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Transport characteristics of nanoscale zero-valent iron carried by three different "vehicles" in porous media

, : Transport characteristics of nanoscale zero-valent iron carried by three different "vehicles" in porous media. Journal of Environmental Science and Health. Part A, Toxic/Hazardous Substances & Environmental Engineering 49(14): 1639-1652

This study investigated the transport properties of nanoscale zero-valent iron (Fe(0)) (nZVI) carried by three vehicles: water, sodium dodecyl sulfate (SDS) solution, and SDS foam. Batch experiments were conducted to assess the sedimentation capability of nZVI particles in these three vehicles. Column experiments were conducted to investigate the transport properties of nZVI in porous media formed with different sizes of sand (0.25 mm to 0.5 mm, 0.5 mm to 0.9 mm, and 0.9 mm to 1.4 mm). Three main results were obtained. First, the batch experiments revealed that the stabilities of nZVI particles in SDS solution and SDS foam were improved, compared with that of nZVI particles in water. Moreover, the sedimentation of nZVI in foam was closely associated with the foam drainage volume. The nZVI content in foam was similar to that in the original foaming suspension, and the nZVI particle distribution in foam became significantly more uniform at a stirring speed of 3000 r/min. Second, the transport of nZVI was enhanced by foam compared with water and SDS solution for 0.25 mm to 0.5 mm diameter sand. For sand with diameters of 0.5 mm to 0.9 mm and 0.9 mm to 1.4 mm, the mobility of nZVI carried by SDS solution was optimal, followed by that of nZVI carried by foam and water. Thus, the mobility of nZVI in finer sand was significantly enhanced by foam, compared with that in coarse sand. In contrast, compared with the bare nZVI suspension and nZVI-laden foam, the spatial distribution of nZVI particles carried by SDS solution was significantly uniform along the column length. Third, the SDS concentration significantly influenced the migration of nZVI in porous media. The enhancement in the migration of nZVI carried by SDS solution was greater at an SDS dose of 0.25% compared with that at the other three doses (0.2%, 0.5%, and 1%) for sand with a 0.25 mm to 0.5 mm diameter. Increased SDS concentrations positively affected the transport of nZVI by foam for sand with a 0.25 mm to 0.5 mm diameter, and the SDS concentrations for enhancing the mobility of nZVI carried by SDS foam satisfied the following order: 1% > 0.5% > 0.25% > 0.2%. Thus, SDS solution and SDS foam were better vehicles than water for delivering nZVI particles to porous media for contamination remediation.


PMID: 25320851

DOI: 10.1080/10934529.2014.951214

Other references

Zhu, X.G.; Greeley, G.H.; Lewis, B.G.; Lilja, P.; Thompson, J.C., 1986: Blood-CSF barrier to CCK and effect of centrally administered bombesin on release of brain CCK. The purpose of this study, in part, was to determine the ability of cholecystokinin (CCK-33/39 and CCK-8) to penetrate the blood cerebrospinal fluid (CSF) barrier in dogs by measuring these forms of CCK in plasma and in CSF. In addition, the effec...

D.R.oij D.G.; Van Der Meer Y.; Van Pelt A.M.M.; Van Buul P.P.W., 1990: Correlation between proliferative activity of mouse spermatogonial stem cells and their sensitivity for cell killing and induction of reciprocal translocations by irradiation. Allen, J W , Et Al (Ed ) Banbury Report, Vol 34 Biology Of Mammalian Germ Cell Mutagenesis; Conference, Cold Spring Harbor, New York, Usa, November 12-15, 1989 Xviii+461p Cold Spring Harbor Laboratory Press: Cold Spring Harbor, New York, Usa Illus 35-50

Wang, S.; Bentley, W.; Liu, C.; Wang, M., 1999: The use of glucose to regulate pH values of culture media and increase the production of baculovirus (BmNPV) and foreign protein (HBsAg). When BmN-4 and M-BmN cells were grown in shake flasks, the pH initially dropped and later increased. The increase in pH signaled a ‘metabolic switch’ that was used here as an indicator for initiating a supplemental glucose and glutamin...

Rezendes, Allison, 2008: AVMF funds emergency preparedness in 2008. Journal of the American Veterinary Medical Association 232(1): 6

Weber, C.I.; Moore, D.R., 1967: Phytoplankton, seston, and dissolved organic carbon in the Little Miami River at Cincinnati, Ohio. A yearlong study was made of the phytoplankton, seston, and dissolved organic carbon in a small, hardwater, midwestern stream. The annual cycle of cell counts and volumes followed the cycle in water temperature. The dominant algae were small, eupl...

Vargas-Torres, S.Liliana.; Portari, E.Avvad.; Klumb, E.Mendes.; Guillobel, H.Carneiro.da.Rocha.; de Camargo, M.José.; Russomano, Fábio.Bastos.; Macedo, J.Maria.Brito., 2014: Association of CDKN2A polymorphisms with the severity of cervical neoplasia in a Brazilian population. Variants of p16(INK4a) and p14(ARF), encoded by the CDKN2A locus, may respond differently to the presence of human papillomavirus (HPV). We investigated the potential association of two CDKN2A polymorphisms, 500C > G (rs11515) and 540C &g...

Yin, Q.; Wu, C-Jun.; Yang, J.; Hang, C-Chen.; Li, C-Sheng., 2016: Effects of Shenfu Injection () on cerebral metabolism in a porcine model of cardiac arrest. To investigate the effects of Shenfu Injection (, SFI) on cerebral metabolism in a porcine model of cardiac arrest (CA). Thirty Wuzhishan minipigs were randomly assigned to the control group (n=6), epinephrine group (EP group, n=12) and Sfigroup (...

Wu, C.; Fry, C.H., 1997: The role of the L-type Ca-2+ channel in cholinergic pathways in guinea-pig detrusor smooth muscle. Journal of Physiology (Cambridge) 499P(0): 7P-8P

Sadowska-Bartosz, I.; Adamczyk-Sowa, M.; Galiniak, S.; Mucha, S.; Pierzchala, K.; Bartosz, G., 2014: Oxidative modification of serum proteins in multiple sclerosis. Multiple sclerosis (MS) has been demonstrated to involve oxidative stress and augmented glycoxidation. In this study, several markers of protein oxidative damage and glycoxidation have been compared in 14 relapsing remittent in MS (RRMS) patients...

Mora, P.; Fournier, D.; Narbonne, J.F., 1999: Cholinesterases from the marine mussels Mytilus galloprovincialis Lmk. and M. edulis L. from the freshwater bivalve Corbicula fluminea Müller. In order to improve the molecular basis for the use of bivalve cholinesterases as a reliable biomarker for aquatic pollution, the polymorphism and characterization of these enzymes in Mytilus edulis, Mytilus galloprovincialis and Corbicula flumine...