Toxicity identification of metals: Development of toxicity identification fingerprints

Sprang, Patrick A. Van; Janssen, Colin R.

doi:10.1002/etc.5620201128

Cited by 26 publications

(4 citation statements)

References 30 publications

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“…It was estimated that on average about 50% of the total DOC in natural waters may have copper complexing properties [9]. Other water characteristics (such as pH, hardness, and suspended matter) may influence the availability of copper [10–14].…”

Section: Introductionmentioning

confidence: 99%

Copper toxicity in relation to surface water‐dissolved organic matter: Biological effects to Daphnia magna

Kramer¹,

Jak²,

Hattum

et al. 2004

Enviro Toxic and Chemistry

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Water quality standards for copper are usually stated in total element concentrations. It is known, however, that a major part of the copper can be bound in complexes that are biologically not available. Natural organic matter, such as humic and fulvic acids, are strong complexing agents that may affect the bioavailable copper (Cu2+) concentration. The aim of this study was to quantify the relation between the concentration of dissolved natural organic matter and free Cu2+ in surface waters, and the biological effect, as measured in a standardized ecotoxicological test (48 h-median effective concentration [EC50] Daphnia magna, mobility). Six typical Dutch surface waters and an artificial water, ranging from 0.1 to 22 mg/L dissolved organic carbon (DOC), were collected and analyzed quarterly. Chemical speciation modeling was used as supporting evidence to assess bioavailability. The results show clear evidence of a linear relation between the concentration of dissolved organic carbon (in milligrams DOC/L) and the ecotoxicological effect (as effect concentration, EC50, expressed as micrograms Cu/L): 48-h EC50 (Daphnia, mobility) = 17.2 x DOC + 30.2 (r2 = 0.80, n = 22). Except for a brook with atypical water quality characteristics, no differences were observed among water type or season. When ultraviolet (UV)-absorption (380 nm) was used to characterize the dissolved organic carbon, a linear correlation was found as well. The importance of the free copper concentration was demonstrated by speciation calculations: In humic-rich waters the free Cu2+ concentration was estimated at approximately 10(-11) M, whereas in medium to low dissolved organic carbon waters the [Cu2+] was approximately 10(-10) M. Speciation calculations performed for copper concentrations at the effective concentration level (where the biological effect is considered the same) resulted in very similar free copper concentrations (approximately 10(-8) M Cu) in these surface waters with different characteristics. These observations consistently show that the presence of organic matter decreases the bioavailability, uptake, and ecotoxicity of copper in the aquatic environment. It demonstrates that the DOC content must be included in site-specific environmental risk assessment for trace metals (at least for copper). It is the quantification of the effects described that allows policy makers to review the criteria for copper in surface waters.

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Section: Introductionmentioning

confidence: 99%

Copper toxicity in relation to surface water‐dissolved organic matter: Biological effects to Daphnia magna

Kramer¹,

Jak²,

Hattum

et al. 2004

Enviro Toxic and Chemistry

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“…They may cause lethal and sublethal effects upon the resident biota which in turn may lead to declines in taxa richness and abundance, and shifts of community composition due to elimination of metalsensitive taxa within the affected aquatic ecosystems. [71][72][73][74] observed a reduced abundance of metalsensitive mayflies and an increase in metal-tolerant orthoclad chironomids in New Zealand streams.…”

Section: Pollution Assessment Of Watermentioning

confidence: 97%

Environmental geochemical signature of shale in pollution assessment of trace metals in soil and water in parts of southern Benue trough, southeastern Nigeria

