Removal of two textile dyes from aqueous solutions onto calcined bones

Abstract

The adsorption of textile dyes such as Direct Red 75 and Direct Red 80 onto calcined bone was studied for their removal from aqueous solutions. The adsorption of Direct Red 75 and Direct Red 80 occurred by studying the effects of adsorbent amount, dye concentration, contact time, pH media and temperature. The adsorption rate data were analyzed using the intraparticle diffusion model, pseudo first order and the pseudo second order kinetic models to determine adsorption rate constants. The isotherms of adsorption data were analyzed by various adsorption isotherm models such as Langmuir, Freundlich and Tempkin. All results found concluded that calcined bone could be effectively employed as an effective new low cost adsorbent for the removal of textile dyes from aqueous solutions.

Removal of a Cationic Dye -Méthylène Bleu- From Aqueous Solution by Adsorption onto Oil Shale Ash of Timahdit (Morocco)

“…In this fact, pH must control the adsorption of dyes onto suspended particles, because both adsorbed molecules and adsorbent particles may have functional groups which are affected by the concentration of H + ions in the solution and which are involved in the molecular adsorption process at the active sites of adsorbent [28].…”

Application of PVDF ultrafiltration membranes to treat and reuse textile wastewater

“…Dyes are widely used in different industries such as textile, leather, paper, plastics, and food [1,2]. There are more than 100,000 different synthetic dyes and their annual production is about 7·10 5 tonnes [3].…”

Estudo Comparativo De Adsorção De Corante Têxtil Utilizando Carvão Ativado E Conchas De Ostras Crassostrea Rhizophorae

“…Carvões ativados comerciais são os materiais adsorventes mais utilizados no tratamento de água por apresentarem alta eficiência de remoção de corantes em efluentes (Belaid et al, 2013). Porém, o custo relativamente elevado desse material, por vezes, faz com que seu uso seja limitado (El Haddad et al, 2013). Assim, pesquisadores têm estudado materiais alternativos, que são relativamente de baixo custo, e ao mesmo tempo apresentam elevada eficiência de adsorção (Huang et al, 2011;Vucurovic, 2013;Wang e Li, 2013).…”

“…Assim, pesquisadores têm estudado materiais alternativos, que são relativamente de baixo custo, e ao mesmo tempo apresentam elevada eficiência de adsorção (Huang et al, 2011;Vucurovic, 2013;Wang e Li, 2013). O uso de tecnologias limpas e adsorventes com preços mais baixos e biodegradáveis pode ser uma boa alternativa para minimizar o impacto ambiental causado pelos efluentes têxteis (El Haddad et al, 2013). O uso de resíduos para tratar efluentes pode aumentar a disponibilidade de materiais como o carvão ativado, para fins mais nobres.…”