LU502325B1

LU502325B1 - System and method for assessing health risk in asbestos mining area

Info

Publication number: LU502325B1
Application number: LU502325A
Authority: LU
Inventors: Shaopo Deng; Xuwei Li
Original assignee: Nanjing Inst Of Environmental Sciences Mee
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2023-01-06

Abstract

The present disclosure provides a system and a method for assessing health risk in an asbestos mining area. The system comprises an information collection layer for carrying out the environment survey and an information assessment layer for carrying out the risk assessment. The method comprises the steps of: collecting information relevant to a key survey area of an asbestos production area, field sampling and laboratory analysis, and human health risk assessment of the asbestos. In the present disclosure, the potential asbestos pollution situation is subjected to the environmental survey, and then the risk assessment is carried out, so as to judge the human health level and provide powerful basis for the later environment governance work.

Description

SYSTEM AND METHOD FOR ASSESSING HEALTH RISK IN ASBESTOS LU502325

MINING AREA TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of environmental risk monitoring, in particular relates to a system and a method for assessing health risk in an asbestos mining area.

BACKGROUND

[0002] As one of the numerous environmental pollutions, the asbestos pollution endangers human health mainly through the asbestos fiber as the transmission and ingestion medium.

[0003] The asbestos pollution in the mine environment is mainly from the natural process, such as the erosion and weathering of soil and rock and volcanic eruption, and the artificial process, such as the mining, processing and transporting of the asbestos mine and the production and use of the asbestos product. A risk assessment method special for the asbestos mining area is not available in the prior art.

SUMMARY

[0004] A system for assessing health risk in an asbestos mining area, comprising an information collection layer for carrying out environmental survey on the potential asbestos pollution situation in an asbestos production area to be assessed and a surrounding area range, and an information assessment layer for carrying out the risk assessment on the survey result of the information collection layer;

[0005] The information collection layer comprises a data collection unit for collecting the relevant report and literature in the asbestos production area and a field survey unit for carrying out the field layout and sampling on the asbestos production area and the surrounding area range. The field survey unit comprises an exploration unit for exploring the asbestos production area and the surrounding area range, a visiting unit for carrying out personnel interviewing in the asbestos production area and the surrounding area range and a sampling unit for carrying out field sampling and analysis on the asbestos production area and the surrounding area range.

[0006] The information assessment layer is an asbestos risk assessment unit for assessing the asbestos human health risk.

[0007] Further, a method for assessing health risk in an asbestos mining area comprises the steps of:

[0008] S1: collecting information

[0009] S1-1: collecting data

[0010] Collecting the information relevant to the asbestos production area and the survey area through the ways of historical data collation and analysis, persomel interview, field exploration and visit;

[0011] S1-2: field sampling and exploring:

[0012] Organizing personnel to preliminarily identify the plot pollution through the ways of field exploration and personnel interview, wherein the range of the field 1 exploration is the asbestos production area and the potential surrounding influence area, LU502325 and the field exploration mainly comprises the current situation, history, hydrogeology, landform and structures of the plot and the surrounding area, description of a facility and equipment, and preliminary identification of the field pollution;

[0013] S1-3: plot sampling and detection analysis

[0014] Arranging points for the environment air in the whole survey area for monitoring, and carrying out field sampling and laboratory analysis;

[0015] S2: assessment of asbestos human health risk

[0016] S2-1: identifying asbestos harm

[0017] S2-1-1: screening the risk assessment and paying attention to a pollutant-asbestos fiber;

[0018] S2-1-2: establishing a conceptual model according to the land use way in the plot and the surrounding area, and clearing a possible exposure pathway;

[0019] S2-1-3: identifying and concerning the toxicity hazard of the pollutant on human;

[0020] S2-2: asbestos exposure assessment,

[0021] Determining or assessing the frequency, period, exposure pathway and exposure quantity of the human exposed in the pollutant;

