|
|||||
|
|
Calorimetric study of the immersion heats of lead(II) and chromium(VI) from aqueous solutions of Colombian coffee husk |
|
| Authors: | Y Ladino-Ospina L Giraldo-Gutierréz J C Moreno-Piraján |
| Institution: | (1) Chemistry Department Professor, Universidad Pedagógica Nacional de Colombia, Calle 72 No.12-09, Bogotá, Colombia;(2) Chemistry Department Professor, Calorimetry Laboratory, Universidad Nacional de Colombia, Ciudad Universitaria, Bogotá, Colombia;(3) Chemistry Department Professor, Universidad de Los Andes, Research Group on Porous Solids and Calorimetry, Carrera 1 No. 18 A 10, Bogotá, Colombia |
| Abstract: | Summary This work shows the result of the study of the Pb(II) and Cr(VI) ions adsorption by means of a Calvet type calorimeter of heat conduction that can operate at 150şC. The calorimeter was electrically calibrated to establish its sensitivity and reproducibility, obtaining K=12.95±0.05 W V-1 and chemically it was examined with tris-(hydroxymethyl)-aminomethane (THAM)-HCl system, obtaining ΔH= -30.91±0.03 kJ mol-1. The activated carbon sample obtained from coffee husk and the calorimetric results obtained were related to other techniques used to perform this type of studies. |
| Keywords: | adsorption isotherm calibration of calorimeter immersion calorimetry |
| 本文献已被 SpringerLink 等数据库收录！ | |