CN101982823A - Risk assessment system of soil heavy metal pollution on human health - Google Patents

Abstract

The invention relates to the technical field of environmental pollution evaluation, in particular to a risk assessment system of soil heavy metal pollution on human health, which can automatically assess the risk of the soil heavy metal pollution on the human health, save assessment time and improve assessment precision, and comprises a storage module, an input module and a heavy metal pollution risk evaluation module, wherein the storage module is used for storing parameters of physical and chemical properties and toxicological information of various soil heavy metal pollutants; the input module is used for inputting the types of the soil heavy metal pollutants of a region to be assessed, the ambient concentration and human health risk assessment parameters; and the heavy metal pollution risk evaluation module comprises a carcinogenic risk evaluation module, a non-carcinogenic risk evaluation module and a pollution risk level evaluation module, and is used for evaluating carcinogenic risk, non-carcinogenic risk and pollution risk level according to the types of the soil heavy metal pollutants, the ambient concentration and the human health risk assessment parameters.

Description

Heavy metal pollution of soil is to the human healthy risk assessment system

Technical field

The present invention relates to environmental pollution assessment technique field, be specifically related to a kind of heavy metal pollution of soil the human healthy risk assessment system.

Background technology

Soil is one of the mankind's main natural resources of depending on for existence, also is the important component part of human ecological environment.Along with the increase of industry, the aggravation of municipal pollution and agrochemicals kind, quantity, heavy metal pollution of soil is serious day by day.Heavy metal pollution of soil has the pollutant characteristics that poor mobility, hold-up time are grown, can not be degraded by microorganisms in soil, and can finally influence human health through media such as water, plants.

The heavy metal pollution of soil owner will be based on chromium, cadmium, zinc, lead, mercury, arsenic, nickel and compound thereof, and approach such as the heavy metal pollution of soil thing can be taken in by alimentary canal, respiratory tract suction, skin absorption enter human body.

After heavy metal contaminants enters human body, can cause headache, dizziness, insomnia, forgetful, refreshing smart entanglement, arthralgia, calculus, cancer (as liver cancer, cancer of the stomach, intestinal cancer, carcinoma of urinary bladder, breast cancer, prostate cancer and Blackfoot Disease and deformed child) of people etc.; Especially cell, internal organs, skin, bone, refreshing smart destruction the to digestive system, urinary system reaches to serious.

Heavy metal pollution of soil does not have robotization, incorporate evaluating system to the risk of health at present, needs multiple instrument and equipment to carry out complicated processing, and workload is big, and computational accuracy is limited.

Summary of the invention

The object of the present invention is to provide a kind of heavy metal pollution of soil to the human healthy risk assessment system, can automatically heavy metal pollution of soil be assessed the risk of health, save the evaluation time, improve the assessment precision according to the input data.

The objective of the invention is to be achieved through the following technical solutions: heavy metal pollution of soil comprises the human healthy risk assessment system

Memory module is in order to the physicochemical property parameter and the toxicity data of storing various heavy metal pollution of soil things;

Load module is in order to heavy metal pollution of soil species, ambient concentration and the human healthy risk assessment's parameter of importing zone to be assessed;

Heavy metal pollution risk assessment module, comprise carcinogenic risk evaluation module, non-carcinogenic risk assessment module and pollution risk level evaluation module, in order to according to heavy metal pollution of soil species, ambient concentration and human healthy risk assessment's parameter evaluation carcinogenic risk, non-carcinogenic risk and pollution risk rank.

Further, the physicochemical property parameter of described heavy metal pollution of soil thing comprises cas number, molecular weight, density, vapour pressure, solubleness, Henry's constant, the coefficient of diffusion of heavy metal contaminants;

Further, described heavy metal pollution of soil thing comprises chromium, cadmium, zinc, lead, mercury, arsenic, nickel and compound thereof;