[0022] S2-3: asbestos toxicity assessment,

[0023] Obtaining human carcinogenic and nononcogenic toxic parameters concerning the pollutant, and supporting the calculation of the carcinogenic and nononcogenic risk;

[0024] S2-4: asbestos risk representation

[0025] Integrating all information according to the results of the exposure assessment and the toxicity assessment, and describing the risk in a qualitative or quantitative way, wherein the nononcogenic risk is described in a manner of hazard quotient; and for the potential carcinogenic risk, the possible carcinogenic risk level of a receptor is assessed by adopting an excessive lifelong cancer risk according to the asbestos content;

[0026] S2-5: uncertainty analysis

[0027] Carrving out sensitivity analysis on the plot parameters, screening and mastering the parameters with great influence on the risk assessment result, and then analyzing the source of these parameters;

[0028] S2-6: confirming a risk control value

[0029] Calculating a super-risk control value of the asbestos in the air according to the model, and finally confirming the risk control value of the asbestos in the air under the different land use ways, and taking the risk control value as the basis for the later risk control.

[0030] Further, the information of S1-1 relevant to the survey area of the asbestos production area specifically comprises area generalization, enterprise information review in the plot, a plot use history and current situation, plot environment pollution identification and a sensitive target.

[0031] Further, the area generalization comprises geographical location information, landform information, meteorological and hydrological information, area geology generalization information, orebody characteristics information, hydrogeological condition information, ecologic environment status survey information and 2 social-economic information in the asbestos production area. LU502325

[0032] Further, the enterprise information review in the plot is specifically a mining method, a production process and a potential pollution situation of the enterprise.

[0033] Further, the sensitive target is specifically a residential area, a lake and a reservoir, a scenic spot and a historical site, a natural reserve, a geological relic, a geological park and a scenic spot in the survey area.

[0034] Further, S1-3 plot survey and detection analysis specifically comprises:

[0035] S1-3-1: collecting an environment air sample

[0036] Arranging a plurality of environment air sample collection points in the whole survey area for air collection and field record, wherein the air sample collection points are distributed in a mining office area, a living quarter, near a dressing plant, a slag heap and other areas with human activities.

[0037] S1-3-2: sample analysis

[0038] Carrying out laboratory analysis for the air sample collected in S1-3-1.

[0039] Further, in S2-4, respectively calculating the risk of each exposure pathway according to the carcinogenic calculation method, and finally calculating the total carcinogenic risk by adopting an addition method.

[0040] Calculating the carcinogenic risk according to the formula ELCR=EPC-TWF-IUR, wherein ELCR represents an excessive lifelong cancer risk; EPC represents an exposure concentration, an asbestos fiber concentration in the air under a specific activity condition; TWF represents a time weighting factor, specifically a discontinuous cumulative exposure quantity within one year; and IUR represents a unit inhalation risk;

[0041] Calculating the nononcogenic hazard quotient according to the formula HQ=EPC-TWF/Rfc, wherein HQ represents a nononcogenic hazard quotient; EPC represents an exposure concentration, an asbestos fiber concentration in the air under a specific activity condition, TWF represents a time weighting factor; and Rfc represents a reference intake concentration;

[0042] Calculating the time weighting factor according to the formula TWF=Exposure time (hours exposed/day)/24 Exposure frequency (days/year)/365.

[0043] Further, carrying out the parameter sensitivity analysis in S2-5 according to the parameter sensitivity analysis method of Technical Guidelines for Risk Assessment of Soil Contamination of Land for Construction. In the possible value range of the parameter, changing 10% of one parameter value, keeping unchanged of other parameters, and then analyzing the influence of the changed parameters on the risk assessment calculation result.

[0044] The present disclosure makes up the blank of the previous risk assessment of the environmental governance in the asbestos mining area, and the whole design is reasonable. The potential asbestos pollution situation caused by the pit, tailings, raw material stacking, mineral separation area and the like in the asbestos mining area is subjected to environmental survey based on the survey and visit, collecting the plot situation and historical data as well as the relevant literatures and the results of the field exploration. The risk assessment is carried out for the survey result, so as to judge the human health level and provide powerful basis for the later governance work.

