TITLE:
Study of the Textural Properties of Bovine Bones Char under Different Conditions
AUTHORS:
Juan C. Moreno-Piraján, Liliana Giraldo, Vanessa S. García-Cuello
KEYWORDS:
Adsorption, Heavy Metals, Water, Immersion Calorimetry, Bovine Bone
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.3 No.3,
March
7,
2011
ABSTRACT: Environmental pollution is today a very important issue and the development of low cost materials and different sources need to be investigated. Our research group for several years she has been the development of adsorbent materials for industrial wastewater treatment and rivers. In this research compares the porosity developed by two different treatments using bovine bones to adsorb metal ions. Using bovine bones as raw material, two carbonized samples were obtained under different conditions. One of the carbonized samples was obtained in an oxidizing atmosphere at up to 600℃ for 2 hours. The other was obtained in an inert atmosphere at up to 800℃, during 2 hours. Different textural characteristics were obtained in each of the carbonized samples according to the conditions of synthesis. The carbonized sample obtained in the oxidizing atmosphere, CHUOX, produces a great pore distribution, with a significant mesopore volume, reflected in the hysteresis loop, while in carbonized bone obtained in an inert atmosphere, CHUN, a formation of micropores and mesopores smaller than that obtained in the other carbonized sample is observed. The surface area obtained is 130 m2 g-1 for CHUOX and 170 m2 g-1 for CHUN. Furthermore, the adsorption capacity of Ni2+ and Cu2+ ions from solution was measured for these two carbonized samples, and a higher retention of both ions in the carbonized sample obtained in the inert atmosphere was found, with values between 28.57 and 67.56 mg g-1. The immersion enthalpies of carbonized samples in ion solutions are determined with an exothermic effect for the solution-solid interaction.