CN105738590A - Determining method for aquatic organism protection water quality standard of bioaccumulation substance - Google Patents

Determining method for aquatic organism protection water quality standard of bioaccumulation substance Download PDF

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CN105738590A
CN105738590A CN201610096698.0A CN201610096698A CN105738590A CN 105738590 A CN105738590 A CN 105738590A CN 201610096698 A CN201610096698 A CN 201610096698A CN 105738590 A CN105738590 A CN 105738590A
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water quality
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吴丰昌
苏海磊
郭飞
孙福红
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Abstract

The invention belongs to the technical field of water quality protection, and particularly relates to a determining method for an aquatic organism protection water quality standard of a bioaccumulation substance. The method includes the following steps of collecting and screening toxicity data NOED; obtaining the optimal fitted equation through fitting; obtaining a reference value BTC based on tissue through the optimal fitted equation; obtaining an aquatic organism protection water quality criteria WQC of the bioaccumulation substance; obtaining predicted environment concentration PEC; determining the aquatic organism protection water quality standard WQS of the bioaccumulation substance. The aquatic organism protection water quality standard WQS of the bioaccumulation substance can be scientifically determined, the aquatic ecosystem of China can be protected more scientifically, and a new thought and method are provided for formulating the water quality standard in China.

Description

A kind of defining method of the protection aquatile water standard of bioaccumulation material
Technical field
The invention belongs to water quality protection technical field, be specifically related to the defining method of the protection aquatile water standard of a kind of bioaccumulation material.
Background technology
As the important criterion of China's water environment management, water standard is the important research work in China's present stage environmental area.Science determines that water standard can provide basic basis for China's water environment management, and protection China aquatic ecosystem is healthy and stable, contributes to making smooth advances of Ecological Civilization Construction.Protection aquatile water standard is the important component part in China's water standard system, and how science determines that aquatile water standard is progressively subject to the attention of Domestic Environment protection worker.Aquatile is the most important composition in aquatic ecosystem, ensures that hydrobiological safety is premise and the basis of Water ecoenvironment.As the scientific basis determining aquatile water standard, the aquatile water quality benchmark study of China achieves the progress of stage in recent years.
China has carried out the protection aquatile water quality benchmark study of comparatively system at present, and obtains the aquatile water quality reference value of partial contamination thing.Owing to these aquatile water quality benchmark obtain based on the toxicity data of water, the material with bioaccumulation is likely to result in hydrobiological " under proteciton ", because do not account for biological effectiveness and the cumulative bad of this kind of material based on the toxicity data of water.Tissue concentration is the direct embodiment of cumulative bad material biological effectiveness.Therefore, for having bioaccumulation material, use the toxicity data derivation water quality benchmark based on tissue can the protection aquatile of science more.Water quality benchmark is the foundation that science determines water standard, and water standard is based on the basis of water quality benchmark, with due regard to determines to pollutant load level in the conditions such as the economic technology of country and water body.But how water quality benchmark is converted into water standard, all the time all without concrete operational approach, is a great problem of water standard formulation.
Summary of the invention
It is an object of the invention to provide the defining method of the protection aquatile water standard of a kind of bioaccumulation material, to solve in prior art because not considering the problem that the water standard that bioaccumulation material is formulated causes aquatile under proteciton.
In order to realize foregoing invention purpose, the invention provides the defining method of the protection aquatile water standard of a kind of bioaccumulation material, the method comprises the following steps:
Step one, the collection of toxicity data NOED and screening
Collect the toxicity data NOED based on aquatile tissue of bioaccumulation material, and according to the toxicity data screening principle of international endorsement, the data collected are screened, wherein, bioaccumulation material can for organic mercury and/or PBDE, specifically for organic mercury, more specifically for methyl mercury；
Step 2, by process of fitting treatment obtain optimal fitting equation
