Sorption of phenanthrene by nanosized alumina coated with sequentially extracted humic acids

Yang, Kun; Zhu, Lizhong; Xing, Baoshan

doi:10.1007/s11356-009-0163-z

Cited by 38 publications

(27 citation statements)

References 31 publications

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“…S1. The aromaticity of HA fraction decreased with increasing extraction, since the later extracted HA fraction had lower C/H ratio and SUVA 254 values which can identify the abundance of aromatic carbon of the HA fractions (Weishaar et al, 2003;Yang et al, 2010;Baken et al, 2011). The calculated aromaticity of HAA, HAB, HAC and HAD were 54%, 45%, 39% and 33%, respectively (Table S1).…”

Section: Characteristics Of Ha Fractionsmentioning

confidence: 96%

“…The polarity of HA fraction, defined as atomic ratio of (N + O)/C (Xing et al, 1994), also decreased from 0.49 for HAA to 0.38 for HAD (Table 1). However, the aliphaticity of HA fraction increased with increasing extraction, indicated by the lower O/C and (N + O)/C ratios in the later extracted HA fraction (Yang et al, 2010). The calculated aliphaticity of HAA, HAB, HAC and HAD were 46%, 55%, 61% and 67%, respectively (Table S1).…”

Section: Characteristics Of Ha Fractionsmentioning

confidence: 99%

“…Four HA fractions (HAA, HAB, HAC and HAD) were sequentially extracted from a natural sediment collected from Dianchi Lake (Yunnan, China), using the method described in our previous studies (Yang and Xing, 2009;Yang et al, 2010) and also in the Supplementary Material. HAA was the first extracted HA fraction, while HAB, HAC and HAD were the mixtures of second to third, fourth to sixth, and seventh to twelfth extracted HA fractions, respectively.…”

Section: Ha Fractions and Characterizationmentioning

confidence: 99%

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Sorption of Cu2+ on humic acids sequentially extracted from a sediment

Yang

Miao

et al. 2015

Chemosphere

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Section: Characteristics Of Ha Fractionsmentioning

confidence: 96%

Section: Characteristics Of Ha Fractionsmentioning

confidence: 99%

Section: Ha Fractions and Characterizationmentioning

confidence: 99%

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Sorption of Cu2+ on humic acids sequentially extracted from a sediment

Yang

Miao

et al. 2015

Chemosphere

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“…After soils were contaminated by landfill leachate, certain functional groups of DOM could form complex with clay minerals owing to the fine particle size, favorable microspores, and high sorption capacity [8,9]. Thus, interactions of DOM from landfill leachate with clays could affect significantly the fate and reactivity of organic pollutants in soils [9,10], such as HOCs. Besides, one of the traditional liners is geosynthetic clay liners (GCLs), consisting primarily of nature clays or processed clays [11].…”

Section: Introductionmentioning

confidence: 99%

“…Yang et al also suggested that humic acids adsorption by nano-Al 2 O 3 could be basically explained with a ligand exchange mechanism because of the protonated OH 2 + groups on the Al 2 O 3 surface [10]. Besides, many works about pyrene sorption studies have been reported.…”

Section: Introductionmentioning

confidence: 99%

Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill Leachate

Wen

Xiang

et al. 2015

Journal of Chemistry

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Interactions of dissolved organic matter (DOM) from landfill leachate with clays could affect significantly the fate of hydrophobic organic compounds (HOCs) in soils. The complexes of montmorillonite (MT) and kaolinite (KL) with DOM extracted from landfill leachate were prepared under controlled conditions, termed CMT and CKL, respectively. The bare clays and their complexes were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermogravimetry (TG), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). Batch experiments were designed to investigate the sorption behavior of pyrene onto the clays in the presence of DOM. The maximum sorption capacities of pyrene on MT, CMT, KL, and CKL were 22.18, 38.96, 42.00, and 44.99 g⋅g −1 , respectively, at the initial concentration of 1000 ± 150 g⋅L −1 . The sorption isotherms of pyrene by the bare clays followed the Henry model well, whereas the Freundlich sorption isotherm provided a better fit to the equilibrium data of the sorption by the complexes. The role of montmorillonite and kaolinite complexes with DOM in the retention of pyrene in soils was different. This may be due to the different crystal structures between montmorillonite and kaolinite.

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Influence of carbon and metal oxide nanomaterials on aqueous concentrations of the munition constituents cyclotrimethylenetrinitramine (RDX) and tungsten

Brame

Kennedy

Lounds³

et al. 2014

Enviro Toxic and Chemistry

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There is an increasing likelihood of interactions between nanomaterials and munitions constituents in the environment resulting from the use of nanomaterials as additives to energetic formulations and potential contact in waste streams from production facilities and runoff from training ranges. The purpose of the present research was to determine the ability of nano-aluminum oxide (Al(2)O(3)) and multiwalled carbon nanotubes (MWCNTs) to adsorb the munitions constituents cyclotrimethylenetrinitramine (RDX) and tungsten (W) from aqueous solution as a first step in determining the long-term exposure, transport, and bioavailability implications of such interactions. The results indicate significant adsorption of RDX by MWCNTs and of W by nano-Al(2)O(3) (but not between W and MWCNT or RDX and nano-Al(2)O(3)). Kinetic sorption and desorption investigations indicated that the most sorption occurs nearly instantaneously (<5 min), with a relatively slower, secondary binding leading to statistically significant but relatively smaller increases in adsorption over 30 d. The RDX sorption that occurred during the initial interaction was irreversible, with long-term, reversible sorption likely the result of a secondary interaction; as interaction time increased, however, the portion of W irreversibly sorbed onto nano-Al(2)O(3) also increased. The present study shows that strong interactions between some munitions constituents and nanomaterials following environmental release are likely. Time-dependent binding has implications for the bioavailability, migration, transport, and fate of munitions constituents in the environment.

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Sorption of phenanthrene by nanosized alumina coated with sequentially extracted humic acids

Cited by 38 publications

References 31 publications

Sorption of Cu2+ on humic acids sequentially extracted from a sediment

Sorption of Cu2+ on humic acids sequentially extracted from a sediment

Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill Leachate

Influence of carbon and metal oxide nanomaterials on aqueous concentrations of the munition constituents cyclotrimethylenetrinitramine (RDX) and tungsten

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