3

BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG 1 is a system module diagram of the present disclosure.

[0046] FIG 2 is a schematic diagram in a survey area range of an application example of the present disclosure.

[0047] FIG 3 is a schematic diagram of a mining enterprise distribution range in a survey area range of an application example of the present disclosure.

[0048] FIG 4 is a schematic diagram of a sampling point of an application example of the present disclosure.

[0049] FIG 5 is a conceptual model diagram of a plot of an application example of the present disclosure.

[0050] FIG. 6 is a spatial distribution diagram of an air acceptable carcinogenic risk point of an application example of the present disclosure.

[0051] FIG 7 is a spatial distribution diagram of an air nononcogenic risk point of an application example of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] As shown in FIG 1, a system for assessing health risk in an asbestos mining area, comprising an information collection layer for carrying out environmental survey on the potential asbestos pollution situation in an asbestos production area to be assessed and a surrounding area range, and an information assessment layer for carrying out the risk assessment on the survey result of the information collection layer;

[0053] The information collection layer comprises a data collection unit for collecting the relevant report and literature in the asbestos production area and a field survey unit for carrying out the field layout and sampling on the asbestos production area and the surrounding area range. The field survey unit comprises an exploration unit for exploring the asbestos production area and the surrounding area range, a visiting unit for carrying out personnel interviewing in the asbestos production area and the surrounding area range and a sampling unit for carrying out field sampling and analysis on the asbestos production area and the surrounding area range.

[0054] The information assessment layer is an asbestos risk assessment unit for assessing the asbestos human health risk.

[0055] A typical asbestos mine is subjected to health analysis and assessment by the assessment method provided in the present disclosure, and the mining area is a world-class large asbestos mine, and also the biggest asbestos production area throughout the country.

[0056] The data is collected in combination with the field survey, the document is confirmed according to the survey range, as shown in FIG 2, the survey range is confirmed as all asbestos mining areas in domestic and the destroy range, the total area is 14.11 km?, and the inflection point coordinates of the specific survey range are as shown in Table 1; Table 1: list of inflection point coordinates in the survey area Numbe Longitude Latitude Number Longitude Latitude 4 x LU502325 1 90.16784 38.37039 10 90.12531 38.34474 2 90.16531 38.36205 11 90.11866 38.34984 3 90.15785 38.3596 12 90.11447 38.357772 4 90.1482 38.35945 13 90.09866 38.35247

90.14192 38.36024 14 90.09866 38.36263 6 90.14063 38.35405 15 90.10716 38.36505 7 90.14771 38.3515 16 90.10553 38.36909 8 90.15027 38.34942 17 90.11946 38.37529 9 90.13021 38.34408 18 90.1488 38.38085

[0057] As shown in FIG 3, the survey range covers the Ruogiang asbestos mine, Jinshan asbestos mine and Bazhou asbestos mine with the main mining area, the production area, the living quarter and the like for the main asbestos mine. The mining license range and the floor area of the three asbestos mines are as shown in Table 2: Table 2: area statistics list of various enterprises in the survey area Area of the ineral Area of the Der Subtotal of Serial Company 14 separation area, mining license . actual area number name 5 the living quarter 5 (km?) (km*) and the like km?) Rucai 1 uogiang 2.0334 0.6884 27218 asbestos mine insh 2 Jmshan 0.8583 0.2976 1.1559 asbestos mine Bazhou 3 ; 0.726 2.5576 3.2836 asbestos mine Subtotal 3.6177 3.5436 7.1613 4 Other areas / ll 6.9487 Total 14.11

