Adhesion of water-borne particulates on freshwater biota

Sansone, U.; Belli, M.; Riccardi, M.; Alonzi, Anna; Jeran, Zvonka; Jačimović, Radojko; Smodiš, Borut; Montanari, Emanuele; Cavolo, Fabio

doi:10.1016/s0048-9697(98)00235-6

Cited by 24 publications

(15 citation statements)

References 9 publications

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“…[12][13][14][15][16] The results indicated that the washing process using cold water was efficient for dirt removal. From the enrichment factors of Table 2 it is possible to observe that the mass fractions of terrigenous elements in the non-washed coffee powder were between 7 and 21 times higher than in the washed coffee.…”

Section: Instrumental Neutron Activation Analysis (Inaa)mentioning

confidence: 99%

Can impurities from soil-contaminated coffees reach the cup?

Tagliaferro

Fernandes

Bacchi

et al. 2007

J Radioanal Nucl Chem

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Depending on the harvest conditions, coffee beans can be contaminated by soil when dropped to the ground. It is well known that agricultural soils act as sinks for agrochemicals applied to the crops. While coffee is brewed, substances present in the roasted and ground coffee beans are extracted by hot water, emphasizing the need to assess the possible transfer of impurities from the soil to the beverage. Soil-contaminated samples of roasted coffee beans were split into 2 groups according to the treatments: (a) washed and ground and (b) only ground. Brewing was performed in a household espresso machine for both coffees. The resulting beverage was freeze-dried and the elemental composition determined by instrumental neutron activation analysis (INAA). The mass fractions of the terrigenous elements Fe, La, Sc, Sm and Th in the freeze-dried non-washed coffee beverages were, at least, 2 times higher than in the washed samples. These elements are tracers of the soil, indicating that the impurities from the soil reached the beverage.

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Section: Instrumental Neutron Activation Analysis (Inaa)mentioning

confidence: 99%

Can impurities from soil-contaminated coffees reach the cup?

Tagliaferro

Fernandes

Bacchi

et al. 2007

J Radioanal Nucl Chem

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“…Others, for example Sansone et al (1998), Battin et al (2003), and Salant et al (2011), have shown that periphyton captured or trapped fine particles by modifying shear stress and surface adhesion [20][21][22]. The lower OSS concentration (Figure 3c) in the artificial substrate mesocosms may in part reflect a lower phytoplankton biomass (Figure 4a).…”

Section: Discussionmentioning

confidence: 89%

“…In the morning of day 0 (5 October), 4,8,12,16,20,28, and 36 of the experiment, in situ turbidity was measured in each mesocosm at 20 cm water depth using a YSI 9500 Photometer (YSI, Inc., Yellow Springs, OH, USA). After that, a small (1 L) depth-integrated water sample was collected from each mesocosm using a tube sampler (8 cm diameter, 64 cm length).…”

Section: Sampling and Analytical Methodsmentioning

confidence: 99%

“…100 mg total phosphorus was bound per m 2 PP-fleece after four months of exposure [19]. Secondly, the periphyton canopy has the potential of retaining suspended solids in the water column via changes in flow hydraulics or direct particle trapping and adhesion [20][21][22][23]. For instance, Battin et al (2003) showed that some forms of photosynthetically active periphyton produce a 'sticky' exopolysaccharide (EPS) matrix that has been shown to enhance particle deposition [21].…”

Section: Introductionmentioning

confidence: 99%

“…Benthic algae may therefore benefit from enhanced light penetration via the removal of suspended particles. To date, the effects of exposed artificial substrate on nutrient removal and/or particle retention in lakes and rivers are well studied [16,17,[19][20][21][22], whereas the impact of the introduction of artificial substrate on the competition between pelagic and benthic primary production remains to be elucidated.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Exposed Artificial Substrate on the Competition between Phytoplankton and Benthic Algae: Implications for Shallow Lake Restoration

Luo

Jin

et al. 2017

Water

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Phytoplankton and benthic algae coexist in shallow lakes and the outcome of the competition between these two photoautotrophs can markedly influence water clarity. It is well established that exposed artificial substrate in eutrophic waters can remove nutrients and fine particles from the water column via the attached periphyton canopy. However, the effects of the introduction of artificial substrate on the competition between planktonic and benthic primary producers remain to be elucidated. We conducted a short-term outdoor mesocosm experiment to test the hypothesis that the nutrient and light changes induced by exposed artificial substrate (polythene nets) would benefit the benthic algae. Artificial substrate significantly reduced total nitrogen and phosphorus concentrations and water clarity improved, the latter due to the substrate-induced reduction of both organic and inorganic suspended solids. Consequently, as judged from changes in chlorophyll a (Chl-a) concentrations in water and sediment, respectively, exposed artificial substrate significantly reduced the phytoplankton biomass, while benthic algae biomass increased. Our results thus indicate that exposed artificial substrate may be used as a tool to re-establish benthic primary production in eutrophic shallow lakes after an external nutrient loading reduction, paving the way for a benthic-or a macrophyte-dominated system. Longer term and larger scale experiments are, however, needed before any firm conclusions can be drawn on this.

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Adsorptive Stripping Determination of Scandium(III) with Mordant Blue 9 on Silver Amalgam Film Electrode

Piech

2010

Electroanalysis

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A new adsorptive stripping voltammetric method for the determination of trace scandium(III) based on the adsorption of scandium(III)-mordant blue 9 complex on the cyclic renewable mercury film silver based electrode (Hg(Ag)FE) is presented. The effects of various factors such as: preconcentration potential and time, pulse height, step potential and supporting electrolyte composition are optimized. The calibration graph is linear from 2 nM (0.09 mg L À1 ) to 90 nM (4 mg L À1 ) for a preconcentration time of 45 s, with correlation coefficient of 0.9995. For a Hg(Ag)FE with a surface area of 7.9 mm 2 the detection limit for a preconcentration time of 90 s is as low as 5 ng L À1. The repeatability of the method at a concentration level of the analyte as low as 0.2 mg L À1, expressed as RSD is 1.9 % (n = 5). The proposed method was successfully applied and validated by studying the certified reference material (CRM 320 -river sediment) and natural samples with simultaneous recovery of Sc(III) from spiked water and sediment samples.

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Adhesion of water-borne particulates on freshwater biota

Cited by 24 publications

References 9 publications

Can impurities from soil-contaminated coffees reach the cup?

Can impurities from soil-contaminated coffees reach the cup?

Effects of Exposed Artificial Substrate on the Competition between Phytoplankton and Benthic Algae: Implications for Shallow Lake Restoration

Adsorptive Stripping Determination of Scandium(III) with Mordant Blue 9 on Silver Amalgam Film Electrode

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