Nganje

Adamu

Ekwere

et al. 2021

International Journal of Environmental Analytical Chemistry

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Black shales have a great environmental geochemical significance and act as a source of metal enrichment which upon weathering could release trace elements into soil system where they are in turn mobilized and release into surface water and groundwater systems. An investigation of environmental geochemistry of rock, soil and water in parts of Abakaliki, southeastern Benue trough, Nigeria was carried out in order to evaluate the impact of shale bedrock in the soil and water environment. Shale rock, soil and water samples were collected from ten (10) locations within the study area and were analyzed for major and trace elements using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). In situ parameters such as pH, in water was measured in the field. The results shows that Pb is highly enriched while As. Cr, Co, Fe, Ni, Sr, V and Zn are slightly enriched in the shales relative to the global shale average. Similar geochemical trend was observed for surface and subsurface soils. Also, the mean concentration of As, Co. Cu. Mn, Pb and Zn in soils at both depths are higher than the mean concentrations in the shale bedrock in the area of study, implying relative enrichments of these metals in the soils of the study area. In addition, the mean values of Al, Fe, Ti, Cr, Ni, Sr and V in both soil depths are lower than the values recorded in the shale bedrock. Relationship between pH and metal load suggested that the waters are dominantly near neutral to alkaline range suggesting that acidic contaminants do not affect the water quality. The mean concentration of Al, Fe, Mn and Pb in groundwater and surface water was above the regulatory standards indicating contamination of the water. The calculated enrichment factor, anthropogenic inputs, pollution index for soil indicated that the soil are highly contaminated through numerous geogenic and anthropogenic sources with Pb being the most toxic metal with the shale bedrock and the mineral load contained in them as the major contributor of these contaminants..

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“…Toxicity identification evaluation (TIE) identifies substances responsible for acute lethality through specific treatments, and it often is initiated to correct a noncompliance issue. For example, the ethylenediaminetetraacetic acid (EDTA) chelation test is used to complex metals and to discriminate between toxicity from metals and that from other sources [14,15]. Based on the U.S. Environmental Protection Agency approach, a guidance document regarding TIE methods also was developed for Canadian mines [16] (http://www.…”

Section: Introductionmentioning

confidence: 99%

“…nrcan.gc.ca/ms/canmet-mtb/mmsl-lmsm/enviro/time/docs/ GuidanceDocumentforConductingTRE.PDF). Toxicity identification evaluation procedures already have been used to identify metal toxicity in natural/artificial effluents and freshwater samples [7,14,15,17]. In addition to TIE procedures, metal speciation can help to address the toxicity of biologically treated mining effluent.…”

Section: Introductionmentioning

confidence: 99%

Toxicity and Metal Speciation in Acid Mine Drainage Treated by Passive Bioreactors

Neculita¹,

Vigneault²,

Zagury³

2007

Environ Toxicol Chem

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Sulfate-reducing passive bioreactors treat acid mine drainage (AMD) by increasing its pH and alkalinity and by removing metals as metal sulfide precipitates. In addition to discharge limits based on physicochemical parameters, however, treated effluent is required to be nontoxic. Acute and sublethal toxicity was assessed for effluent from 3.5-L column bioreactors filled with mixtures of natural organic carbon sources and operated at different hydraulic retention times (HRTs) for the treatment of a highly contaminated AMD. Effluent was first tested for acute (Daphnia magna and Oncorhynchus mykiss) and sublethal (Pseudokirchneriella subcapitata, Ceriodaphnia dubia, and Lemna minor) toxicity. Acute toxicity was observed for D. magna, and a toxicity identification evaluation (TIE) procedure was then performed to identify potential toxicants. Finally, metal speciation in the effluent was determined using ultrafiltration and geochemical modeling for the interpretation of the toxicity results. The 10-d HRT effluent was nonacutely lethal for O. mykiss but acutely lethal for D. magna. The toxicity to D. magna, however, was removed by 2 h of aeration, and the TIE procedure suggested iron as a cause of toxicity. Sublethal toxicity of the 10-d HRT effluent was observed for all test species, but it was reduced compared to the raw AMD and to a 7.3-d HRT effluent. Data regarding metal speciation indicated instability of both effluents during aeration and were consistent with the toxicity being caused by iron. Column bioreactors in operation for more than nine months efficiently improved the physicochemical quality of highly contaminated AMD at different HRTs. The present study, however, indicated that design of passive treatment should include sufficient HRT and posttreatment aeration to meet acute toxicity requirements.

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Toxicity identification of metals: Development of toxicity identification fingerprints

Cited by 26 publications

References 30 publications

Copper toxicity in relation to surface water‐dissolved organic matter: Biological effects to Daphnia magna

Copper toxicity in relation to surface water‐dissolved organic matter: Biological effects to Daphnia magna

Environmental geochemical signature of shale in pollution assessment of trace metals in soil and water in parts of southern Benue trough, southeastern Nigeria

Toxicity and Metal Speciation in Acid Mine Drainage Treated by Passive Bioreactors

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