Morales Diaz, V. J. ., Jave Nakayo, J. L. . and Benites Alfaro, E. . (2018) “Use of coffee grind with cocoa shell as the basis for a filter to reduce lead from contaminated water from a river, Peru”, Journal of Energy & Environmental Sciences, 2(2), pp. 24–29. Available at: https://journals.cincader.org/index.php/eesj/article/view/38 (Accessed: 22 April 2026).