The effect of pH and chitin preparation on adsorption of reactive dyes

• Autorzy: Klimiuk E , Filipkowska U. , Wojtasz-Pajak A.
• Języki publikacji: EN

Abstrakty

EN

The effect of chitin preparation with HCl (chitin A) and with HCl and KOH (chitin B) and pH on the adsorption of reactive dyes (helactine, polactine and remazol) on chitin was investigated. The double Lang- muir equation was appropriate to analyze the dependence between amount of the adsorbed dye on chitin (Q) and its equilibrium concentration (C). It indicated the presence of two types of active sites which differed in both the maximum adsorption capacity (b) and adsorption affinity (K). Based on the dimensionless separa­tion factor R it was found that the dye adsorption mechanism in type I sites was an ion exchange, whereas in the case of type II sites it was a physical adsorption. The adsorption capacity of the chitin A (deacetylation degree of 3%) for samples without pH adjustment ranged from 29 (Red D-8B) to 67 mg/g dry weight of chitin (Gelb GR). At pH 3.0 the adsorption capacity was higher from 1.9 to 2.3-fold. The most favourable effect of pH change was found for helactine dyes. The adsorption capacity of the chitin B (deacetylation degree of 5%) was from 66 (Brillantorange 3R) to 101 mg/g dry weight of chitin (Gelb GR). After pH adjustment to pH 3.0 the adsorption capacity ranged from 160 (Ruby F-2B) to 294 mg/g dry weight of chitin (Blau 3R). The most favourable effect of deacety- lation degree increase was found in the case of helactine dyes in the samples without pH adjustment, and polactine and remazol dyes at pH 3.0.

Słowa kluczowe

EN

reactive dye; textile industry; decolourization; chitin preparation; modified chitin; colour effluent; pH; deacetylation degree; dye; Langmuir equation; adsorption

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2003
• Tom: 12
• Numer: 5
• Opis fizyczny: p.575-588,fig.

Twórcy

autor

Klimiuk E

• University of Warmia and Mazury in Olsztyn, Olsztyn, Poland

autor

Filipkowska U.

autor

Wojtasz-Pajak A.

Bibliografia

• 1. MORAIS L.C., FREITAS O.M., GONÇLVES E.P., VAS­CONCELOS L.T., GONZÁLEZ BEÇA C.G. Reactive dyes removal from wastewaters by adsorption on eucalyptus bark: variables that define the process. Wat. Res., 33, 979, 1999.
• 2. EL-GEUNDI M.S. Colour removal from textile effluents by adsorption techniques. Wat. Res., 25, 271, 1991.
• 3. MCKAY G., EL-GEUNDI M., NASSAR M.M. Equilib­rium studies during the removal of dyestuffs from aqueous solutions using bagasse pith. Wat. Res., 21, 1513, 1987.
• 4. BRZEZIŃSKI S., SCHMIDT H. Ekologiczne aspekty ap­likacji barwników. Barw., środ. pomoc., 40, 29, 1996.
• 5. WEBER E.J., STICKNEY V.C. Hydrolysis kinetics of reac­tive blue 19-vinyl sulfone. Wat. Res., 27, 63, 1993.
• 6. MAMIŃSKA M. Nowa grupa barwników w asortymencie Z.P.B. „BORUTA"S.A. Maszynopis, Zgierz, 1990.
• 7. SAFARIK I. Removal of organic polycyclic compounds from water solutions with a magnetic. Wat. Res., 29, 101­105, 1995.
• 8. STANLEY W.I., WATLERS G.G., CHAN B. Lactate and other enzymes bound to chitin with glutaraldehyde. Biotechnol. Bioerg., 17, 315, 1975.
• 9. HERMANOWICZ W., DOŻAŃSKA W., DOJLIDO J., KOZIOROWSKI B. Fizyczno chemiczne badanie wody i ścieków. Arkady, Warszawa, 1999.
• 10. ROBERTS A.A.F. Determination of the degree of N-acetylation of chitin and chitosan. In: Chitin Handbook. Muzzarelli R. A. A., Peter M. G. (eds), Atec Edizioni, Grottammare, Italy, pp. 127-132, 1997.
• 11. MUZZARELLI R.A.A. Chitin. Faculty of Medicine, Uni­versity of Ancona, Italy. 1976.
• 12. CHEMIA FIZYCZNA. Praca zbiorowa. PWN. 1965.
• 13. STERRITT R.M., LESTER J.N. Heavy metal immobilisa­tion by bacterial extracellular polymers. In: Immobilisation of ions by bio-sorption. Ed.: Chichester: Ellis Horwood. London, pp. 121-147. 1986.
• 14. HUGHES M.N., POOLE R.K. Metals and micro-organisms. Ed.: Chapman, Hall. London, 1989.
• 15. AMACHER M.C., KOTUBY-AMACHER J., SELIM H.M., ISKANDAR I.K. Retention and release of metals by soils - evaluation of several models. Geoderma, 38, 131, 1986.
• 16. AL-DEGS Y., KHRAISHEH A.M., ALLEN S.J., AHMAD M.N. Effect of carbon surface chemistry on the removal of reactive dyes from textile effluent. Wat. Res., 34, 927, 2000.
• 17. BRANDT S. Analiza danych. PWN. Warszawa, 1998.
• 18. KRYSICKI W., BARTOS J., DYCZKA W., KRÓLIKOWS­KA K., WASILEWSKI M. Rachunek prawdopodobieństwa i statystyka matematyczna w zadaniach: Cz. II. PWN, Warszawa, 1986.
• 19. KOWAL A.L, ŚWIDERSKA-BRÓŻ M. Oczyszczanie wody. PWN, Warszawa - Wrocław, 1996.
• 20. KARCHER S., KORNMULLER A., JEKEL M. Removal reactive dyes by sorption/complexation with cucurbituril. Wat. Sci. Technol., 40, 425, 1999.
• 21. ŁEBEK J., WARDAS W. Adsorption of some textile dyes on post-vanilin lignin during its precipitation. Cellulose Chem. Technol., 30, 213, 1996.