Journal
JOURNAL OF ENVIRONMENTAL ENGINEERING
Volume 146, Issue 7, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)EE.1943-7870.0001714
Keywords
Sorption; Concrete demolition waste; Heavy metals ions; Isotherm; Transport
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This study investigated the possibility of using granules of crushed concrete demolition waste (CCDW) as a reactive medium in a permeable reactive barrier (PRB) to remediate groundwater contaminated with heavy metals. Factors inFLuencing the process of sorption, such as the contact time, initial metal concentration, agitation speed, and sorbent dosage, were studied. The sorption data were described using four isotherm models (Langmuir, Freundlich, Redlich-Peterson, and Radke-Prausnitz), whereas the continuous experimental results were fitted with three breakthrough curve models (Thomas, Bohart-Adams, and Yan). The performance of the reactive barrier in the set of continuous column experiments was monitored using different effluent contaminant concentrations of groundwater, hydraulic conductivity, and solution pH.
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