Characterization of Aqueous Organics by Specific Ultraviolet Absorbance and Octanol Water Partition Coefficient

Pradhan, Snigdhendubala; Kumar, Pradeep; Mehrotra, Indu

doi:10.1061/(asce)ee.1943-7870.0000787

Cited by 6 publications

(8 citation statements)

References 16 publications

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“…The slope of the plot between log K OW and SUVA max (Fig. 2 is 1.13 which, however, is less than the slope of 1.8 obtained for the plot between log K OW and SUVA max for aromatic compounds by Pradhan et al (2013). It, therefore, suggests that the behavior of a mixture is dominated by aromatic compounds more than the aliphatic compounds.…”

Section: Resultscontrasting

confidence: 48%

“…Another parameter that was discussed in an earlier study was the ratio of K OW to SUVA (Pradhan et al, 2013). It was demonstrated that the ratio of K OW to SUVA (K OW /SUVA max ) depends on the functional groups present in the organic compound.…”

Section: Resultsmentioning

confidence: 98%

“…The K OW and SUVA of these organics represent a wide range of variation (Table 2; Pradhan et al, 2013). An aqueous sample containing mixture of organics, the concentration of each organic may affect partitioning, therefore values of K OW and SUVA of samples containing same organics in three different ratios were determined at octanol to water ratio of 1:1, 1:2 and 2:1.…”

Section: Preparation Of Synthetic Samplesmentioning

confidence: 99%

“…K OW of synthetic samples containing mixture of organics and Hindon water samples was determined by shake-flask method at 25 • C followed by OECD (1981) and as described by Pradhan et al (2013). SUVA of corresponding samples was measured at max and 254 nm.…”

Section: Measurement Of K Ow and Suvamentioning

confidence: 99%

“…Pradhan et al (2013) established correlation between K OW and SUVA for carbohydrates, volatile fatty acids, alcohols and different aromatic compounds. This study also emphasized that SUVA at max was a better indicator of the nature of organics than SUVA at 254 nm.…”

Section: Introductionmentioning

confidence: 99%

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River pollution: Assessment of hydro-philic and phobic nature of persistent organic contaminants

Pradhan

Kumar

Mehrotra

2015

Environmental Nanotechnology, Monitoring & Management

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a b s t r a c tNatural purification of persistent organics by sorption during riverbank filtration (RBF) depends on their hydrophilic or hydrophobic nature. It can be ascertained by octanol/water partition coefficient (K OW ) and specific ultra violet absorbance (SUVA). This motivated the authors to analyze K OW and SUVA, firstly, of some mixed synthetic samples of organics and secondly, of polluted water samples from the River Hindon. Monthly water samples of the Hindon were collected from five locations (latitude 28 • 38 08.64 to 29 • 36 42.55 N and longitude 77 • 23 38.27 to 77 • 34 19.38 E) and were analyzed for cumulative waterquality parameters total organic carbon (TOC), UV-A, biochemical oxygen demand (BOD) and chemical oxygen demand (COD). The low ratio of BOD 5 -COD (∼0.13) is indicative of persistent nature of organics in the river water. Organics in the water samples were also analyzed by GC-MS and their log K OW values were obtained from the literature ranged from −0.84 to 2.15. Log K OW values of the water samples from four locations were between 0.11 and 0.37 but were around −0.43 at the fifth locations. Similarly, SUVA values of water from the same four locations were between 0.64 and 0.80 whereas the SUVA of the fifth water sample varied from 0.49 to 0.59. Both SUVA and K OW values reveal hydrophilic nature of the Hindon water samples.

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Section: Resultscontrasting

confidence: 48%

Section: Resultsmentioning

confidence: 98%

Section: Preparation Of Synthetic Samplesmentioning

confidence: 99%

Section: Measurement Of K Ow and Suvamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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