The sediment testing program yielded a broad, high quality data set that was used to develop a Species Sensitivity Distribution for benthic organisms in various sediment types, a reasonable worst case predicted no-effect concentration for nickel in sediment (PNEC sediment), and predictive models for bioavailability and toxicity of nickel in ...

The mobilisation of sediments and related contaminants connected to dredging activities is one of the most critical issues to the environmental risk and exposure assessment of a dredging project.

Nickel (Ni) 5. Potassium (K) 3. Vanadium (V) 1. Cyanide : 1. Sediment (5 total samples) Phenanthrene : 1. ... Risk Characterization. ... DDD may represent an ecological risk in canal sediments, but, again, the exceedance is isolated, and the significance of the risk may be overestimated by the conservative TOC assumption. ...

Among them, the risk quotient (RQ) is the most feasible method for the risk characterization of pollutants in environment and has been used to evaluate the risk level of Hg in sediment (Du et al., 2015). Based on the Hg concentrations in Taihu Lake sediment and the SQC of Hg derived in this study, the RQ method was used to evaluate the ...

This study comprehensively reported the environmental risk characterization and ecological process determination of bacterial antibiotic resistome in the sediments of two urban lakes highly impacted by human activities using a proposed technological framework integrating several advanced methods and models.

ECOLOGICAL RISK ASSESSMENT OF TRACE METALS IN SEDIMENTS ALONG THE EGYPTIAN MEDITERRANEAN COAST Presented by Naglaa Farag Elsayed Soliman Examiners Committee: Approved Prof. Dr. Mamdouh Saad Masoud

Thus, the ecological risk of booster biocides to sediment-dwelling organisms from the Brazilian coast was assessed using a risk characterization approach through the Risk Quotien ... DOI: 10.1016/j.chemosphere.2021.130155

Use of Ambient Sediment Data In Risk Assessments ... Regulatory agencies are recommending that ambient conditions should be considered during the risk characterization step of the ecological risk assessment, and that ambient conditions should not be used as a tool for screening out constituents of potential ... Nickel 33/33 15.5 46.2 50.76 99 ...

To assess nickel (Ni) toxicity and behavior in freshwater sediments, a large-scale laboratory and field sediment testing program was conducted. The program used an integrative testing strategy to generate scientifically based threshold values for Ni in sediments and to develop integrated equilibrium partitioning-based bioavailability models for ...

exceeding EQS for nickel in freshwater sediments and risk characterization for sediments. 8 Annexes: Background reports: Letter from NiPERA reporting the outcome of the conclusion of the sediment testing program, Now 18 th referring to research and reports commissioned by NiPERA. An Executive Summary drafted by the

A subset of 6 nickel-spiked sediments was deployed in the field to examine benthic colonization and community effects. The sediment testing program yielded a broad, high quality data set that was used to develop a Species Sensitivity Distribution for benthic organisms in various sediment types, a (SSD)

Using empirical bioavailability relationships to predict nickel toxicity based on sediment chemistry parameters, Schlekat et al. [202] reported ranges of HC5 values from 136 to 437 mg Ni/kg for ...

Risk Characterisation. Risk is the 'probability of an adverse effect on man or the environment occurring as a result of a given exposure to a chemical or mixture' (Van Leeuwen and Vermeire, 2007). A hazard only becomes a risk if exposure exceeds a safe threshold value. Hazard identification and exposure determination have been discussed in previous sections…

This paper reports the bioavailability of the metals (cadmium, copper, zinc, lead, and nickel) in sediment samples collected in seven stations from the São Paulo Estuary, Todos os Santos Bay, Brazil. The bioavailability was determined by employing the technique "acid-volatile sulfide (AVS) and simul …

To assess nickel (Ni) toxicity and behavior in freshwater sediments, a large-scale laboratory and field sediment testing program was conducted. The program used an integrative testing strategy to generate scientifically based threshold values for Ni in sediments and to develop integrated equilibrium partitioning-based bioavailability models for ...

Background issues are addressed during risk characterization rather than in COPC selection. This newer approach presents a more thorough picture of risks, but may generate ... SOURCE OF METALS: Natural deposits of nickel and chromium in soils and sediments from ultramafic serpentine rock. HISTORY: Soil and rock used as fill for buildings and ...

Background issues are addressed during risk characterization rather than in COPC selection. This newer approach presents a more thorough picture of risks, but may generate ... SOURCE OF METALS: Natural deposits of nickel and chromium in soils and sediments from ultramafic serpentine rock. HISTORY: Soil and rock used as fill for buildings and ...