Further, described human healthy risk assessment's parameter comprises the human body average weight, every day average amount of drinking water, the human body exposed area, the dermal osmosis coefficient, breathe during shower, the shower time, the soil uptake rate, the soil pollution ratio, skin is to the adsorption rate of soil, compound is absorbed ratio, mean wind speed, inhalation rate, diffusion breadth, pollution source top air mixed height, the outer gas dosing of suction chamber every day, human body sucks particulate speed, airborne dust loss speed frequency, the soil uptake rate, through take in soil contaminated ratio, degree of absorption in the human body body, soil is to the absorptivity of skin, the absorbed ratio of compound, every day, skin exposed the ratio of soil;

Further, described carcinogenic risk evaluation module is used to obtain the carcinogenic risk R of heavy metal contaminants _Total:

R _total＝∑R _oral+∑R _inh+∑R _dermal；

Wherein: R _Oral=(Intake _Oral-water+ Intake _Oral-soil) * SF _Oral

Wherein: R _Oral---via the carcinogenic risk of oral absorption route of exposure;

Intake _Oral-water---per kilogram absorbs the reconditioning (mg/kg/d) of responsive pollutant via drinking underground water for each person every day, calculates by following formula:

${\mathrm{Intake}}_{\mathrm{oral}-\mathrm{water}}=\frac{\mathrm{bi}\×\mathrm{IR}\×C_W}{\mathrm{BW}};$

Wherein

IR---average amount of drinking water every day (L/d);

C _w---the pollutant levels in the underground water of drinking (mg/L);

BW---human body average weight (kg);

Calculate with conservative value 100% in bi---the absorption of human body degree, this program;

Intake _Oral-soil---per kilogram absorbs the reconditioning (mg/kg/d) of responsive pollutant via eating soil by mistake for each person every day, calculates by following formula:

${\mathrm{Intake}}_{\mathrm{oral}-\mathrm{soil}}=\frac{{10}^{-6}\×b_s\×C_s\×\mathrm{IR}\×\mathrm{FI}}{\mathrm{BW}};$

Wherein

C _s---pollutant is concentration (mg/kg) in soil;

IR---soil uptake rate (mg/d);

FI---always take in soil contaminated ratio (mg/mg);

BW---body weight for humans (kg);

10 ^-6---unit conversion (kg/mg);

b _s---degree of absorption (mg/mg) in the human body body;

SF _Oral---via the carcinogenic slope (different pollutants has different numerical value, mainly is with reference to Environmental Protection Agency risk Information System and World chemical security document storehouse) of the responsive pollutant of oral absorption.

R _inh＝(Intake _{inh-water(total)}+Intake _{inh-soil(total)})×SF _inh；

Wherein

R _Inh---via sucking the carcinogenic risk that absorbs route of exposure;

Intake _{Inh-water (total)}---average in life per kilogram for each person every day calculates by following formula via the reconditioning that sucks the responsive pollutant that absorbs the underground water steam:

${\mathrm{Intake}}_{\mathrm{inh}-\mathrm{water}\left(\mathrm{total}\right)}=\frac{b_{\mathrm{sh}}\×\mathrm{IH}\×C_{\mathrm{sh}}\×\mathrm{ET}}{\mathrm{BW}};$

Wherein

Intake _{Inh-water (total)}---during shower, intake every day (mg/kg/d) that pollutant sucks through air and by human body;

IH---respiratory capacity (m during shower ³/ hr);

C _Sh---" evaporation " pollutant levels (mg/m in air during shower ³);

ET---the shower time (hr/day);

BW---body weight for humans (kg);

b _Sh---degree of absorption (mg/mg) in the human body body;

Intake _{Inh-soil (total)}---average in life per kilogram for each person every day is via the reconditioning that sucks the responsive pollutant that absorbs soil airborne dust and steam,

Acceptor enters human body intake every day, computing formula through " the outer gas of suction chamber ":

${\mathrm{Intake}}_{\mathrm{inh}-\mathrm{soil}\left(\mathrm{total}\right)}=\frac{b_a\×c_a\×\mathrm{IH}\×\mathrm{ET}}{\mathrm{BW}};$

Wherein

Intake _{Inh-soil (total)}---the outer gas absorption dosage (mg/kg/d) of suction chamber every day;

Ca---pollutant is at atmospheric concentration (mg/m ³);

IH---inhalation rate (m ³/ hr);

ET---exposure duration (hr/day);

BW---body weight for humans (kg);

Ba---at sucking degree of absorption (mg/mg) in the human body body;

