Assessment of Chemically Modified Lignocellulose Waste for the Adsorption of Cr (VI)

摘要: espanolEl Cr(VI) tiene efectos cancerigenos y mutagenicos en seres vivos. La bioadsorcion se presenta como alternativa a las tecnologias convencionales para tratamiento de aguas residuales. El objetivo del presente estudio fue evaluar el uso la tusa maiz modificada con acido citrico cascara naranja cloruro calcio, remocion Cr (VI) sistema por lotes evaluando efecto pH tamano particula. Los biomateriales caracterizaron analisis quimico, elemental FTIR, evidenciando presencia grupos hidroxilo, carbonilo carboxilo, pertenecientes celulosa lignina estos les atribuye propiedades centros activos intervinientes proceso adsorcion. experimentos adsorcion realizaron utilizando una solucion Dicromato potasio 100 ppm, 150 rpm 2, 3, 4 6 tamanos particula 0,355, 0,5 1 mm, encontrandose que los porcentajes maximos obtuvieron 2 0.355 usando naranja; concentracion final metal determino standard metodo ASTM D 1687-02 1,5-difenilcarbazida 540 nm. Se evaluo cinetica e isotermas mejores condiciones encontradas, obteniendose datos experimentales fueron ajustados al modelo Pseudo-segundo orden Freundlich, respectivamente, R2>0,95; esto sugiere es controlado reaccion quimica sucede multicapas. obtuvo siguiente desempeno biomasas terminos q0: maiz>naranja>tusa maiz-mod>naranja-mod. EnglishChromium (Cr(VI)) presents carcinogenic and mutagenic effects in living beings. Biosorption is an alternative to conventional technologies for the treatment of waste water. The aim this study was assess use corncob orange peels modified with citric acid calcium chloride, respectively, removal using batch system taking into account particle size. Biomaterial were characterized chemical analysis, which evidenced presence hydroxyl, carbonyl carboxyl groups, belonging cellulose lignin that are attributed active centers intervene adsorption process. Adsorption experiments through performed solution potassium dichromate at rpm, varying (2, 6) size (0.355, 0.5 mm). From results found maximum percentage obtained peels. Final concentration determined by method D1687-02 1,5-diphenylcarbazide kinetics isotherms assessed best conditions found, experimental data adjusted Pseudo-second order Freundlich models, respectively. R2 value greater than 0.95 suggests process controlled reaction leading formation multilayers. performance biomass terms q0 be: corncob>orange peels>corncob modified>orange modified.