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Effect of model dissolved organic matter coating on sorption of phenanthrene by TiO2 nanoparticles.

Effect of model dissolved organic matter coating on sorption of phenanthrene by TiO2 nanoparticles.

Environmental pollution (Barking, Essex : 1987) (2014-08-05)

Xilong Wang, Enxing Ma, Xiaofang Shen, Xiaoying Guo, Meng Zhang, Haiyun Zhang, Ye Liu, Fei Cai, Shu Tao, Baoshan Xing

摘要

Dissolved organic matter (DOM) may alter the sorption of hydrophobic organic contaminants (HOC) to metal oxide nanoparticles (NPs), but the role of DOM and NP types is poorly understood. Here, phenanthrene sorption was quantified on four types of nano-TiO2 (three rutile, one anatase), and a bulk, raw TiO2 powder. Prior to the sorption experiments, these nanoparticles were coated using four different organic materials: Lignin (LIG), tannic acid (TAN), Congo red (CON), and capsorubin (CAP). Lignin, tannic acid, congo red and capsorubin coating substantially enhanced phenanthrene sorption to various TiO2 particles. After coating with a specific DOM, Kd values by the DOM-coated TiO2 particles on percent organic carbon content and surface area (SA) basis (Koc/SA) generally followed the order: TiO2 NPs with hydrophobic surfaces > bulk TiO2 particles > other TiO2 NPs. Different Koc/SA values of various DOM-TiO2 complexes resulted from distinct conformation of the coated DOM and aggregation.

材料

产品编号

品牌

产品描述

Sigma-Aldrich

菲, 98%

Sigma-Aldrich

菲, sublimed grade, ≥99.5%

Supelco

菲, analytical standard, for environmental analysis

钛, mesh, 100x100mm, nominal aperture 0.19mm, wire diameter 0.23mm, 60x60 wires/inch, open area 20%, twill weave

Sigma-Aldrich

钛, wire, diam. 0.25 mm, 99.7% trace metals basis

钛, mesh, 100x100mm, nominal aperture 4.3mm, wire diameter 1.5mm, 4.4x4.4 wires/inch, open area 94%, platinized diamond mesh

Supelco

菲, certified reference material, TraceCERT^®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland

Sigma-Aldrich

钛, foil, thickness 2.0 mm, 99.7% trace metals basis

钛, rod, 10mm, diameter 50mm, 99.99+%

钛, rod, 25mm, diameter 50mm, 99.99+%

Sigma-Aldrich

钛, wire, diam. 0.5 mm, 99.99% trace metals basis

钛, wire, straight, 1000mm, diameter 1.0mm, as drawn, 99.6+%

钛, tube, 200mm, outside diameter 2.03mm, inside diameter 1.55mm, wall thickness 0.24mm, annealed, 99.6+%

钛, wire reel, 25m, diameter 0.20mm, annealed, 99.6+%

钛, wire reel, 2m, diameter 1.0mm, as drawn, 99.99+%

钛, rod, 200mm, diameter 2mm, as drawn, 99.99+%

钛, wire reel, 0.5m, diameter 0.25mm, as drawn, 99.99+%

钛, rod, 1000mm, diameter 2mm, annealed, 99.6+%

钛, rod, 1000mm, diameter 1.5mm, annealed, 99.6+%

钛, tube, 500mm, outside diameter 9.5mm, inside diameter 8.2mm, wall thickness 0.65mm, annealed, 99.6+%

钛, rod, 100mm, diameter 2mm, annealed, 99.6+%

钛, tube, 100mm, outside diameter 3.0mm, inside diameter 1.5mm, wall thickness 0.75mm, annealed, 99.6+%

钛, wire reel, 1m, diameter 0.5mm, as drawn, 99.99+%

钛, rod, 500mm, diameter 5mm, annealed, 99.6+%

钛, wire reel, 1m, diameter 0.25mm, as drawn, 99.6+%

钛, tube, 1000mm, outside diameter 10mm, inside diameter 8mm, wall thickness 1.0mm, annealed, 99.6+%

钛, rod, 100mm, diameter 30mm, annealed, 99.6+%

钛, wire reel, 1m, diameter 0.25mm, annealed, 99.6+%

钛, rod, 100mm, diameter 10mm, annealed, 99.6+%

钛, rod, 100mm, diameter 5mm, annealed, 99.6+%