Resumo

RINCONES POYER, Félix; VALLADARES, Shirley Marfisi; DANGLAD FLORES, José Ángel  e  SALAZAR PALENCIA, Victoria. Adsorption of petroleum hydrocarbons in water by a column packed with sugarcane bagasse. Saber [online]. 2015, vol.27, n.3, pp.441-453. ISSN 2343-6468.

An experimental study was carried out on the adsorption of petroleum hydrocarbons (kerosene, diesel and heptane) from oily water flowing through a fixed bed column packed with hydrophobic sugarcane bagasse particles. The latter were previously hydrophobized with nonionic surfactant Span 80 (sorbitan monooleate, HLB 4,3) to change the absorption capacity of the substrate. The effects of initial contaminant concentration, feed flow rate and bed height on the column´s adsorption capacity and operation time, were analyzed by means of a multifactorial design. In general, the results showed that hydrocarbon removal efficiencies were greater than 90%, which indicated the feasibility of using hydrophobic sugarcane bagasse as an adsorbent bed. The effects of feed flow rate and bed height were statistically significant (p < 0,01) for bed adsorption capacity and operation time, being 574 mg hydrocarbon/g bed and 430 min their respective maximum values. Experimental results could be predicted by surface mathematical models with correlation coefficients greater than 90% for 99% of confidence. A physical desorption process for bed regeneration was used, which led to recover up to 35% of the original bed capacity, with a calorific value of 45.408 kJ/kg ± 37, with an increase of 40% over that of the hydrocarbon free bagasse (32.381 kJ/kg ± 325).

Palavras-chave : Hydrophobic bed; oily water; adsorption; surfactan.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )