Maximum permissible and negligible concentrations for some organic substances and pesticides

Crommentuijn, Trudie; Sijm, Dick T.H.M.; Bruijn, Jack de; Leeuwen, Cornelis van; Plassche, Erik van de

doi:10.1006/jema.2000.0334

Cited by 110 publications

(73 citation statements)

References 32 publications

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“…Alternatively, we could have used the LC 50 for oil of 100 mg/kg (Brils et al 2002). The Dutch procedure for deriving a MTC is to divide the median lethal concentration by 100 (Crommentuijn et al 2000a(Crommentuijn et al , 2000b, while in Canada a safety factor of 20 has been suggested by CCME (1995) if the toxicity data are from spiked sediment studies. This yields a SQG for oil of Ͻ5 mg/kg-a value below all the mineral oil concentrations observed in the harbor sediments and even below the limit of detection.…”

Section: Discussionmentioning

confidence: 99%

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Contaminants of Concern in Dutch Marine Harbor Sediments

Stronkhorst

Hattum

2003

Arch Environ Contam Toxicol

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Section: Discussionmentioning

confidence: 99%

“…In the Netherlands, Maximal Tolerable Concentrations (MTC; Crommentuijn et al 2000aCrommentuijn et al , 2000b) are used to assess the general quality of sediments in open waters. MTCs are based on the log-logistic distribution of NOECs and are assumed to be protective for 95% of the aquatic species.…”

Section: Sediment Quality Guidelines (Sqgs)mentioning

confidence: 99%

Contaminants of Concern in Dutch Marine Harbor Sediments

Stronkhorst

Hattum

2003

Arch Environ Contam Toxicol

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“…Publications by Crommentuijn et al (1997), Mayer and Ellersieck (1986), the AQUIRE database (http://www.epa.gov/ecotox/), and references in the papers about the evaluated microcosm and mesocosm studies have been used as a source of information for the toxicity data. If several EC 50 s were available for the same standard test organism, the geometric mean of these values was calculated and referred to as 'gm-EC 50 ' (Table 1).…”

Section: Comparison Between Insecticidesmentioning

confidence: 99%

Threshold Levels for Effects of Insecticides in Freshwater Ecosystems: A Review

2005

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Abstract. A literature review of freshwater (model) ecosystem studies with neurotoxic insecticides was performed to assess ecological threshold levels, to compare these levels with the first tier approach within European Union (EU) administration procedures, and to evaluate the ecological consequences of exceeding these thresholds. Studies published between 1980 and 2001 were reviewed. Most studies covered organophosphates and synthetic pyrethroids in lentic waters. The most sensitive taxa were representatives of crustaceans, insects and fish. Based on toxic units, threshold values were equivalent for compounds with a similar mode of action. This also accounted for the nature and magnitude of direct effects at higher concentrations. Although laboratory single species toxicity tests may not allow predictions on precise ecological effects, some generalisations on effects and recovery can be made with respect to acute standard laboratory EC 50 data. The NOEC ecosystem usually is a factor of 10 or more higher than first tier acceptable concentrations, particularly in the case of single applications and acetylcholinesterase inhibitors. Acceptable concentrations, as set by the EU first tier approach, appear to be protective. Recovery of sensitive endpoints usually occurs within 2 months of the (last) application when peak concentrations remain lower than (0.1-1) · EC 50 of the most sensitive standard test species. The consistency of response patterns found in model ecosystem studies can be useful when estimating the ecological risks of pesticides. The use of an effect classification system was also helpful in evaluating effects.

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“…In the present study, the negligible concentrations (NCs) and the maximum permissible concentrations (MPCs) of PAHs in water, sediments and bank soil reported by Kalf et al were used as the values in the medium. MPCs are the concentrations in the environment above which the risk of adverse effects is considered unacceptable to ecosystems, and NCs are the concentrations in the environment below which the occurrence of adverse effects is considered to be negligible [33]. Therefore, RQ NCs and RQ MPCs were defined as follows:…”

Section: Ecological Risk Assessmentmentioning

confidence: 99%

Pollution characteristics and ecological risk of polycyclic aromatic hydrocarbons (PAHs) in surface sediments of the southern part of the Haihe River system in China

Liu

Chen

et al. 2013

Chin. Sci. Bull.

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The southern part of the Haihe River system, the largest river system in the Haihe River Basin, is important to maintain a healthy ecosystem and safe drinking water as well as for the economic development of China. To assess the effect of rapid industrialization and urbanization on the pattern of polycyclic aromatic hydrocarbon (PAH) contamination, the PAH pollution characteristics of the southern part of the Haihe River system was investigated. Sixteen PAHs in surface sediments samples collected from 24 sites covering the southern part of the Haihe River system from the upstream to the estuaries were detected and analyzed. The total PAH concentration ranged from 258.77 to 11296.66 ng/g dry weight. On average, 2-, 3-, 4-, 5-and 6-ring PAHs comprised 25.32%, 27.22%, 22.62%, 14.89% and 9.96% of the total PAHs, respectively. Sites with high concentrations were concentrated in the Fuhe River, Fuyang River and Wei River, which are located near cities. A risk quotient (RQ) was used to assess the ecological risk of PAHs. The mean values of the RQ (MPCs) of individual PAHs were lower than 1.00, except for those of naphthalene (2.00) and pyrene (1.67). The RQ PAHs calculated for the samples indicated that the Xidayang reservoir and the estuary of the Ziya River were determined to be at a low risk level, while Baoding City, Handan City and Aixinzhuang were determined to be at a high risk level.polycyclic aromatic hydrocarbons, surface sediments, the southern part of the Haihe River system, distribution, composition profile, ecological risk assessment Citation:Liu F, Liu J L, Chen Q Y, et al. Pollution characteristics and ecological risk of polycyclic aromatic hydrocarbons (PAHs) in surface sediments of the southern part of the Haihe

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Maximum permissible and negligible concentrations for some organic substances and pesticides

Cited by 110 publications

References 32 publications

Contaminants of Concern in Dutch Marine Harbor Sediments

Contaminants of Concern in Dutch Marine Harbor Sediments

Threshold Levels for Effects of Insecticides in Freshwater Ecosystems: A Review

Pollution characteristics and ecological risk of polycyclic aromatic hydrocarbons (PAHs) in surface sediments of the southern part of the Haihe River system in China

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