Groundwater Chemicals Desk Reference

Montgomery, John H.

doi:10.1201/9781420009132

Cited by 138 publications

(63 citation statements)

References 84 publications

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“…[26] Using the relationship K d = ƒ oc × K oc , [131] this translates into an estimated log 10 K oc upper limit of <1.2 which agrees with our log 10 K oc estimates of 0.13 (SPARC K ow ), 0.24 (SPARC D octanol ), and -2.03 (ALOGPS). In a broader study of TFA sorption to 54 soils from North America and Europe, [132] log K oc values (calculated from the reported K d and ƒ om values using the formula K d = 0.58 × ƒ om × K oc [131] ) ranged from 0.25 to 1.77 (mean=median=1.12), in reasonable agreement with our SPARC K ow and D octanol estimates, the earlier work of van Dijk, [26] and field manipulation experiments in an experimental forest. [133] The ALOGPS approach appears to underestimate the K oc value for TFA.…”

supporting

confidence: 77%

Congener specific organic carbon normalized soil and sediment-water partitioning coefficients for the C1 through C8 perfluoroalkyl carboxylic and sulfonic acids

Rayne

Forest

2009

Nature Precedings

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Organic carbon normalized soil and sediment-water partitioning (K oc ) coefficients were estimated for all C 1 through C 8 perfluorinated alkylsulfonic acid (PFSA) and alkylcarboxylic acids (PFCA) congeners. The limited experimental K oc dataset for the straight chain C 7 through C 10 PFCAs and C 8 and increasing perfluoroalkyl chain length and linearity increase K oc values with substantial intra-and interhomologue variation and interhomologue mixing. Variability in K oc values among the PFCA and PFSA congeners will likely lead to an enrichment of more linear and longer chain isomers in organic matter fractions, resulting in aqueous phases fractionated towards shorter chain branched congeners. The expected magnitude of fractionation will require inclusion in source apportionment models and risk assessments. A comparison of representative established quantitative structure property relationships for estimated K oc values from octanol-water partitioning constants suggests that equilibrium partitioning frameworks may be applicable towards modeling PFCA and PFSA environmental fate processes and warrants further study using other partitioning coefficients for which suitable experimental data is available.

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supporting

confidence: 77%

Congener specific organic carbon normalized soil and sediment-water partitioning coefficients for the C1 through C8 perfluoroalkyl carboxylic and sulfonic acids

Rayne

Forest

2009

Nature Precedings

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“…There could be a slight rearrangement of the surfactant micelles with increasing pH, leading to slightly more sorption capacity for HOCs on the hydrophobic surfaces of Triton-X. Since acenaphthene has a very high pK a value (N15) (Montgomery, 2007), higher than the range of pH (4.0-10.0) considered in the current study, it is neutral within the pH range (Atkins and De Paula, 2002). …”

Section: Effect Of Ph On Simultaneous Removalmentioning

confidence: 86%

Simultaneous removal of PAHs and metal contaminants from water using magnetic nanoparticle adsorbents

Huang

Fulton

Keller

2016

Science of The Total Environment

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• Fast magnetic nanosorbents for simultaneous removal of PAHs and metals • Stable remediation performance across wide pH range (4-9) • High water hardness resistance across wide range of Ca 2 + or Mg 2 + concentration • Low energy use for regeneration of adsorbent and able to reuse multiple times Many industrial wastewaters are contaminated with both heavy metal ions and organic compounds, posing a major threat to public health and the environment. In this study, magnetic nanoparticle adsorbents, namely Mag-PCMA-T, which contain a maghemite core and a silica mesoporous layer that permanently confines surfactant micelles within the mesopores, were synthesized to achieve simultaneous removal of polycyclic aromatic hydrocarbons (PAHs) (1 mg/L) and metal contaminants (1 mg/L). The individual removal efficiency of Cd 2+ and acenaphthene using Mag-PCMA-T was evaluated under a range of initial ion concentrations and adsorbent dosages, as well as the competitive adsorption with Cd 2+ and acenaphthene simultaneously present. The isotherms and kinetics of Cd 2+ and acenaphthene sorption onto Mag-PCMA-T were determined. Mag-PCMA-T removed N85% of the acenaphthene in b30 min, with relatively high sorption capacity (up to 1060 mg/kg). Mag-PCMA-T also exhibited high sorption capacity for Cd 2+ (up to 2250 mg/kg). The simultaneous sorption performance was stable across a wide pH range (4-9) as well as in the presence of competitive metal ions (Ca 2+ and Mg 2+ ) or natural organic matters. The Mag-PCMA-T can be regenerated and reused, providing a sustainable, fast, convenient, and efficient approach for water treatment. b s t r a c t a r t i c l e i n f o© 2016 Published by Elsevier B.V. Contents lists available at ScienceDirectScience of the Total Environment

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“…Almost all samples for VOCs in the four shallow wells and all samples analyzed for heavy metals in the two sampled shallow wells were below detection limits. Only carbon disulfide, which can be found in some soil disinfectants, herbicides, and grain fumigants (Montgomery and Welkom, 1989), was detected at low concentrations in one well. The general absence of contaminants in groundwater near the nested wells indicates that few, if any, contaminants entered the groundwater system after flooding of homes and subsequent drawdown of the lake.…”

Section: Potential Groundwater Contamination From Flooding Of Residenmentioning

confidence: 96%

Hydrology and water quality of Shell Lake, Washburn County, Wisconsin, with special emphasis on the effects of diversion and changes in water level on the water quality of a shallow terminal lake

Juckem¹,

Robertson²

2013

Scientific Investigations Report

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Groundwater Chemicals Desk Reference

Cited by 138 publications

References 84 publications

Congener specific organic carbon normalized soil and sediment-water partitioning coefficients for the C1 through C8 perfluoroalkyl carboxylic and sulfonic acids

Congener specific organic carbon normalized soil and sediment-water partitioning coefficients for the C1 through C8 perfluoroalkyl carboxylic and sulfonic acids

Simultaneous removal of PAHs and metal contaminants from water using magnetic nanoparticle adsorbents

Hydrology and water quality of Shell Lake, Washburn County, Wisconsin, with special emphasis on the effects of diversion and changes in water level on the water quality of a shallow terminal lake

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