It is fitted the toxicity data NOED based on aquatile tissue filtered out in step one processing, choose optimal fitting equation, thus obtaining the species sensitivity optimal fitting equation of bioaccumulation material, wherein, described process of fitting treatment adopts the conventional model of fit such as logarithm normal distribution, logistic distribution, three parameter distribution；
Step 3, by optimal fitting equation obtain based on tissue reference value BTC
Based on risk safe evaluation method to Y assignment, utilize the optimal fitting equation that step 2 obtains, try to achieve HC100YValue, takes HC100YValue is equal to the reference value BTC based on tissue, and wherein, the span of Y is 0～1, for instance, take Y value equal to 0.1, the HC obtained10Value i.e. protection 90% hydrobiological bioaccumulation material concentration；Take Y value equal to 0.05, the HC obtained5Value i.e. protection 95% hydrobiological bioaccumulation material concentration；
Step 4, obtain bioaccumulation material protection aquatile water quality benchmark WQC
Use the aquatile bioaccumulation factor B AF to bioaccumulation material; BTC is converted into the water quality benchmark WQC represented with concentration in water; use formula W QC=BTC/BAF; take the maximum of bioaccumulation factor B AF; such as 200000L/kg, calculates the protection aquatile water quality benchmark WQC obtaining bioaccumulation material；
Step 5, acquisition prediction ambient concentration PEC
Collect the content data of bioaccumulation material in different basin water environment, adopt the processing method identical with step 2 and three that above-mentioned content data carries out cumulative probability distribution simulation process, obtain prediction ambient concentration PEC；Wherein, for China's water body, Y=0.9 is taken, then it represents that arbitrarily choosing a basin water body in China, the probability of the content 90% of bioaccumulation material therein is lower than PEC；
Step 6, determine the hydrobiological water standard WQS of protection of bioaccumulation material
The water standard WQS of bioaccumulation material is determined according to WQC and PEC calculated in step 4 and five, if WQC >=PEC, directly take WQC as water standard WQS, such as, in step 5, Y value is 0.9, then illustrating that in water body, the probability of this bioaccumulation material concentration 90% is lower than water quality benchmark WQC, aquatile will not be produced adverse effect by this concentration；If WQC is < PEC, illustrates that in water body, aquatile may be produced adverse effect by the content of pollutant, take the geometric mean of WQC and PEC as water standard, i.e. WQS=(WQC*PEC)0.5。
The present invention uses the toxicity data NOED based on aquatile tissue and the aquatile water quality benchmark to the bioaccumulation factor B AF derivation bioaccumulation material of bioaccumulation material, and proposes the concrete grammar of a kind of simple possible converted by water quality benchmark to water standard.The method science can determine the protection aquatile water standard of bioaccumulation material, it is possible to more scientifically protects the aquatic ecosystem of China, and the formulation for China's water standard provides a kind of new approaches and new method.
Accompanying drawing explanation
Fig. 1 is that methyl mercury is to hydrobiological sensitivity distribution curve (SSD curve)；
Fig. 2 is the cumulative probability distribution curve of methyl mercury content in China's difference basin water environment.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described in detail.
Bioaccumulation material in following example will for methyl mercury, and water body is for China.
Embodiment 1
Step one, the collection of toxicity data NOED and Analysis and Screening
Collect the toxicity data NOED based on aquatile tissue of methyl mercury, and be analyzed screening to the data collected according to the toxicity data screening principle of international endorsement, such as, following principle is followed in toxicity data screening: (1) toxicology test should according to the toxicological experiment method of international endorsement；(2) each water quality factor of periodic monitoring is answered during test, such as temperature, pH, hardness, pollutant levels etc.；(3) life stage that biological subject is most sensitive is paid the utmost attention in acute toxicity test, when there is the toxicity data of the multiple life stage of biological subject, chooses the toxicity data of most sensitive life stage；(4) toxic endpoints of toxicity data is varied, pays the utmost attention to most sensitive index as toxic endpoints；(5) bion being once exposed to higher concentration compound to be studied or other pollutant before test cannot function as the tested species of toxicology test；(6) toxicity test should comprise blank process group；(7) dilution water can not be free from distilled water or the deionized water of suitable salt；(8) each process group pollutant actual concentrations is measured before on-test and when terminating as far as possible.The toxicity data result filtered out is as shown in table 1,
The toxicity data (NOED) based on tissue of table 1 methyl mercury
