Biochar from Agricultural by-Products for the Removal of Lead and Cadmium from Drinking Water
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Department of Geology, Mines and Civil Engineering, UTPL, Universidad Técnica Particular de Loja, Barrio San Cayetano Alto, Marcelino Champagnat Street, s/n, Loja 110107, Ecuador
2
Department of Chemical, UTPL, Universidad Técnica Particular de Loja, Barrio San Cayetano Alto, Marcelino Champagnat Street, s/n, Loja 110107, Ecuador
3
Civil Engineering Degree, UTPL, Universidad Técnica Particular de Loja, Barrio San Cayetano Alto, Marcelino Champagnat Street, s/n, Loja 110107, Ecuador
4
Department of Civil Engineering, Institute of Water, University of Granada, Ramón y Cajal Street, 4, 18071 Granada, Spain
*
Author to whom correspondence should be addressed.
Water 2020, 12(10), 2933; https://doi.org/10.3390/w12102933
Received: 29 August 2020
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Revised: 7 October 2020
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Accepted: 14 October 2020
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Published: 20 October 2020
(This article belongs to the Special Issue Biofiltration and Physicochemical Filtration for Water Treatment)
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.
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Keywords:
peanut shell; “chonta” pulp; corn cob; biochar; adsorption; lead; cadmium; drinking water
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MDPI and ACS Style
Puglla, E.P.; Guaya, D.; Tituana, C.; Osorio, F.; García-Ruiz, M.J. Biochar from Agricultural by-Products for the Removal of Lead and Cadmium from Drinking Water. Water 2020, 12, 2933. https://doi.org/10.3390/w12102933
AMA Style
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
Chicago/Turabian StylePuglla, Edgar P., Diana Guaya, Cristhian Tituana, Francisco Osorio, and María J. García-Ruiz. 2020. "Biochar from Agricultural by-Products for the Removal of Lead and Cadmium from Drinking Water" Water 12, no. 10: 2933. https://doi.org/10.3390/w12102933
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