Predicting pollutant concentrations in the water column during dredging operations: Implications for sediment quality criteria

Wasserman, Julio César; Wasserman, Maria Angélica Vergara; Barrocas, Paulo Rubens Guimarães; Almeida, Aline Mansur

doi:10.1016/j.marpolbul.2016.05.005

Cited by 26 publications

(7 citation statements)

References 29 publications

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“…The loss of nursery services and of the jobs associated with fishing activities are the main consequences of dredging or damming. Wasserman et al (2016) asserted that the main concern for the interpretation of such impacts is the absence of studies using local hydrodynamics.…”

Section: Disruption Of Estuarine Ecoclines Caused By Human Modifications In Estuarine Morphologymentioning

confidence: 99%

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Barletta

Lima

2019

Front. Mar. Sci.

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Research on estuarine ecology in South America (SA) increased quali-quantitatively since the early 1980 in search of consistent recommendations for estuarine conservation. The most important ecological theory achieved is that the seasonal fluctuation of the salinity gradient creates an ecocline influenced by gradual changes between river-dominated to marine-like waters. Estuarine fish fauna adapts to these changeable abiotic characteristics, including the spatial, and seasonal bioavailability of dissolved oxygen and numerous pollutants. However, studies on the influence of the estuarine ecocline are still missing for key estuarine systems. This study provides an overview of fish ecology and anthropogenic impacts within estuarine systems of SA and discusses priorities for environmental conservation. Research on fish reached important conclusions regarding essential habitats and fish interaction with other biological and abiotic compartments over spatio-temporal settings, including conditions of severe anthropogenic impacts. These impacts are related to unplanned urban settlements, industrial estates, ports, damming of major rivers, dredging activities, and deforestation for extensive farming. Changes in estuarine morphology alter natural flows and lead to habitat losses, disrupting the ecocline and impairing fishes from moving among formerly connected habitats, especially earlier ontogenetic phases. In addition, industrial, urban, and farming activities often result in high loads of metals and persistent organic pollutants, organic enrichment and oxygen depletion. Moreover, plastic debris, a ubiquitous contaminant with sources on every human activity, including fishing, when fragmented into microplastics, become preferably concentrated in semi-enclosed environments, as estuaries. Metals, POPs and microplastics are actually asserted to be persistent. When in high concentrations, they become bioavailable to the estuarine trophic web through bioaccumulation, being biomagnified or biotransfered toward higher trophic level organisms, such as top predator fishes. Therefore, research on environmental quality and fish ecology must be based on robust sampling designs along the whole ecocline using long-term approaches. In addition, basic sanitation, co-management, an improved Barletta and Lima Ecology and Conservation of South American Estuaries licensing system and scientifically-based risk assessments/monitoring for all sorts of enterprise are also urgent. These conservation priorities need to be in place before human-driven changes surpass the ecosystem's capacity to produce resources and maintain services.

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Section: Disruption Of Estuarine Ecoclines Caused By Human Modifications In Estuarine Morphologymentioning

confidence: 99%

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Barletta

Lima

2019

Front. Mar. Sci.

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“…Other studies instead highlighted the effects that dredging activities have on the redistribution of contaminants, particularly heavy metals and bio-accumulation process on marine biota and molluscs (Rocha et al, 2016;Shefer et al, 2015). Given these various problems, methods are currently being devised to implement operations, based mainly on the study of current and hydrodynamics, which reduce environmental impact and limit the contamination of the water column during dredging (Wasserman et al, 2016). Alternative methods to conventional dredging are currently under development, aiming at a "remediation" of the sediments: some of them are based on resuspension techniques that eliminate small percentages of sediments instead of large quantities: through this operation only the finest particles are removed (known to adsorb the contamination more effectively) by blowing air (Mulligan et al, 2001).…”

Section: Dredging For the Beach Nourishmentmentioning

confidence: 99%

Dietary diisononylphthalate contamination induces hepatic stress: a multidisciplinary investigation in gilthead seabream (Sparus aurata) liver

et al. 2019

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IndexGeneral Introduction…………………………………………………………………………….p. 4 1. The coast: a delicate environment 2. The specific problems of the coastal environment: between society and environment 3. Characteristics of marine sediment 4. Source of pollution of marine sediment 5. Dredging activity 6. Chemistry versus Ecotoxicology 7. The regulatory framework (laws) 8. Molecular investigation Aims and organization of the thesis……………………………………………………………p. 21 Chapter 1. Chemical and ecotoxicological analysis of 21 sediments from harbour dredging activity…………………………………………………………………………………………...p. 23 Inorganic fractionCharacterized by clay and non-silicates, carbonates, iron and manganese oxides, phosphates and sulphides. Organic fractionConsisting of living organisms, xenobiotic compounds and natural organic substance, which is very variable and can consist of proteins, peptides, humic and fulvic material. Interstitial WaterWhich can be up to about 50% by volume. PollutantInorganic or organic. 23Chapter 1 Chemical and ecotoxicological analysis of 21 sediments from harbour dredging activity

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“…Overall, the detection methods, distribution, and environmental factors influencing the adsorption and the release processes of sediment P have been studied, which provides the methods for this present study. Other researchers have proposed additional methods, including in-situ remediation, dredging, and aeration to restore water environment, and contribute to the treatment of sediment [22,23]. However, the influence of water quality on sediment formation is debatable.…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution, Adsorption/Release Characteristics, and Environment Influence of Phosphorus on Sediment in Reservoir

Wang

Liu

et al. 2017

Water

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Sediment gradually accumulates at the bottom of reservoirs after decades of running. To explore the influences of sediments on the water quality of reservoirs, the spatial distribution, adsorption/release characteristics, and environment influence of sediment pollutants should be analyzed. In this paper, the spatial distributions of phosphorus (P) and P fractions in the Biliuhe reservoir (river valley reservoirs) sediments were investigated. The adsorption and release characteristics of sediments P were studied in the experiment, while its environmental influence was analyzed too. The results indicate that the concentration of P in sediments was higher at the dam and the Zhongling site, while lower at other entrances of the reservoir and the smallest in the water-level fluctuating zone. Total Phosphorus (TP) varied from 355.46 to 764.57 mg/kg. Inorganic Phosphorus (IP) was the main form of TP in sediments, making up a proportion of 56-75%, while the correlation coefficient of P bound to Al, Fe, and Mn oxides was 0.922. Hydroxide (Fe/Al-P) was the main form of IP, which accounted for 46-83% with a correlation coefficient of 0.888. The maximum adsorption capacity calculated by Langmuir model was between 714.29 and 3333.33 mg/kg. The adsorption efficiency obtained by the Freundlich model was within the range of 0.40-1.42, which indicated that P adsorption was more difficult in the water-level fluctuating zone. The critical adsorption and release concentration range was 0.1-0.2 mg/L for the majority of the sampling points. The amount of P released in 24 h (the initial concentration of TP in the overlying water was 0 mg/L) accounted for 1.15-4.16% of TP in sediments, which was higher than the average concentration in the reservoir. It is concluded that the sediment is the potential pollution source. The relationship between the change of environmental factors and the release of sediment contaminants should be considered in the future.

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Predicting pollutant concentrations in the water column during dredging operations: Implications for sediment quality criteria

Cited by 26 publications

References 29 publications

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Dietary diisononylphthalate contamination induces hepatic stress: a multidisciplinary investigation in gilthead seabream (Sparus aurata) liver

Spatial Distribution, Adsorption/Release Characteristics, and Environment Influence of Phosphorus on Sediment in Reservoir

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