Species English NOED(mg/kg) Sequence number
Atlantic salmon Salmon-Atlantic 1.16 1
Grayling Grayling 0.63 2
Chidie clam Floater mussel 9.4 3
Neptune grass Mediterranean 0.008 4
The end Mummichog 11 5
Fathead minnow Fathead minnow 1.77 6
White macula fish Walleye 0.344 7
Brachydanio rerio Zebra Danio 0.4 8
U.S. bream Golden Shiner 0.23 9
Egretta alba Great Egret 3.4 10
Sacramento blackfish Sacramento 0.5 11
Carnis Pseudosciaenae Atlantic croaker 0.000467 12
Wild duck Mallard 3.7 13
Atlantic Ocean morrhua Atlantic Cod 0.9 14
Step 2, by process of fitting treatment obtain optimal fitting equation
The logarithm taking in step one in table 1 the toxicity data NOED corresponding to sequence number 1 to 14 is X-axis coordinate values, corresponding affected aquatile proportion is Y-axis coordinate values, wherein, affected aquatile proportion and every kind of hydrobiological cumulative probability (are tried to achieve by following steps: toxicity data NOED is ranked up from small to large, and give grade R successively, R is 1 to N, the grade of minimum average B configuration toxicity value is 1, the grade of maximum Mean toxicity value is N, utilizes formula P=R/ (1+N) to obtain the cumulative probability of each biology.)
Utilize popular software, for instance origin8, select the conventional model of fit such as logarithm normal distribution, logistic distribution, three parameter distribution, above-mentioned X and Y-axis numerical value are fitted, obtain the species sensitivity distribution curve (SSD curve) of methyl mercury；According to matching degree of association (R2) choose optimal fitting equation, the species sensitivity optimal fitting equation obtaining methyl mercury is
(1+10^ ((5.931-X) * 1.177), homologous thread is as shown in Figure 1 for Y=0.088+0.839/；
Step 3, by optimal fitting equation obtain based on tissue reference value BTC
In order to protect 90% aquatile, take the optimal fitting equation that Y value obtains equal to 0.1 substitution step 2, obtain an X value, take the antilogarithm of X value, obtain trying to achieve HC10Value=23.15 μ g/kg, are protection 90% hydrobiological methyl mercury concentration value, take HC10Value is equal to the reference value BTC, i.e. BTC=HC based on tissue10=23.15 μ g/kg.
Step 4, the use Fish bioaccumulation factor B AF to methyl mercury; BTC is converted into the water quality benchmark represented with concentration in water; use formula W QC=BTC/BAF; (Fish etc. can be enriched with in water ng level methyl mercury 10-20 ten thousand times by aquatic food web to take bioaccumulation factor B AF=200000L/kg; in order to protect to greatest extent to aquatile; in the present embodiment, bioaccumulation factor B AF takes the maximum in above-mentioned scope), calculating the protection aquatile water quality benchmark obtaining methyl mercury is WQC=0.12ng/L；
The content data of methyl mercury in step 5, collection China difference basin water environment, statistical result is as shown in table 2,
The content of methyl mercury in the water body of table 2 China's difference basin
Region (water body) Time Concentration (ng/L)
Song Hua River 2006 0-4.375 (average 1.21)
The Yarlung Zangbo River 2007 0.06-0.29 (average 0.12)
Han Feng lake 2010-2011 0.15-0.72 (average 0.39)
Wujiangdu 2006-2007 0.04-0.62 (average 0.15)
Aha reservoir 2005 0.26-2.05 (average 0.66)
Wujiang River middle and upper reaches reservoir 2006-2007 0.05-0.32 (average 0.11)
Caohai, Guizhou Province 2005-2006 0.11-0.67 (average 0.25)
Wujiang River Basin 2006-2009 0.08-0.15 (average 0.12)
Aha Lake 2005 0.002-0.43 (average 0.23)
Taihu Lake 2011 0.10-0.27 (average 0.19)
Guizhou Plateau reservoir 2012 0.03-0.30 (average 0.08)
Puding Region Guizhou Province reservoir 2007 0.06-0.18 (average 0.10)
The concentration value logarithm of the methyl mercury in table 2 is X-axis coordinate values, affected aquatile proportion is Y-axis coordinate values (the same step 2 of computational methods), utilize software origin8, select the conventional model of fit such as logarithm normal distribution, logistic distribution, three parameter distribution, above-mentioned X and Y-axis numerical value are fitted, obtain optimal fitting equation: Y=0.945-1.999/ (1+exp ((X-1.834)/0.313)), corresponding curve is as shown in Figure 2
Take Y equal to the 0.9 above-mentioned optimal fitting equation of substitution, obtain prediction ambient concentration PEC, i.e. PEC=1.04ng/L.
Step 6, determine the protection aquatile water standard of methyl mercury
By above calculating process it can be seen that WQC and the PEC of methyl mercury respectively 0.12 and 1.04ng/L.Due to, WQC < PEC, illustrate that in water body, aquatile may be produced adverse effect by the content of pollutant, if taking WQC as standard value, do not meet the national conditions of China's present stage, use their geometric mean as water standard, i.e. WQS=(WQC*PEC)0.5=0.35ng/L, the protection aquatile water standard of China's methyl mercury is 0.35ng/L.
Above-described embodiment is only used as descriptive purpose, and the scope of the present invention is not limited thereto.Modifying to one skilled in the art and be apparent from, the present invention is limited only by the restriction of scope.