The behavior of metals in sediments after their disposal to land has important implications for the environmental management. The sediment from the Carska Bara (Serbia) was polluted with adequate metal salts in order to reach severe contamination based on the pseudo-total metal content of Pb, Cd, Ni, Zn, Cu, and Cr according to the corresponding Dutch standards and …

The subsequent risk characterization of the site contaminants indicated that potential groundwater ingestion presented the greatest public health hazard. The upperbound excess lifetime cancer risk for groundwater ingestion was found to be 1 x 10"2. It was also found that the upperbound lifetime risk for soil/sediment exposure was 1 x 10~4. o c: o o

Environmental risk characterization and ecological process determination of bacterial antibiotic resistome in lake sediments Environment International ( IF 9.621) Pub Date :, DOI: 10.1016/j.envint.2020.106345

Risk characterization. Risk was characterized by comparison of point exposures and the effect benchmarks established for the target compounds. The selected approach was the hazard quotient (HQ) method, where the ratio between exposure and effect concentrations is used for screening ecological risk assessment of contaminated sediments (Chapman ...

Ecological Risk Assessments at US Department of Defense Facilities ... mercury, and nickel for both soil and sediments; and copper, tin and zinc for sediments only). ... bioavailability, including information on soil collection and characterization necessary to support

harm sediment-dwelling organisms, wildlife, or human health (also called chemicals of concern). Contaminated sediment – Sediment containing chemical substances at concentrations that pose a known or suspected threat to environmental or human health. Dredging – Removal of material from the bottom of a water body by excavation or similar

Int. J. Environ. Res., 3(4):581-598, Autumn 2009 ISSN: 1735-6865 Characterization and Risk Assessment Studies of Bed Sediments of River Adyar-An Application of Speciation Study Venugopal, T.*, Giridharan, L. and Jayaprakash, M. Department of Applied Geology, University of Madras, Guindy, Chennai - 600 025, India Received 14 April 2008; Revised 22 Dec. 2008; Accepted 7 July 2009 …

chemical characterization for nickel spiked sediments Supporting field based toxicity data and chemical characterization-phase speciation data for laboratory spiked sediments Preliminary risk characterization for Ni emitting industries in Technical oversight by TC i) Group, which was comprised

Hazard identification, exposure assessment, dose–response assessment, and risk characterization are the key elements of health risk assessment (NRC 1983). Health risk assessment can be determined by the non-carcinogenic and carcinogenic risk for both adults and children.

nickel in sediment (PNECsediment), and predictive model for bioavailability and toxicity of nickel in freshwater sediments. A provisional risk characterization (RC) was performed using emissions from Ni producing and downstream user industry sectors. The RC highlighted the importance of the uncertainty analysis component of the EU risk assessment

Characterization and risk assessment of metals in surface sediments and riparian zone soils were studied in Liaohe River, northeast China. Surface sediment and riparian soil samples were collected from 24 monitoring sites along 538 km of Liaohe River. Metal concentrations and enrichment factors of Zn, Cr, Pb, Cu, Ni, and As were analyzed.

lead, cadmium, cobalt, copper, chromium, nickel, vana-dium, and zinc as well as for soil physico-chemical prop-erties. The mine waste sediments were dominated by silt whilst the forest soil by sand particles, with significantly high bulk density in the former. Both the forest soil and overburden sediments were acidic than the alkaline tailings

Isolation and Characterization of Nickel Tolerant Bacterial Strains from Electroplating Effluent Sediments Mahalingam.P.U1, Ranjithkumar.M2, Anchana Durga Maruthi.R.3 Department of Biology, Gandhigram Rural Institute-Deemed University, Gandhigram-624302, Dindigul District, Tamil Nadu, India. *Corresponding Author Email: [email protected]

risk assessment, and may include receptor characterization, ecological effects characterization, ecological surveys (as opposed to mere characterizations) and site-specific toxicity testing to refine exposure/risk (see footnote 1, below). This ERA uses a conservative approach, defined as tier 1 in the

Characterization of the effects of binary metal mixtures on short-term uptake of Ag, Cu, and Ni by rainbow trout (Oncorhynchus mykiss). Aquatic Toxicology 180: 236-246. 2016. Costello DM, Hammerschmidt CR, Burton GA. Nickel partitioning and toxicity in sediment during aging: Variation in toxicity related to stability of metal partitioning.

Characterization of the Galisteo Reservoir retained sediments that are likely to be released as a result of saltcedar eradication was performed to determine whether the sediments released to Galisteo Creek may pose an adverse risk to human health and the aquatic environment downstream of …

RISK CHARACTERIZATION OF CONTAMI NANTS IN PAS SAIC RIVER SEDIMENTS, NEW JERSEY . Victor Onwue me and Huan F eng* ... Nickel in Sediments. Environmental Science and . …

RISK CHARACTERIZATION OF CONTAMI NANTS IN PASSAIC RIVER SEDIMENTS, NEW JERSEY . Victor Onwueme and Huan Feng* Department of Earth and Environmental Studies . Montclair State University . Montclair, New Jersey 07043 . ABSTRACT: Sediment data from the Passaic River collected in 1991, 1993, 1995, and 1999 were analyzed for