<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Nogueira, Miguel</style></author><author><style face="normal" font="default" size="100%">Matos, Inês</style></author><author><style face="normal" font="default" size="100%">Bernardo, Maria</style></author><author><style face="normal" font="default" size="100%">Filomena Pinto</style></author><author><style face="normal" font="default" size="100%">Nuno Lapa</style></author><author><style face="normal" font="default" size="100%">Elena Surra</style></author><author><style face="normal" font="default" size="100%">Fonseca, Isabel</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Char from Spent Tire Rubber: A Potential Adsorbent of Remazol Yellow Dye</style></title><secondary-title><style face="normal" font="default" size="100%">C—Journal of Carbon Research</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2019</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.mdpi.com/2311-5629/5/4/76</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">4</style></number><volume><style face="normal" font="default" size="100%">5</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A char produced from spent tire rubber showed very promising results as an adsorbent of Remazol Yellow (RY) from aqueous solutions. Spent tire rubber was submitted to a pyrolysis process optimized for char production. The obtained char was submitted to chemical, physical, and textural characterizations and, subsequently, applied as a low-cost adsorbent for dye (RY) removal in batch adsorption assays. The obtained char was characterized by relatively high ash content (12.9% wt), high fixed-carbon content (69.7% wt), a surface area of 69 m2/g, and total pore volume of 0.14 cm3/g. Remazol Yellow kinetic assays and modelling of the experimental data using the pseudo-first and pseudo-second order kinetic models demonstrated a better adjustment to the pseudo-first order model with a calculated uptake capacity of 14.2 mg RY/g char. From the equilibrium assays, the adsorption isotherm was fitted to both Langmuir and Freundlich models; it was found a better fit for the Langmuir model to the experimental data, indicating a monolayer adsorption process with a monolayer uptake capacity of 11.9 mg RY/g char. Under the experimental conditions of the adsorption assays, the char presented positive charges at its surface, able to attract the deprotonated sulfonate groups (SO3&amp;minus;) of RY; therefore, electrostatic attraction was considered the most plausible mechanism for dye removal.&lt;/p&gt;
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