Surface properties of suspended solids in stratified estuaries (Krka River estuary and Rhône River delta)

Bišćan, Jasenka; Rhebergen, I.; Juračić, Mladen; Martin, Jean‐Marie; Mouchel, Jean-Marie

doi:10.1016/0304-4203(91)90041-t

Cited by 13 publications

(7 citation statements)

References 15 publications

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“…Indeed, the results displayed in Figure 2a show an increase in the amount of TOC with decreasing particle size (sampling station S3). The strong affinity of the OM for finer particles was already established (Bišćan et al, 1991;Buffle and Leppard, 1995). This results in their strong association and greater resistance to chemical treatments (Kahle et al, 2003;Mikutta et al, 2005b).…”

Section: Granulometric Characteristics Of the Investigated Sedimentsmentioning

confidence: 98%

“…The OM significantly affects physicochemical properties (SSA and CEC) of mineral surfaces (Bišćan et al, 1991;Boldrin et al, 1992;Kleber et al, 2004;Ransom et al, 1998;Zhuang and Yu, 2002). The extent of modification can be estimated through changes of these properties following the OM removal from mineral surfaces.…”

Section: Influence Of Om On the Surface Physicochemical Properties Of The Investigated Sedimentsmentioning

confidence: 99%

“…However, contrary results were also reported Jurina et al, 2015;Vdović and Juračić, 1993). The influence of OM on the surface physicochemical properties of mineral particles is complex and depends on the type of OM, marine vs. terrigenous (Bišćan et al, 1991), and the character of the underlying clay mineral surfaces (Zhuang and Yu, 2002). According to Bišćan et al (1991), the impact of OM on the reactivity of mineral particles depends on the molecular weight and the porosity of the OM.…”

Section: Influence Of Om On the Surface Physicochemical Properties Of The Investigated Sedimentsmentioning

confidence: 99%

“…These properties are used to describe physicochemical reactions occurring at the surfaces of mineral particles (Bišćan et al, 1991;Breiner et al, 2006;Zhuang and Yu, 2002) and are considered of great importance in different biogeochemical processes.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies carried out in the Adriatic region have provided information on the primary sedimentological and mineralogical properties of recent sediments (Boldrin et al, 1992;Faganeli et al, 1994;Matijević et al, 2008;Pigorini, 1968;Pikelj et al, 2016;Ravaioli et al, 2003;Sondi and Juračić, 2010;Spagnoli et al, 2014;Tomadin, 2000a), their surface physicochemical properties (Bišćan et al, 1991;Boldrin et al, 1992;Vdović et al, 1991) and their geochemical features (De Lazzari et al, 2004;Dolenec et al, 1998;Goudeau et al, 2013;Spagnoli et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Size-related mineralogical and surface physicochemical properties of the mineral particles from the recent sediments of the Eastern Adriatic Sea

et al. 2020

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Section: Granulometric Characteristics Of the Investigated Sedimentsmentioning

confidence: 98%

Section: Influence Of Om On the Surface Physicochemical Properties Of The Investigated Sedimentsmentioning

confidence: 99%

Section: Influence Of Om On the Surface Physicochemical Properties Of The Investigated Sedimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Size-related mineralogical and surface physicochemical properties of the mineral particles from the recent sediments of the Eastern Adriatic Sea

et al. 2020

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Sorption of Chlorophenolates in Soils and Aquifer and Marine Sediments

Fingler

Drevenkar

Fröbe

2004

Arch Environ Contam Toxicol

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This article describes the sorption behavior of 3 hydrophobic ionizable chlorophenols-2,4,6-trichlorophenol, 2,3,4,6-tetrachlorophenol, and pentachlorophenol-in different types of natural sorbents. A series of experiments was carried out with 11 topsoil samples, 9 aquifer sediments, and 12 marine sediments differing in pH, organic-matter content, and mineral composition and presumably also in type of organic matter due to their differing origins. Ionized forms of chlorophenols dominated in almost all sorption experiments. Freundlich isotherm coefficients K(f) and 1/n, as well as organic-matter sorption coefficient (log K(om)) and free-energy change (DeltaG(o)), were calculated for all 3 compounds in all sorbents. The sorption intensity of predominantly ionized chlorophenols increased linearly with the increase of sorbent organic-matter content and decreased with the increasing sorbent pH. Different sorption behavior of all 3 compounds in marine sediments with respect to topsoils and aquifer sediments was indicated by significant differences in K(f) and 1/n coefficients as well as in log K(om) and DeltaG(o) values. The highest K(f) and log K(om) values were obtained for sorption of chlorophenolic compounds in topsoils and the lowest in marine sediments, although both groups of sorbents had similar organic-matter content. The 1/n coefficient, reflecting the isotherm nonlinearity, was considerably lower than unity for all compounds in almost all sorbents. The most significant deviation of sorption isotherms from linearity was observed in marine sediments. Only marine sediments showed a linear increase in sorption intensity of all 3 compounds with the increase in sorbent-specific surface area. These results pointed to a different mechanism of sorption in marine and terrestrial sorbents and confirmed that the capacity of sorption was related to amount as well as type and origin of organic matter.

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Occurrence of organic colloids in the stratified estuary of the Krka River (Croatia)

Sempéré¹,

Cauwet²

1995

Estuarine, Coastal and Shelf Science

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Along a vertical profile of a stratified estuary, we determined organic carbon in the following fractions: low molecular weight (LMW-OC<0-02 gin), colloidal (0-02 gm0.7 gm). The results showed abundant concentrations of organic colloids accounting for: 40% of total organic carbon (TOC) in the overlying brackish water (salinity 2), 22% in the underlying marine water (salinity 38) and 19% (+ 5 %) for intermediate salinity samples (salinity 3-31). Upon contact with seawater (in the salinity range 2-5) both DOC and COC concentrations decreased drastically (44 and 47 ]aM respectively), whereas POC slightly increased (I 1 gM), being consistent with previous laboratory and field studies, and indicating that at low salinities, the colloidal fraction is actively involved in the DOC physicochemical aggregation. In the halocline, we observed that organic colloids and relatively degraded particles accumulated together in the lowest part of the interface (salinity 31). Because previous studies in the same area have shown accumulation of degraded cells and fragments in the bottom of the halocline, we suggest that large colloids (COC in this study) at the interface probably originated from fragmentation of non-living organisms or aggregates. Furthermore, it is likely that these processes which are enhanced in a highly stratified estuary, are partly responsible for the DOC non-conservative dilution observed along this profile.

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Surface properties of suspended solids in stratified estuaries (Krka River estuary and Rhône River delta)

Cited by 13 publications

References 15 publications

Size-related mineralogical and surface physicochemical properties of the mineral particles from the recent sediments of the Eastern Adriatic Sea

Size-related mineralogical and surface physicochemical properties of the mineral particles from the recent sediments of the Eastern Adriatic Sea

Sorption of Chlorophenolates in Soils and Aquifer and Marine Sediments

Occurrence of organic colloids in the stratified estuary of the Krka River (Croatia)

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