Removal of methylene blue dye from aqueous solutions by adsorption using yellow passion fruit peel as adsorbent.
The removal of color from aquatic systems caused by presence of synthetic dyes is extremely important from the environmental viewpoint because most of these dyes are toxic, mutagenic and carcinogenic. In this present study, the yellow passion fruit (Passiflora edulis Sims. f. flavicarpa Degener) peel a powdered solid waste, was tested as an alternative low-cost adsorbent for the removal of a basic dye, methylene blue (MB), from aqueous solutions. Adsorption of MB onto this natural adsorbent was studied by batch adsorption isotherms at room temperature. The effects of shaking time and pH on adsorption capacity were studied. An alkaline pH was favorable for the adsorption of MB. The contact time required to obtain the maximum adsorption was 56 h at 25 degrees C. Yellow passion fruit peel may be used as an alternative adsorbent to remove MB from aqueous solutions.
Pavan
Flávio André
FA
Instituto de Química, Universidade Estadual de Campinas, UNICAMP, PO Box 6154, 13084-971 Campinas, SP, Brazil. flavioapavan@yahoo.com.br <flavioapavan@yahoo.com.br>
Mazzocato
Ana Cristina
AC
Gushikem
Yoshitaka
Y
D000327:Adsorption; D005638:Fruit; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008751:Methylene Blue / Q000302:isolation & purification*; D029598:Passiflora; D012037:Refuse Disposal; D012996:Solutions
D012996:Solutions; D008751:Methylene Blue