Biochar from Agricultural by-Products for the Removal of Lead and Cadmium from Drinking Water
Metadata
Show full item recordEditorial
MDPI
Materia
Peanut shell Chonta Pulp Corn cob Biochars Adsorption Lead Cadmium Drinking water
Date
2020Referencia bibliográfica
Puglla EP, Guaya D, Tituana C, Osorio F, García-Ruiz MJ. Biochar from Agricultural by-Products for the Removal of Lead and Cadmium from Drinking Water. Water. 2020; 12(10):2933. [https://doi.org/10.3390/w12102933]
Sponsorship
Universidad Tecnica Particular de Loja -EcuadorAbstract
This study reports the adsorption capacity of lead Pb2+ and cadmium Cd2+ of biochar
obtained from: peanut shell (BCM), “chonta” pulp (BCH) and corn cob (BZM) calcined at 500, 600 and
700 ◦C, respectively. The optimal adsorbent dose, pH, maximum adsorption capacity and adsorption
kinetics were evaluated. The biochar with the highest Pb2+ and Cd2+ removal capacity is obtained
from the peanut shell (BCM) calcined at 565 ◦C in 45 min. The optimal experimental conditions were:
14 g L−1
(dose of sorbent) and pH between 5 and 7. The sorption experimental data were best fitted
to the Freundlich isotherm model. High removal rates were obtained: 95.96% for Pb2+ and 99.05. for
Cd2+. The BCH and BZM revealed lower efficiency of Pb2+ and Cd2+ removal than BCM biochar.
The results suggest that biochar may be useful for the removal of heavy metals (Pb2+ and Cd2+) from
drinking water.