Abstract
The aim of the research is to measure the cadmium absorption capacity of a biochar obtained from cocoa shells of clone CCN51, in the province of El Oro, in southern Ecuador on the border with Peru. The biochar was obtained by calcination in a muffle at 300 °C for 2 hours, which were crushed and sieved (2 mm mesh). They were then characterized by elemental chemical analysis and their functional composition by infrared spectroscopy. Porosity was determined by scanning electron microscopy. The Cd adsorption process was carried out in a plastic column filled with 20 g of biochar through which a 20 ppm Cd solution was passed by means of a peristaltic pump with a flow rate of 10 mL/s for 75 minutes, taking samples every 15 minutes. The results were: 27.07 % lignin, 56.2% cellulose, 13.66% ash and 3.15% hemicellulose, pH 9.86 and electrical conductivity of 2.77 dS/m2. The functional groups were: -OH, -NH, C=C, C=O and COO. The average pore size of the biochar was 3.00 um ±1.09. A qmax of 5.60 mL/g was determined from the Langmuir isotherm, while with the Freundlich isotherm the absorption intensity (n) of Cd was 0.06. These results suggest that farmers have opportunities to achieve environmental, social, and economic sustainability with the use of this biomass.
Presenters
Salomon Barrezueta UndaResearcher, Agriculture, Machala Technical University, El Oro, Ecuador Maylin Rios
Researcher, Bioenergy, Universidad Técnica de Machala, El Oro, Ecuador Hugo Romero
Environmental Chemisty, Industrial engineering , Universidad San Ignasio de Loyola , Perú, Peru
Details
Presentation Type
Paper Presentation in a Themed Session
Theme
KEYWORDS
BIOMASS, ABSORPTION, SUSTAINABILITY
