Toledo, L. B.-.; Vega, S. C. .; Milla, D. E. A. .; Contreras, A. B. .; Ramos, C. T.-.; Pisfil, J. M. .; Miranda, B. M. .; Farfán, R. S. . Immobilization of Lead by Phosphated Biochar Produced from Fish Farming Sludge and Sewage Sludge in a Contaminated Urban Soil. ijmst 2023, 10, 1347-1356.