[0058] S1: collecting information

[0059] S1-1: collecting data

[0060] The method of collecting the information relevant to the asbestos production area and the survey area through the ways of historical data collation and analysis, personnel interview, field exploration and visit comprises but is not limited to the following contents: 1) an aerial photo or a satellite photo used to identify the development and activity status of the site and its adjacent areas; 2) other historical data, such as a floor plan used to evaluate the site pollution; 3) a list for a product, a raw and 5 auxiliary material and an intermediate product; 4) a geographical location map, LU502325 meteorological data and local basic statistical information; and 5) social information of the site, such as population density and distribution, and the sensitive target distribution. The main source of the data: 6) the change situation of the building, facility, process flow, production pollution and the like in the site during a transition process; 7) pollution record of the soil and underground water in the site; 8) stacking record of hazardous wastes in the site; 9) an underground pipeline map, a chemicals storage and use list, a leakage record, a waste management record, a ground and underground storage tank list; 10) environmental impact statement or table, environmental audit report; and 11) geological investigation report, hydrology, geology and other information.

[0061] S1-2: field sampling and exploring:

[0062] Organizing personnel to preliminarily identify the field pollution through the ways of field exploration and personnel interview, wherein the range of the field exploration is the asbestos production area and the surrounding area, and the field exploration mainly comprises the current situation and history of the plot, the current situation and history of the adjacent plot, the current situation and history of the surrounding areas, the description of geology, hydrogeology and landform, the description of a building, a structure, a facility and equipment, and preliminary identification of the field pollution;

[0063] S1-3: plot sampling and detection analysis

[0064] As shown in FIG 4, arranging 58 environment air sample collection points, which are respectively distributed in a mining office area, a living quarter, near a dressing plant, a slag heap, Yitunbulake Town and other areas with human activities.

[0065] S1-3-1: collecting an environment air sample

[0066] Collecting an air sample by an explosion-proof intelligent air sampler GilAir Plus, the erecting height of the equipment is 1.2-1.4m, the sampler (filter membrane holder) installed with a filter membrane is connected to a sampling pump, the whole sampling system is calibrated, so that the sampling flow is within the standard and regulated flow range, and then the sampling time is set according to the calibrated flow, so as to ensure that the sampling volume is not less than that required by the detection limit. After the sampling is finished, plugs at the two ends are covered again, and a rigid support with the filter membrane is transported to the laboratory.

[0067] S1-3-2: sample analysis

[0068] Carrying out laboratory analysis for the air sample collected in S1-3-1;

[0069] S1-4: survey result of the plot environment

[0070] The quantity of the submitted sample is 58 environment air samples according to the pollution identification result and 58 environment air sampling points in the survey area;

[0071] Confirming the environment air sample indicator in the site as the asbestos according to the site situation and the relevant specification;

[0072] S1-4-2: asbestos detection result of the environment air sample

[0073] In 58 submitted environment samples, the monitoring result of 24 samples is lower than the detection limit 0.007 fiber/cm*, the asbestos fiber content is detected in 6 the remaining samples, the asbestos fiber concentration distribution is 0.008-0.145 LU502325 fiber/cm°, and the average value is 0.0398 fiber/cm?;

[0074] S2: assessment of asbestos human health risk

[0075] Establishing a plot conceptual model as shown in FIG 5;

[0076] A sensitive receptor: the life and activity ways of the resident have a great difference under different land use ways, the factors affecting the exposure quantity, such as the frequency exposing in the pollutant, the period and the exposure pathway are different; and the adults and children are the sensitive receptors in the residential area to assess the carcinogenic risk and the nononcogenic risk;

[0077] Risk assessment parameter:

[0078] 1) Confirming a potential exposure scene in the concerning area: the first step for formulating the sampling plan or method is to confirm the potential exposure pathway in the concerning area, and then establish the conceptual model. The exposure situations assessed by EPA comprise the annual continuous exposure, living, garden planting, leisure and entertainment, children's playing, etc.; and this research considers the influence of the asbestos on the mining office area, the living quarter and the surrounding residential areas;

[0079] 2) Selection of EPC value: considering the characteristics of a specific plot, the risk range and the relevant uncertainty can be described by calculating a maximum value and a minimum value; and this air exposure concentration is the field measured value;

