Influence of Humic Acid on the Transport of Two Types of Synthesized Zinc Oxide Nanoparticles in Quartz Sand
Open Access
- 26 September 2021
- journal article
- research article
- Published by MDPI AG in Applied Sciences
- Vol. 11 (19), 8957
- https://doi.org/10.3390/app11198957
Abstract
In this study, transport and retention behaviors of the two types of nZnO prepared with separate manufacturing methods were compared/analyzed according to the presence/absence of Suwannee River humic acid (SRHA) adsorbed into the sand surface and the SRHA suspended in bulk solution, and to changes in the solution ionic strength (0.1–10 mM) in sand-repacked water-saturated columns. In the absence of suspended SRHA, nZnO-1 breakthrough was observed only in SRHA-coated soil, and the breakthrough amount decreased with the increase in the ionic strength (23.8% to 17.2% at 0.1 mM to 10 mM, respectively). In contrast, nZnO-2 breakthrough was not observed over the entire ionic strength range, regardless of the SRHA sand coating. With the presence of suspended SRHA, neither nZnO-1 nor nZnO-2 showed a significant difference in the breakthrough amount regardless of sand coating or ionic strength. However, the breakthrough amount of nZnO-1 was higher than that of nZnO-2 (51.5% versus 37.7% at 10 mM with 1 mg/L SRHA). From confirming the difference in transport between the two types of nZnO, the amount of SRHA adsorbed into nZnO-1 was less than the amount adsorbed into nZnO-2 (0.29 mg/g versus 0.64 mg/g at 10 mM with 1 mg/L SRHA). This result was considered to be due to the larger nZnO-1 breakthrough amount than the nZnO-2 breakthrough amount, which was caused by the larger amount of suspended SRHA that could occupy the deposition sites in the nZnO-1 suspension. Because the rate of SRHA deposition on the sand surface was higher than on nZnO, nZnO transport improved in the presence of suspended SRHA, and changed according to the amount of suspended SRHA.This publication has 62 references indexed in Scilit:
- Influence of natural organic matter on the transport and deposition of zinc oxide nanoparticles in saturated porous mediaJournal of Colloid and Interface Science, 2012
- Transport and Retention of TiO2 Rutile Nanoparticles in Saturated Porous Media under Low-Ionic-Strength Conditions: Measurements and MechanismsLangmuir, 2011
- Effect of dissolved organic matter on the stability of magnetite nanoparticles under different pH and ionic strength conditionsScience of The Total Environment, 2010
- Concurrent Aggregation and Deposition of TiO2 Nanoparticles in a Sandy Porous MediaEnvironmental Science & Technology, 2010
- Coupled factors influencing the transport and retention of Cryptosporidium parvum oocysts in saturated porous mediaWater Research, 2010
- Transport in Porous Media of Highly Concentrated Iron Micro- and Nanoparticles in the Presence of Xanthan GumEnvironmental Science & Technology, 2009
- The effect of zinc oxide and titanium dioxide nanoparticles in the Comet assay with UVA photoactivation of human sperm and lymphocytesNanotoxicology, 2009
- Piezoelectric Nanogenerators Based on Zinc Oxide Nanowire ArraysScience, 2006
- Influence of Natural Organic Matter and Ionic Composition on the Kinetics and Structure of Hematite Colloid Aggregation: Implications to Iron Depletion in EstuariesLangmuir, 2004
- Synthesis of zinc oxide nanoparticles with controlled morphologyJournal of Materials Chemistry, 1999