Application of Brazilian pine-fruit shell as a biosorbent to removal of reactive red 194 textile dye from aqueous solution

Biological activities and chemical constituents of Araucaria angustifolia : An effort to recover a species threatened by extinction

“…The contents of ash, crude protein, total lipids, total fibers and other carbohydrates are 1.50%, 3.42%, 1.67%, 1.29% and 48.42%, respectively (da Silva et al, 2016). Among carbohydrates, starch is the main component,comprising around 31-36%, averaging 30% amylose in the raw seed (BelloPérez et al, 2006;Conforti and Lupano, 2007;2008). The content of soluble sugars in the A. angustifolia seed is relatively low, especially after cooking (Cordenunsi et al, 2004).…”

“…Several authors (Lima et al, 2007;2008;Royer et al, 2009;Calvete et al, 2009; studied the use of the pinhão coat as an alternative for promoting the adsorption of metal ions and dyes, potentially carcinogenic, from aqueous solutions in the treatment of industrial effluents. All studies argue that the pinhão coat can be a powerful and inexpensive tool for removing heavy metals and dyes in the treatment of effluents from tannery and metallurgical industries.…”

Sorption of the anionic reactive red RB dye in cellulose: Assessment of kinetic, thermodynamic, and equilibrium data

“…After this period, the centrifugation was performed and an aliquot of the supernatant solution was removed, and the remainder quantity of dye was determined by the absorbance measurements. The result showed the necessary time to reach the maximum adsorption capacity of the adsorbent used [18]. The experimental data obtained was studied with the pseudo-first order [19], pseudosecond order [20], intra-particle diffusion [21], and Elovich [22] adsorption kinetic models.…”

Evaluation of sugar-cane bagasse as bioadsorbent in the textile wastewater treatment contaminated with carcinogenic congo red dye

“…Owing to the adverse environmental effects, some processes to remove the dyes from the textile wastewater have been evaluated including the use of bioadsorbents. Active carbon is the most used adsorbent (Namasivayam and Kavitha, 2002;Lin et al, 2008;Ong et al, 2008); however, due to its high cost and considering the huge quantities of wastewater to be treated, efforts have been made to use the bioadsorbents of considerable lower cost, such as cellulose (Annadurai et al, 2002), chitosan (Chatterjee et al, 2007), sawdust (Garg et al, 2003), sugar cane (Khattri and Singh, 1999;Pandey et al, 2000), Brazilian pine-fruit shell (Lima et al, 2008) and others agricultural residues (Chandran et al, 2002). The adsorption process has demonstrated to be relevant when compared to other techniques for water reuse, since it has very low initial cost, easy operation, flexibility and simplicity.…”