期刊名称：Revista Internacional de Contaminación Ambiental
印刷版ISSN：0188-4999
出版年度：2017
页码：93-98
语种：Spanish
出版社：Centro de Ciencias de la Atmósfera
摘要：Mining is one of the most important economic activities for many countries and Mexico is not the exception. However, liquid wastes generated by this activity pose a risk to the environment because they are characterized by its high content of metal ions and low pH values. Currently, the adsorption process in chitosan is an alternative to conventional treatments in the recovery of heavy metals from aqueous solutions. In this study we obtained both, pure and modified chitosan hydrogels from shrimp shell to carry out adsorption tests of copper in acid solution. The effects of contact time, pH, adsorbent mass, and initial copper concentration were investigated. The experimental results showed that the optimal adsorption conditions of copper were as follows: pH 4, adsorbent mass (pure chitosan) 4.5 g, and contact time of 4 h. Under these conditions, the 99.35 % of removal was achieved. In addition, adsorption tests were conducted with three different initial concentrations (160, 250 and 416 ppm) of copper in acid solution. It was observed that, at lower concentration the higher removal percentage, reaching up to 92 % for 160 ppm, as well as 72 and 67.3 % for 250 and 416 ppm, respectively. As a result, the pure chitosan hydrogel beads can be used as an effective adsorbent for the removal of copper from mining leachates.
