooperative interactions via physisorption and chemisorption mechanisms for CV sorption. The highest Hill sorption capacity of 125.5 mg g-1 was given by GBC700 at pH 8. Kinetic data followed the pseudo-secondorder model, suggesting that the sorption process is more inclined toward the chemisorption mechanism. Pore diffusion, p–p electron donor–acceptor interaction and H-bonding were postulated to be involved in physisorption, whereas electrostatic interactions of protonated amine group of CV and negatively charged GBC surface led to a chemisorption type of adsorption. Overall, GBC produced as a by-product of the dendro industry could be a promising remedy for CV removal from an aqueous environment
dc.language.iso en_US en_US, si_LK
dc.publisher Environmental Geochemistry and Health en_US, si_LK
dc.subject Chemisorption en_US, si_LK
dc.subject Physisorption en_US, si_LK
dc.subject Cationic dyes en_US, si_LK
dc.subject Wastewater treatment en_US, si_LK
dc.subject Crystal violet en_US, si_LK
dc.subject Gliricidia en_US, si_LK
dc.title Mechanistic understanding of crystal violet dye sorption by woody biochar: implications for wastewater treatment en_US, si_LK
dc.type Article en_US, si_LK


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account