[0080] 3) Under the different exposure situations, the TWF value is selected as the table below: the daily exposure time under the living environment is 24h, the annual exposure day is 350d, and the TWF parameter is 0.96. Considering that there are a plurality of exposure situations in a certain life period, for example, an adult may undergo the living, outdoor labor, leisure and entertainment, childhood activities and the like before 30-year old, and the human exposure risk can be accumulated. Each person has different activities under the specific exposure model, so the target of the accumulated risk assessment is the receptor group depending on different types of interference activities, representing as the sum of the health risk of all kinds of asbestos exposure situations. The TWF value is confirmed by the ratio participating in the life period of each exposure scene, the TWF accumulated value is not greater than 1, and the time weighting factors under different exposure situations are as shown in Table 3: Table 3: time weighting factors under different exposure situations Exposure scene Daily exposure Daily exposure day TWF" time (h) (d) Continuous 24 365 1 throughout the year Living 24 350 0.96" Garden planting 10 50 0.057 7

Leisure and 1 156 0.018 LU502325 entertainment Children playing 2 350 0.080

[0081] In combination with the human settlement environment and the rule of the crowd activities, the target of this accumulated risk assessment is the risk under the specific exposure model, without accumulation, and only the asbestos fiber inhalation risk of the crowd under the outdoor activity situation is considered. Assume that the exposure scene is as follows: (1) assume that the adult activity exposure frequency in the mining office area is 62.5 d/a, TWF is 0.0107; @ assume that the children outdoor exposure frequency in the residential area outside the mining area is 87.5 d/a, the daily exposure time is 1h, the TWF is 0.010, the adult outdoor exposure frequency is 87.5d/a, the daily exposure time is 1h, and the TWF is 0.010;

[0082] 4) Selection of IUR (inhalation unit risk) value (age and exposure time): for the adult activity in the mining office area, when the initial exposure age is 20-year old and the exposure period is 24 years, the TUR is 0.065. For the children outdoor activity in the residential area outside the mining area, when the initial exposure age is 1-year old, the exposure period is 5 years, the [UR is 0.045. For the adult outdoor activity, when the initial exposure age is 20-year old and the exposure period is 24 years, the TUR is 0.065;

[0083] Assume to expose in a certain scene from the time of birth for 30 years, IURıTL value is 0.17, and the lifelong inhalation unit risk and non-lifelong inhalation unit risk under different continuous exposure scenes shown in Table 4 and the unit inhalation risk under different exposure scenes shown in Table 5 are obtained; Table 4: lifelong inhalation unit risk (IUR) and non-lifelong inhalation unit risk (IUR.T.) under different continuous exposure scenes Initial Exposure period (year) exposu re age 1 5 6 10 20 24 25 30 40 LT (year)

0.04 0.23 0 0.010 0.055 0.084 0.14 0.147 0.15 0.17 0.19 6 #

0.008 0.03

0.046 0.070 011 013 013 014 016 5 9

0.006 0.03

0.038 0.058 0.094 0.098 0.10 0.11 0.13 8 1

0.004 002 0.027 0.038 0.063 0.065 006 007 0.83 8

6 I 6 5 LU502325

0.003 0.01 0.04 0.04 0.05

0.018 0.025 0.042 0.043 1 4 5 8 2

[0084] Note: LT in the table represents the continuous contact from birth to death, and the continuity refers to the exposure for 24h and 365 days. Table 5: unit inhalation risk under different exposure scenes Exposure Initial exposure contact Exposure time IUR (fee) -L scene age (year) (year) Continuous throughout 0 Lifelong 0.23 (IRIS TUR) the year Living 0 30 0.17 Garden 20 30 0.075 planting Leisure and entertainmen 20 24 0.068 t Children I 5 0.045 playing

[0085] 5) Confirmation of Rfc (reference intake concentration) value: the nononcogenic hazard characteristic of the inhalation contact is the relative relation between the site exposure concentration and the Rfc value; and this assessment selects

0.00009PCM f/cc as the reference intake concentration;

