Adsorptive Removal of Carbamazepine and Diatrizoate in Iron Oxide Nanoparticles Amended Sand Column Mimicing Managed Aquifer Recharge

Abstract

Abstract:The sorption-desorption of recalcitrant pharmaceuticals in sand/soil columns can be used to infer performance of managed aquifer recharge. Removal of carbamazepine (CBZ) and diatrizoate (DTZ) from synthetic wastewater, containing 100 µg·L −1 of each pharmaceuticals, was studied in recirculating sand columns amended with uncoated or methacrylic acid (MAA) coated magnetite nanoparticles. Removal of CBZ and DTZ in MAA-magnetite column (68.34% and 61.91%, respectively) was much higher than that with uncoated magnetite (53.47% and 50.26%, respectively). Rapid decrease of dissolved organic carbon concentrations across nanoparticle amended columns (between 42.28% and 50.08% on Day 1), followed by slow recuperation suggests adsorption-desorption dynamics and competition of dissolved organic matter for sorption sites. Core-level binding energy and charge analysis for Fe(2s) and O(1s) in X-ray photoelectron spectroscopy suggests involvement of physisorption process on the NP surfaces.

Polarity Dependence of Transport of Pharmaceuticals and Personal Care Products Through Birnessite-Coated Porous Media

“…Likewise, K F of ciprofloxacin increased by 63% (Table 2). The higher affinities of tetracycline and ciprofloxacin on birnessite-coated sand is possibly due to a higher specific surface area and more adsorption sites of porous media in the columns containing the birnessite-coated sand compared to the uncoated sand columns Huang 2011, Balgooyen et al, 2017;Yoon et al, 2017). In this study, the measured zeta potential of sand and birnessite-coated sand were -36.37 ± 2.88 mV and -17.77 ± 2.72 mV, respectively, indicating that both birnessite-coated sand and sand were negatively charged.…”

Water Quality Considerations on the Rise as the Use of Managed Aquifer Recharge Systems Widens

“…Such insight can be supported by field monitoring, e.g., by using isotopes to assess the relative contribution of different water types to the recovered water in mixed source MAR systems [20], reveal the mobilization of chromium during infiltration of a desert dune sand aquifer [2], to assess retention times [30], or to study factors that affect clogging by, e.g., air bubbles [19]. Laboratory experiments allow one to focus on specific MAR aspects under well controlled conditions, e.g., to study the factors that affect the extent of removal of emerging compounds such as pharmaceuticals [31], or to assess the conditions that affect the risk of colloid-facilitated contaminant transport [32,33] or industrially produced nano-particles in the infiltrated source water. In addition, numerical modeling allows the assessment of water quantity and quality aspects for a wide range of MAR conditions, which can support the feasibility, design and optimization of MAR application [34].…”