Chemical and ecotoxicological analyses of sediments and elutriates of contaminated rivers due to e-waste recycling activities using a diverse battery of bioassays
Croucher Institute for Environmental Sciences, and Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China. Environmental Pollution
(Impact Factor: 4.14).
03/2009; 157(7):2082-90. DOI: 10.1016/j.envpol.2009.02.015
A multi-trophic, multi-exposure phase assessment approach was applied to characterize the toxicity of sediments collected from two rivers in Guiyu, China, an e-waste recycling centre. Elutriate toxicity tests (bacterium Vibrio fischeri and microalga Selenastrum capricornutum) and whole sediment toxicity test (crustacean Heterocypris incongruens) showed that most sediments exhibited acute toxicity, due to elevated heavy metals and PAHs levels, and low pH caused by uncontrolled acid discharge. The survival rates of crustaceans were negatively (p < 0.05) correlated with total PAHs in sediments (411-1755 mg kg(-1)); EC50s of V. fischeri on the elutriates were significantly correlated with elutriate pH (p < 0.01). Significant (p < 0.05) correlations between the induction of hepatic metallothionein in tilapia (Oreochromis mossambicus) and metal concentrations (Cu, Zn, Pb) in sediments were also observed, when fish were fed with diets containing sediment. The results showed that uncontrolled e-waste recycling activities may bring adverse effects to local aquatic ecosystem.
Available from: Guido Persoone
- "Since the commercial availability of the Ostracodtoxkit, a substantial number of studies were carried out with the standard ostracod toxicity test in different laboratories of several countries , on a variety of sediments. Findings of several of these studies have been published in the scientific literature (Latif and Licek, 2004; Dirven-van Breemen et al., 2006; Drobniewska et al., 2007; Mankiewicz-Boczek et al., 2008; Watanabe et al., 2008; Wang et al., 2009; García- Lorenzo et al., 2009; Coccia et al., 2009; Silva et al., 2011; Kudlak et al., 2011; Nalecz-Jawecki et al., 2011; Steliga, 2011; Sheahan and Fisher, 2012; Huerta Buitrago et al., 2013; Watanabe et al., 2013; Ruiz et al., 2013; Khanal et al., 2014; Sevilla et al., 2014; Palma et al., 2014). Titles, abstracts, and posters of other studies presented at international symposia on ecotoxicology can be found on the website www.microbiotests.be "
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ABSTRACT: The review first details the development of the test procedures with Hyalella azteca which historically emerged as one of the recommended test species for whole-sediment assays and its gradual standardization and endorsement by national and international organizations. The sensitivity and precision of the H. azteca test for application on chemicals and on real world sediments is discussed. The review subsequently addresses the development of the whole sediment microbiotest with the ostracod crustacean Heterocypris incongruens with larvae of this test species hatched from dormant eggs (cysts), rendering this assay stock culture/maintenance free. The application of the 6-day ostracod microbiotest on sediments in Canada and in Belgium is discussed, as well as its endorsement by the ISO subsequent to an extensive international interlaboratory ring test. The sensitivity of the amphipod and ostracod tests is compared by data from studies in which both assays were applied in parallel. A comparison of more than 1000 ostracod/amphipod data pairs of a 12-year river sediment monitoring study in Flanders/Belgium confirmed that both whole-sediment assays have a similar sensitivity and that the 6-day ostracod microbiotest is a valuable and cost-effective alternative to the 10-14 day amphipod test for evaluation of the toxic hazard of polluted sediments.
Knowledge and Management of Aquatic Ecosystems 01/2015; 2015(416):15. DOI:10.1051/kmae/2015011 · 0.93 Impact Factor
Available from: Lucia Santorufo
- "In addition, litter characteristics influence decomposition processes, as thin leaves decompose easily, whereas thick leaves are more recalcitrant (Cornelissen, 1996; Cornelissen and Thompson, 1997). Generally, leaves with a high specific leaf area and low dry matter content experience higher colonization by decomposers (Bakker et al., 2011), which in turn can transfer what they ingest to other organisms in the trophic chain (Wang et al., 2009). http://dx.doi.org/10.1016/j.apsoil.2014.02.008 0929-1393/© 2014 Elsevier B.V. All rights reserved. "
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ABSTRACT: In this study we investigated collembolan communities using both taxonomy- and trait-based approaches in order to determine: (1) which soil or leaf litter characteristics are the main agents of species distribution and functional trait distribution in collembolan communities, and (2) which functional traits are more prevalent in species tolerant to urban environments. To investigate this, soil and leaf litter were sampled in the urban area of Naples, Italy and the collembolan community was analyzed using taxonomic and functional approaches. The results indicated that collembolan density was negatively affected by site pollution, and that species richness, diversity and evenness were positively affected by the organic matter content of the soil. Folsomia lawrencei was the most abundant species in sites with high metal contamination and low soil organic matter content, whereas Mesaphorura sp. and Parisotoma notabilis were the most ubiquitous taxa overall. The main agents affecting the frequency of functional traits were metal contamination of soil and litter, soil organic matter content, leaf specific mass and thickness of the litter. The species most tolerant to urban environmental conditions were found to have small body size, jumping motion strategy, sexual reproduction and presence of pigmentation.
Applied Soil Ecology 06/2014; 78:48–56. DOI:10.1016/j.apsoil.2014.02.008 · 2.64 Impact Factor
Available from: Antonio Toscano
- "Technol. characterize the toxicity of fluvial sediments (e.g., Wang et al. 2009 "
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ABSTRACT: This paper revises the response of freshwater ostracods to different environmental conditions and anthropogenic impacts, with a worldwide overview of the potential use of these microcrustaceans as bioindicators and several examples of applications in different scenarios. The development of either a single species or an ostracod assemblage is influenced by physical–chemical properties of waters (salinity, temperature, pH, dissolved oxygen), hydraulic conditions, bottom grain sizes or sedimentation rates. In addition to population and community changes, morphological and geochemical changes can also be detected in the ostracod carapace, which serves as a tracer of the water quality. All these features permit to delimit the spatial effects of urban sewages, mining effluents, agricultural wastes, watershed deforestation or road building. These data are the basis for the palaeoenvironmental reconstruction of cores, with an interesting application to archaeology. In addition, favourable results of recently developed bioassays, coupled with an important variability of local assemblages under changing conditions in both waters and sediments, suggest that these microcrustaceans may included between the most promising sentinels groups in freshwater areas. These microcrustaceans show high sensitivity to pesticides, herbicides, heavy metal pollution and oil inputs.
International journal of Environmental Science and Technology 03/2013; DOI:10.1007/s13762-013-0249-5 · 2.19 Impact Factor
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