[0086] 6) The parameter selection summary of the risk assessment process is as shown in Table 6; Table 6: selection of risk assessment parameter: Expo S°ns Outdoor Daily TWF (time IUR (unit itive exposure 440 . . sure exposure weighting inhalation Remarks scene rece frequency time (h) factor) risk) ptor * (d/a) Mini ns The initial office exposure age is nd Adu 62.5 1.5 0.0107 0.065 20-year old, and an the exposure living Ca period is 24 years quart er Perip Chil 875 1 0.0100 0.045 The initial heral dren exposure age 1s 9 reside 1-year old, and the LU502325 ntial exposure period is area 5 years The initial exposure age is Adu It 87.5 1 0.0100 0.065 20-year old, and the exposure period is 24 years

[0087] Wherein, the outdoor exposure frequency refers to the land use recommended value of Technical Guidelines for Survey Assessment of Soil Contamination of Land for Construction (HJ25.3-2019), the adult exposure frequency in the mining area selects the second type of land use value, and the peripheral residential area selects the first type of land use value;

[0088] The asbestos risk assessment result in the air is as shown in Table 7; Table 7: risk control value of air asbestos

S e n si Outd ti oor Dail Risk control Risk control

TWF Exp v expos vy . IUR value-asbest value-asbest (time ; osur e ure exp (unit os fiber os fiber e TT frequ osur weigh inhalat Remarks standard in ~~ concentratio ting . . sce € ency e factor ion the air of the n of the ne c¢ * time risk) carcinogenic nononcogen e (dla (h ) risk (f/ec) ic risk (f/cc) p ) t 0 r Min ing The initial offi exposure ce À age is area das qs 9010 0065 20vearold 01438 0.0084 and u 7 and the livi It exposure ng period is 24 qua years rter Peri C 0.010 The initial phe h 875 1 0 0.045 exposure 0.2225 0.0090 ral il age is resi d 1-year old, LU502325 dent r and the ial € exposure area n period is 5 years The initial exposure A age is d gs 1 000 0065 20-year old, 01540 0.0090 u 0 and the It exposure period 1s 24 years

[0089] Distribution of high risk points and pollutant:

[0090] The carcinogenic risk and the nononcogenic hazard quotient generated by the air asbestos detection concentration on human health in the risk assessment are respectively calculated under the living and office situation according to the established exposure conceptual model and the confirmed exposure pathway and the model parameter and based on the strict principle. 1.0E-04 of air asbestos 1s the acceptable carcinogenic risk level according to the suggested carcinogenic risk level. According to the formula, it can calculate that the carcinogenic risk control values under three scenes of adult living or office in the mining area, adult outdoor activity and children outdoor activity in the peripheral residential area are 0.1438, 0.2225 and 0.1540 f/cc. During this assessment, the periphery of the mining area is strictly selected, and 0.1540 f/cc is used as the assessment standards, and 0.1438 f/cc is selected as the assessment standard in the mining area range. For the nononcogenic risk, 1 is used as the acceptable risk level, and the human health risk and HQ are in an increasing relationship. In the mining area range, 0.0084 f/cc is strictly selected as the assessment standard.

[0091] 37 air points around the residential and office areas are selected from three mining areas, area with main ore, and the peripheral area. The exposure situation meets the asbestos risk assessment system, and the health risk in the dressing plant and other production areas refers to National Occupational Health Standards of the People's Republic of China (GBZ/T 192.5-2007), and is not listed in the range of this human health risk assessment. It can be known, from the risk assessment result, that the air concentration is within the acceptable carcinogenic risk level, and the peripheral residential area is less affected by the asbestos diffusion degree. In addition, according to the detection result, 13 points exceed the acceptable nononcogenic risk level, wherein the maximum point exceeding the standard is ASRO8. From the surroundings, it can be known that a large number of tailings and waste residue are stacked around ASRO8, and the raise dust results in a higher nononcogenic risk level of this point.

