Combining reverse osmosis and electrodialysis for more complete recovery of dissolved organic matter from seawater

Vetter, Th.; Perdue, Edward M.; Ingall, Ellery D.; Koprivnjak, Jean-François; Pfromm, Peter H.

doi:10.1016/j.seppur.2007.04.012

Cited by 91 publications

(87 citation statements)

References 19 publications

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“…An alternative possibility is that these remaining anions such as SO 4 2À could have weaker abilities to compete with the sites in anion exchange membrane relative to Cl À and organic compounds (Mopper et al, 2007). The above observations are consistent with previous studies (Koprivnjak et al, 2006;Vetter et al, 2007;Gurtler et al, 2008). In the following RO and ED procedure, no significant loss of DOC was observed.…”

Section: Desalination By Cation Exchange Resins and Electrodialysissupporting

confidence: 90%

“…The yields >100% in a few samples could be attributed to the analysis errors of the DOC instrument. Analytical uncertainties were evident in low DOC concentrations (Vetter et al, 2007). The contamination from residual DOM in the RO system is another possibility for high yields (Vetter et al, 2007), which, however, could be impossible due to the thorough rinsing method in this investigation.…”

Section: The Role Of Concentration Factor In Dom Isolationmentioning

confidence: 77%

“…To solve this problem, cation exchange resin (CER) and electro-dialysis (ED) have been applied to remove dissolved ions from the DOM retentates. So far, the RO approach combined with CER and/or ED has successfully isolated DOM from ground, riverine and marine water (Koprivnjak et al, 2006;Serkiz and Perdue, 1990;Sun et al, 1995;Vetter et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Compositions and constituents of freshwater dissolved organic matter isolated by reverse osmosis

Huang

Ran

Mao

2014

Marine Pollution Bulletin

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a b s t r a c tDissolved organic matter (DOM) from riverine and lacustrine water was isolated using a reverse osmosis (RO) system. Solid-state 13 C nuclear magnetic resonance ( 13 C NMR) was used to quantitatively evaluate the compositions and constituents of DOM, which are compared with previous investigations on marine DOM. Results indicated that concentration factor (CF) was a key metric controlling yield and sorption of DOM on the RO system. The sorption was likely non-selective, based on the 13 C NMR and d 13 C analyses. Carbohydrates and lipids accounted for 25.0-41.5% and 30.2-46.3% of the identifiable DOM, followed by proteins (18.2-19.8%) and lignin (7.17-12.8%). The freshwater DOM contained much higher alkyl and aromatic C but lower alkoxyl and carboxyl C than marine DOM. The structural difference was not completely accounted for by using structure of high molecular weight (HMW) DOM, suggesting a size change involved in transformations of DOM during the transport from rivers to oceans.

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Section: Desalination By Cation Exchange Resins and Electrodialysissupporting

confidence: 90%

Section: The Role Of Concentration Factor In Dom Isolationmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

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Compositions and constituents of freshwater dissolved organic matter isolated by reverse osmosis

Huang

Ran

Mao

2014

Marine Pollution Bulletin

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“…Most of the technical details of the coupled RO/ED method and yields of DOM for a subset of the samples have been reported by Vetter et al (2007) and Gurtler et al (2008). This paper supplements those data with detailed information regarding sampling locations, removal of water and sea salts, and recovery of DOM for all remaining seawater samples.…”

Section: Introductionmentioning

confidence: 89%

“…Only five samples were collected at depths of more than 20 m, including an open ocean sample at 860 m, a Gulf Stream sample at 322 m, and three Gulf Stream samples at 77, 84, and 84 m, where the maximum level of chromophoric DOM (CDOM) was detected during sampling. Detailed procedures for collection of the seawater samples were described by Vetter et al (2007) and Gurtler et al (2008).…”

Section: Collection Of Seawater Samplesmentioning

confidence: 99%

Chemical and spectroscopic characterization of marine dissolved organic matter isolated using coupled reverse osmosis–electrodialysis

Koprivnjak

Pfromm

Ingall

et al. 2009

Geochimica et Cosmochimica Acta

100

117

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The coupled reverse osmosis-electrodialysis (RO/ED) method was used to isolate dissolved organic matter (DOM) from 16 seawater samples. The average yield of organic carbon was 75 ± 12%, which is consistently greater than the yields of organic carbon that have been commonly achieved using XAD resins, C 18 adsorbents, and cross-flow ultrafiltration. UV-visible absorbance spectra and molar C/N ratios of isolated samples were consistent with the corresponding properties of DOM in the original seawater samples, indicating that DOM samples can be isolated using the coupled RO/ED method without any bias for/against these two properties. Five of the samples were desalted sufficiently that reliable measurements of their 13 C and 1 H NMR spectra and their Fourier transform ion cyclotron resonance (FTICR) mass spectra could be obtained. The 13 C and 1 H NMR spectra of RO/ED samples differed distinctly from those of samples that have been isolated in much lower yields by other methods. In particular, RO/ED samples contained a relatively lower proportion of carbohydrate carbon and a relatively greater proportion of alkyl carbon than samples that have been isolated using cross-flow ultrafiltration. From the FTICR mass spectra of RO/ED samples, samples from the open ocean contained a much lower proportion of unsaturated compounds and a much higher proportion of fatty acids than coastal samples.

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Aged black carbon in marine sediments and sinking particles

Coppola

Ziolkowski

Masiello

et al. 2014

Geophys. Res. Lett.

103

174

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We report measurements of oceanic black carbon (BC) to determine the sources of BC to abyssal marine sediments in the northeast Pacific Ocean. We find that the average 14 C age of BC is older (by 6200 ± 2200 14 C years) than that of the concurrently deposited non-BC sedimentary organic carbon. We investigate sources of aged BC to sediments by measuring a sample of sinking particulate organic carbon (POC) and find that POC may provide the main transport mechanism of BC to sediments. We suggest that aged BC is incorporated into POC from a combination of resuspended sediments and sorption of ancient dissolved organic carbon BC onto POC. Our BC flux estimate represents~8-16% of the global burial flux of organic carbon to abyssal sediments and constitutes a minimum long-term removal estimate of 6-32% of biomass-derived BC using the present day emission flux.

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Combining reverse osmosis and electrodialysis for more complete recovery of dissolved organic matter from seawater

Cited by 91 publications

References 19 publications

Compositions and constituents of freshwater dissolved organic matter isolated by reverse osmosis

Compositions and constituents of freshwater dissolved organic matter isolated by reverse osmosis

Chemical and spectroscopic characterization of marine dissolved organic matter isolated using coupled reverse osmosis–electrodialysis

Aged black carbon in marine sediments and sinking particles

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