Claims (7)

1. a defining method for the protection aquatile water standard of bioaccumulation material, the method comprises the following steps:
Step one, the collection of toxicity data NOED and screening
Collect the toxicity data NOED based on aquatile tissue of bioaccumulation material, and according to the toxicity data screening principle of international endorsement, the data collected are screened；
Step 2, by process of fitting treatment obtain optimal fitting equation
Being fitted the toxicity data NOED based on aquatile tissue filtered out in step one processing, choosing optimal fitting equation, thus obtaining the species sensitivity optimal fitting equation of bioaccumulation material；
Step 3, by optimal fitting equation obtain based on tissue reference value BTC
To Y assignment, utilize the optimal fitting equation that step 2 obtains, try to achieve HC100YValue, takes HC100YValue is equal to the reference value BTC based on tissue, and wherein, the span of Y is 0～1；
Step 4, obtain bioaccumulation material protection aquatile water quality benchmark WQC
Use the aquatile bioaccumulation factor B AF to bioaccumulation material, BTC is converted into the water quality benchmark WQC represented with concentration in water, use formula W QC=BTC/BAF, calculate the protection aquatile water quality benchmark WQC obtaining bioaccumulation material；
Step 5, acquisition prediction ambient concentration PEC
Collect the content data of bioaccumulation material in different basin water environment, adopt the processing method identical with step 2 and three that above-mentioned content data carries out cumulative probability distribution simulation process, obtain prediction ambient concentration PEC；
Step 6, determine the hydrobiological water standard WQS of protection of bioaccumulation material
Determine the water standard WQS of bioaccumulation material according to WQC and PEC calculated in step 4 and five, if WQC >=PEC, take WQC as water standard WQS；If WQC is < PEC, take the geometric mean of WQC and PEC as water standard, i.e. WQS=(WQC*PEC)0.5。
2. defining method according to claim 1, wherein, the bioaccumulation material described in step one is organic mercury and/or PBDE.
3. defining method according to claim 2, wherein, described organic mercury is first machine hydrargyrum.
4. method according to claim 1, wherein, the model of fit that process of fitting treatment described in step 2 adopts includes logarithm normal distribution, logistic distribution and three parameter distribution.
5. defining method according to claim 1, wherein, Y value described in step 3 is 0.1 or 0.05.
6. defining method according to claim 1, wherein, bioaccumulation factor B AF described in step 4 takes its maximum.
7. defining method according to claim 6, wherein, described bioaccumulation factor B AF is 200000.
CN201610096698.0A 2016-02-23 2016-02-23 Determining method for aquatic organism protection water quality standard of bioaccumulation substance Pending CN105738590A (en)

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CN106556683A (en) * 2016-11-23 2017-04-05 中国环境科学研究院 A kind of aquatile benchmark values determination method
CN107991452A (en) * 2018-01-09 2018-05-04 中国环境科学研究院 A kind of derivation method of the acute water quality benchmark of fresh water aquatic animal
CN109342675A (en) * 2018-09-21 2019-02-15 中国环境科学研究院 The method for making and subscribing of the protection aquatile surface water quality secure threshold of antimony
CN111259519A (en) * 2020-01-09 2020-06-09 大连理工大学 Method for checking local water quality reference of drainage basin

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CN106556683A (en) * 2016-11-23 2017-04-05 中国环境科学研究院 A kind of aquatile benchmark values determination method
CN107991452A (en) * 2018-01-09 2018-05-04 中国环境科学研究院 A kind of derivation method of the acute water quality benchmark of fresh water aquatic animal
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CN109342675A (en) * 2018-09-21 2019-02-15 中国环境科学研究院 The method for making and subscribing of the protection aquatile surface water quality secure threshold of antimony
CN111259519A (en) * 2020-01-09 2020-06-09 大连理工大学 Method for checking local water quality reference of drainage basin
WO2021138983A1 (en) * 2020-01-09 2021-07-15 大连理工大学 Watershed local water quality criteria verification method

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