[0092] The high risk point is screened according to the risk control value of the asbestos in the air. By using the GIS space drawing software, the above model calculation result is subjected to the representation of the pollutant human health risk in the space at the position of the actual sampling assessment point, and then the point 11 space distribution drawing on the plot is drawn. The human health risk space LU502325 distribution drawing of each point is as shown in FIG 6 and FIG 7: the circular spot in FIG 6 is the distribution situation of the acceptable risk level point, the circular spot represents the acceptable carcinogenic risk; the black circular spot in FIG 7 represents the hazard quotient, the gray point is the undetected point, and a half of the detection limit is used as the theoretical calculation parameter value of the undetected sampling point HQ (nononcogenic risk);

[0093] Uncertainty analysis: carrying out the parameter sensitivity analysis according to the parameter sensitivity analysis method of Technical Guidelines for Risk Assessment of Soil Contamination of Land for Construction (HJ25.3-2019), in the possible value range of the parameter, changing 10% of one parameter value, keeping unchanged of other parameters, and then analyzing the influence of the changed parameters on the risk assessment calculation result, as shown in FIG 8, wherein the character meaning in the table is as follows: RCV1: carcinogenic risk control value; RCV2: nononcogenic risk control value. Table 8: parameter sensitivity analysis of risk assessment model Name Meaning Unit Value RCV1 RCV2 Outdoor exposure EFOal frequency in the d/a 62.5 -91% -91% mining area Outdoor exposure EFOaz lrequency of d'a 87.5 -91% -91% peripheral residential area Daily exposure time in T1 . h 1.5 -91% -91% the mining area Daily exposure time T2 outside the mining h 1.0 -91% -91% area [URI Adult unit inhalation = Dimensi 0.065 91% 91% risk onless IUR2 Children unit Dimensi 0045 91% 91% inhalation risk onless Rfc Respiratory intake fice 0.00009 0 100% 12

Claims

Claims LU502325 WHAT IS CLAIMED IS:

1. A system for assessing health risk in an asbestos mining area, comprising an information collection layer for carrying out environmental survey on the potential asbestos pollution situation in an asbestos production area to be assessed and a surrounding area range, and an information assessment layer for carrying out the risk assessment on the survey result of the information collection layer; wherein the information collection layer comprises a data collection unit for collecting the relevant report and literature in the asbestos production area and a field survey unit for carrying out the field layout and sampling on the asbestos production area and the surrounding area range; the field survey unit comprises an exploration unit for exploring the asbestos production area and the surrounding area range, a visiting unit for carrying out personnel interviewing in the asbestos production area and the surrounding area range and a sampling unit for carrying out field sampling and analysis on the asbestos production area and the surrounding area range; and the information assessment layer is an asbestos risk assessment unit for assessing the asbestos human health risk.

2. The method for assessing health risk in an asbestos mining area according to claim 1, wherein the method comprises the steps of: S1: collecting information S1-1: collecting data collecting the information relevant to the asbestos production area and the survey area through the ways of historical data collation and analysis, personnel interview, field exploration and visit; S1-2: field sampling and exploring: organizing personnel to preliminarily identify the plot pollution through the ways 13 of field exploration and personnel interview, wherein the range of the field exploration LUS02325 is the asbestos production area and the potential surrounding influence area, and the field exploration mainly comprises the current situation, history, hydrogeology, landform and structures of the plot and the surrounding area, description of a facility and equipment, and preliminary identification of the field pollution;

S1-3: plot sampling and detection analysis arranging points for the environment air in the whole survey area for monitoring, and carrying out field sampling and laboratory analysis;

S2: assessment of asbestos human health risk

S2-1: identifying asbestos harm

S2-1-1: screening the risk assessment and paying attention to a pollutant-asbestos fiber;

S2-1-2: establishing a conceptual model according to the land use way in the plot and the surrounding area, and clearing a possible exposure pathway;

S2-1-3: identifying and concerning the toxicity hazard of the pollutant on human;

S2-2: asbestos exposure assessment,

determining or assessing the frequency, period, exposure pathway and exposure quantity of the human exposed in the pollutant;

