Characterization of natural organic matter from Mediterranean coastal seawater

Penru, Y.; Simon, F. Xavier; Guastalli, Andrea R.; Esplugas, Santiago; Llorens, Joan; Baig, Sylvie

doi:10.2166/aqua.2013.113

Cited by 36 publications

(23 citation statements)

References 38 publications

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“…Furthermore, the values of SUVA 254 < 1 reveal the lower hydrophobic character of NOM (Edzwald and Tobiason, 1999). These results are consistent with those previously obtained by Penru et al (2011). However, although most NOM observed in seawater is resistant to microbial oxidation (Ogawa et al, 2001), the biological filtration with EBCTs from values as low as 5.7 to 11.3 min allows the removal of DOC, A 254 and BOD 7 ranging from 4 to 15%.…”

Section: Membrane Fractionationsupporting

confidence: 90%

“…Building blocks were better removed than humic substances (21% and 9%, respectively), which was most likely because of their lower complexity and greater hydrophilicity (Huck, 1999;Baghoth et al, 2008;Penru et al, 2011). For biopolymers with high molecular weights, the concentration of 64 µg C L -1 in seawater was reduced to 53 µg C L -1 by the biofilter.…”

Section: Evolution Of Lc-ocd In the Biofiltration Processmentioning

confidence: 99%

“…The LC-OCD reveals that seawater has a low content of organic matter that is primarily composed of LMW neutrals, humic substances and building blocks, which represent approximately 90% of the total DOC (Baghoth et al, 2008;Penru et al, 2011;Simon et al, 2012). All fractions, except the LMW acids, were removed to some extent by the biofiltration process ( Figure 6).…”

Section: Evolution Of Lc-ocd In the Biofiltration Processmentioning

confidence: 99%

“…Consequently, microorganisms start growing at the expense of dissolved NOM and can develop a biofilm that can cause operational problems (Flemming, 1997;Matin et al, 2011;Griebe and Flemming, 1998;Flemming et al, 1998;Hu et al, 2005). Even with the low and mostly non-biodegradable seawater NOM (Volk et al, 1997;Penru et al, 2011), marine microorganisms are metabolically active (Egli, 2010). In SWRO plants the consequences of fouling include an increase of the membrane resistance coupled with a decrease in water production and water quality.…”

Section: Introductionmentioning

confidence: 99%

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Study on the removal of biodegradable NOM from seawater using biofiltration

et al. 2013

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Despite the low biodegradability of seawater NOM, problems associated with biofouling are common in facilities that handle seawater. In this work, a fixed-film aerobic biofilter is proposed as an effective unit for preventing biofouling in such facilities.A packed-bed biofilter with an EBCT = 6 -11 min was employed. The results demonstrated that the DOC is reduced by 6% and the BOD 7 is reduced up to 15%.The LC-OCD analysis revealed that biofiltration abates the LMW neutrals and biopolymer fractions by 33 and 17%, respectively. However, the fractionation with UF membrane showed that the biofiltration process is able to degrade the more biodegradable compounds that have molecular weights that are greater than 1 kDa and compounds with molecular weights of less than 1 kDa.After biofiltration, the biological activity measured in terms of ATP removal was reduced by 60%. Finally, a test to evaluate the biofilm formation capacity of a water sample revealed reductions of ~94% when comparing biofiltered and non-biofiltered seawater. Therefore, a fixed-film aerobic biofiltration process could be a useful treatment for the removal of biodegradable organic matter from seawater and for improving the water quality in terms of less biofilm formation capacity.* To whom correspondence should be addressed.

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Section: Membrane Fractionationsupporting

confidence: 90%

Section: Evolution Of Lc-ocd In the Biofiltration Processmentioning

confidence: 99%

Section: Evolution Of Lc-ocd In the Biofiltration Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on the removal of biodegradable NOM from seawater using biofiltration

et al. 2013

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“…More details on seawater characterization and analyses are given elsewhere (Simon et al, 2011;Simon et al, 2013;Penru et al, 2013).…”

Section: Tablementioning

confidence: 99%

Study of Seawater Biofiltration by Measuring Adenosine Triphosphate (ATP) and Turbidity

Simon

Rudé

Llorens

et al. 2013

Water Air Soil Pollut

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In the present study, we examined seawater biofiltration in terms of adenosine triphosphate (ATP) and turbidity. A pilot biofilter continuously fed with fresh seawater reduced both turbidity and biological activity measured by ATP.Experiments operated with an empty bed contact time (EBCT) of between 2 and 14 min resulted in cellular ATP removals of 32% to 60% and turbidity removals of 38% to 75%. Analysis of the water from backwashing the biofilter revealed that the first half of the biofilter concentrated around 80% of the active biomass and colloidal material that produces turbidity. By reducing the EBCT, the biological activity moved from the first part of the biofilter to the end. Balances of cellular ATP and turbidity between consecutive backwashings indicated that the biological activity generated in the biofilter represented more than 90% of the detached cellular ATP. In contrast, the trapped ATP was less than 10% of the overall cellular ATP detached during the backwashing process. Furthermore, the biological activity generated in the biofilter seemed to be more dependent on the elapsed time than the volume filtered. In contrast, the turbidity trapped in the biofilter was proportional to the volume filtered, although a slightly higher amount of turbidity was found in the backwashing water; this was probably due to attrition of the bed medium. Finally, no correlations were found between turbidity and ATP, indicating that the two parameters focus on different matter. This suggests that turbidity should not be used as an alternative to cellular concentration.

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Relationship changes between CDOM and DOC in the Songhua River affected by highly polluted tributary, Northeast China

Zhao

Song

et al. 2018

Environ Sci Pollut Res

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In this study, the dissolved organic carbon (DOC) concentrations, chromophoric dissolved organic matter (CDOM) absorption coefficient a(254), and excitation-emission matrix fluorescence (EEM) were examined in the Songhua River (SHR) and its highly polluted tributary of Northeast China. Fluorescence regional integration (FRI) was used to identify five fluorescent regions: one tyrosine-like (R1), one tryptophan-like (R2), one fulvic-like (R3), one microbial by-product-like (R4), and one humic-like (R5) regions. The five EEM-FRI regions for all water samples have site-specific properties. Principle component analysis (PCA) was conducted to assess variations in the five FRI regions and the humification index (HIX) for all water samples. For the water samples from the mainstream of SHR, CDOM absorption coefficient a(254) was correlated with either DOC or FRI fluorescent regions (R3 and R5), respectively. FRI R3 region was also correlated with R5 region for the water samples in the mainstream of SHR. However, the determination coefficients (R) and slopes of these relationships among CDOM absorption, fluorescent regions, and DOC all decreased when the SHR waters were influenced by the highly polluted tributary of Yinma River (YMR) and Yitong River (YTR), which has a negative effect on the estimation of DOC flux transported by the SHR to oceans.

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Characterization of natural organic matter from Mediterranean coastal seawater

Cited by 36 publications

References 38 publications

Study on the removal of biodegradable NOM from seawater using biofiltration

Study on the removal of biodegradable NOM from seawater using biofiltration

Study of Seawater Biofiltration by Measuring Adenosine Triphosphate (ATP) and Turbidity

Relationship changes between CDOM and DOC in the Songhua River affected by highly polluted tributary, Northeast China

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