2020. Characteristics of Silica Sand from Alvarado, Veracruz, Mexico as material for Permeable Reactive Barriers for the Remediation of Aquifers contaminated with leachates from uncontrolled landfills. Enfoque UTE. 11, 4 (Oct. 2020), pp. 87 – 100. DOI:https://doi.org/10.29019/enfoqueute.v11n4.674.