S2-3: asbestos toxicity assessment,

obtaining human carcinogenic and nononcogenic toxic parameters concerning the pollutant, and supporting the calculation of the carcinogenic and nononcogenic risk;

S2-4: asbestos risk representation integrating all information according to the results of the exposure assessment and the toxicity assessment, and describing the risk in a quantitative way, wherein the

14 nononcogenic risk is described in a manner of hazard quotient; and for the potential LUS02325 carcinogenic risk, the possible carcinogenic risk level of a receptor is assessed by adopting an excessive lifelong cancer risk according to the asbestos content; S2-5: uncertainty analysis carrying out sensitivity analysis on the plot parameters, screening and mastering the parameters with great influence on the risk assessment result, and then analyzing the source of these parameters; and S2-6: confirming a risk control value calculating a super-risk control value of the asbestos in the air according to the model, and finally confirming the risk control value of the asbestos in the air under the different land use ways, and taking the risk control value as the basis for the later risk control.

3. The method for assessing health risk in an asbestos mining area according to claim 2, wherein the information of S1-1 relevant to the survey area of the asbestos production area specifically comprises area generalization, enterprise information review in the plot, a plot use history and current situation, plot environment pollution identification and a sensitive target.

4. The method for assessing health risk in an asbestos mining area according to claim 3, wherein the area generalization comprises geographical location information, landform information, meteorological and hydrological information, area geology generalization information, orebody characteristics information, hydrogeological condition information, ecologic environment status survey information and social-economic information in the asbestos production area.

5. The method for assessing health risk in an asbestos mining area according to claim 3, wherein the enterprise information review in the plot is specifically a mining method, a production process and a potential pollution situation of the enterprise.

6. The method for assessing health risk in an asbestos mining area according to LUS02325 claim 3, wherein the sensitive target is specifically a residential area, a lake and a reservoir, a scenic spot and a historical site, a natural reserve, a geological relic, a geological park and a scenic spot in the survey area.

7. The method for assessing health risk in an asbestos mining area according to claim 2, wherein the plot survey and detection analysis in S1-3 specifically comprises the steps of: S1-3-1: collecting an environment air sample arranging a plurality of environment air sample collection points in the whole survey area for air collection and field record, wherein the air sample collection points are distributed in a mining office area, a living quarter, near a dressing plant, a slag heap and other areas with human activities; and S1-3-2: sample analysis carrying out laboratory analysis for the air sample collected in S1-3-1.

8. The method for assessing health risk in an asbestos mining area according to claim 2, wherein in S2-4, respectively calculating the risk of each exposure pathway according to the carcinogenic calculation method, and finally calculating the total carcinogenic risk by adopting an addition method; calculating the carcinogenic risk according to the formula ELCR=EPC-TWF-IUR, wherein ELCR represents an excessive lifelong cancer risk; EPC represents an exposure concentration, an asbestos fiber concentration in the air under a specific activity condition, TWF represents a time weighting factor, specifically a discontinuous cumulative exposure quantity within one year; and IUR represents a unit inhalation risk; calculating the nononcogenic hazard quotient according to the formula HQ=EPC-TWF/Rfc, wherein HQ represents a nononcogenic hazard quotient; EPC represents an exposure concentration, an asbestos fiber concentration in the air under a 16 specific activity condition, TWF represents a time weighting factor; and Rfc represents LUS02325 a reference intake concentration; and calculating the time weighting factor according to the formula TWF=Exposure time(hours exposed/day)/24- Exposure frequency(days/vear)/365.

9. The method for assessing health risk in an asbestos mining area according to claim 2, wherein the parameter sensitivity analysis in S2-5 is carried out according to the parameter sensitivity analysis method of 7echnical Guidelines for Risk Assessment of Soil Contamination of Land for Construction (HJ25.3-2019), in the possible value range of the parameter, 10% of one parameter value is changed, other parameters are kept unchanged, and then the influence of the changed parameters on the risk assessment calculation result is analyzed.

17