Adsorption of Phenanthrene and Bisphenol A on Organo-Nano Iron Oxide Complexes

2013 ◽  
Vol 864-867 ◽  
pp. 1793-1797 ◽  
Author(s):  
Ni Liang ◽  
Di Zhang ◽  
Min Wu
Keyword(s):  
Organic Matter ◽  
Iron Oxide ◽  
Humic Acid ◽  
Bisphenol A ◽  
Fumaric Acid ◽  
Organic Contaminants ◽  
Hydrophobic Interactions ◽  
Model Compounds ◽  
Hydrophobic Organic Contaminants ◽  
Organomineral Complexes

Organo-mineral complexes are important in regulating the transport and retention of hydrophobic organic contaminants in soils/sediments. Humic acid will be fractionated during adsorption on mineral. This study examined the sorption of model compounds with different properties (tannin acid, gallic acid, fumaric acid sodium and sodium oleate) on nanoiron oxide minerals and determined the sorption of phenanthrene and Bisphenol A on these organooxide complexes. The results showed that the sorption of model compounds on nanoFe2O3 followed the order of O > T > G> F. The higher adsorption of O and T was likely attributed to their higher molecule weight. The sorption of PHE and BPA on organomineral complexes was controlled by hydrophobic interactions. HOCs will adsorb preferentially on hydrophobic aliphatic compositions of organic matter.

Comparative Adsorption of Phenanthrene, Bisphenol A, and Sulfamethoxazole on Humic Acid-Iron Oxide Nanoparticle Complexes

2015 ◽  
Vol 32 (8) ◽  
pp. 703-712 ◽  
Author(s):  
Ni Liang ◽  
Di Zhang ◽  
Chaoxian Wei ◽  
Hao Li ◽  
Saikat Ghosh ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Humic Acid ◽  
Bisphenol A ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticle

The Role of Condensed Organic Matter in the Nonlinear Sorption of Hydrophobic Organic Contaminants by a Peat and Sediments

2002 ◽  
Vol 31 (6) ◽  
pp. 1953-1962 ◽  
Author(s):  
Yong Ran ◽  
Weilin Huang ◽  
P. S. C. Rao ◽  
Dehan Liu ◽  
Guoying Sheng ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Contaminants ◽  
Hydrophobic Organic Contaminants ◽  
Nonlinear Sorption

Influences of TiO2 Nanoparticles on the Transport of Hydrophobic Organic Contaminant in Soil

2014 ◽  
Vol 1010-1012 ◽  
pp. 55-68
Author(s):  
Ou Chen Cai
Keyword(s):  
Porous Media ◽  
Organic Matter ◽  
Contaminant Transport ◽  
Organic Contaminants ◽  
Organic Contaminant ◽  
Wastewater Sludge ◽  
Titania Nanoparticles ◽  
Hydrophobic Organic Contaminants ◽  
Transport In Porous Media ◽  
Subsurface Environment

As nanotechnologies become more widely used, titania nanoparticles are being released to the subsurface environment via wastewater sludge applications. Titania nanoparticles are not only toxic to organisms in the environment, but recent studies revealed that they may also serve as carriers of hydrophobic organic contaminants and affect their fate and distribution in the subsurface environment. The mobility of titania nanoparticles varies depending on nanoparticle morphology characteristics, pH and the ionic strength of solutions, flow velocity, nanoparticle concentration, and the presence of surfactant or natural organic matter. Analogous to findings for natural and engineered carbonaceous nanoparticles, titania nanoparticles may enhance the transport of hydrophobic organic contaminants in porous media. However, to prove this hypothesis, further research is necessary. Thus experiments examining the impacts of titania nanoparticle on the hydrophobic organic matter transport in porous media were designed, which consist of three different sets of column experiments. These experimental sets will investigate the effects of the presence of titania nanoparticles, the size of nanoparticles and the organic carbon content in soil, respectively. Due to the estimation of the potential for the titania nanoparticles to facilitate organic contaminant transport, the experiment results are expected as: (a) the presence of titania nanoparticles will enhance the organic contaminant transport in porous media; (b) smaller nanoparticles will adsorb more organic contaminants and enhance their transport as the result of the increasing specific surface area; (c) soil containing higher organic matter content will compete for the adsorption of organic contaminants and retard their facilitated transport by titania nanoparticles.

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