SF _Inh---via sucking the carcinogenic slope (different pollutants has different numerical value, mainly is with reference to Environmental Protection Agency risk Information System and World chemical security document storehouse) that absorbs responsive pollutant;

R _dermal＝(Intake _dermal-water+Intake _dermal-soil)×SF _dermal；

Wherein

R _Dermal---absorb the carcinogenic risk of route of exposure via the skin contact;

Intake _Dermal-water---average in life per kilogram for each person every day calculates by following formula via the reconditioning of responsive pollutant in the skin contact absorption underground water:

${\mathrm{Intake}}_{\mathrm{dcrmal}-\mathrm{watcr}}=\frac{{10}^{-3}\×C_W\×\mathrm{SA}\×\mathrm{PC}\×\mathrm{ET}}{\mathrm{BW}};$

Wherein

Intake _Dermal-water---uptake every day (mg/kg/d) that enters human body through " skin contact " during shower;

C _w---pollutant levels (mg/L) in underground water during shower;

The total area (the cm that SA---skin exposes ²);

PC---pollutant enters skin " dermal osmosis coefficient " (cm/hr);

ET---the shower time (hr/day);

BW---body weight for humans (kg);

10 ^-3---unit conversion (L/cm ³);

Intake _Dermal-soil---average in life per kilogram for each person every day absorbs the reconditioning (lifetime average daily dose) of responsive pollutant in the soil via the skin contact

${\mathrm{Intake}}_{\mathrm{dermal}-\mathrm{soil}}=\frac{{10}^{-6}\×C_s\×\mathrm{SA}\×\mathrm{AF}\×\mathrm{ABS}}{\mathrm{BW}};$

Wherein

Intake _Dermal-soil---skin exposure dose (mg/kg/d);

C _s---pollutant levels in contaminated soil (mg/kg);

SA---every day, skin exposed the soil total area (cm to the open air ²/ d);

AF---soil is to skin adsorption rate (mg/cm ²);

ABS---compound is absorbed ratio (mg/kg);

BW---body weight for humans (kg);

10 ^-6---unit conversion (kg/mg);

SF _Dermal---absorb the carcinogenic slope (SF of responsive pollutant via the skin contact _DermalWith SF _OralFollowing reduction formula: SF is arranged _Dermal=SF _Oral/ ABS _GI

ABS _GI---alimentary canal absorbs and divides rate; Divide rate more than or equal to 0.5 o'clock if alimentary canal absorbs, then can exempt the process of conversion, directly the virulence factor with oral absorption is the virulence factor of skin contact absorption;

Further, described non-carcinogenic risk assessment module is used to obtain the non-carcinogenic risk HI of heavy metal contaminants:

HI＝∑HQ _oral+∑HQ _inh+∑HQ _dermal；

Wherein

HQ _oral＝(Intake _oral-water+Intake _oral-soil)/RfD _oral；

Wherein

HQ _Oral---the non-carcinogenic risk of oral absorption route of exposure;

Intake _Oral-water---average in life per kilogram for each person every day absorbs the reconditioning (lifetime average daily dose) of responsive pollutant route of exposure via drinking underground water;

Intake _Oral-soil---average in life per kilogram for each person every day is via eating the reconditioning (lifetime average daily dose) that soil absorbs responsive pollutant route of exposure by mistake;

RfD _Oral---the reference dose of the oral absorption of a certain non-carcinogenic thing;

HQ _inh＝(Intake _{inh-soil(total)}+Intake _{inh-water(total)})/RfD _inh；

Wherein

HQ _Inh---absorb the non-carcinogenic risk that sucks route of exposure;

Intake _{Inh-soil (total)}---average in life per kilogram for each person every day is via the reconditioning (lifetime average daily dose) that sucks the responsive pollutant that absorbs underground water steam;

Intake _{Inh-water (total)}---average in life per kilogram for each person every day comprises Intake via the reconditioning that sucks the responsive pollutant that absorbs soil airborne dust and steam _{Inh-soil (upper)}, Intake _{Inh-soil (inner)}And Intake _Inh-soil

RfD _Inh---the reference dose of the suction absorption of a certain non-carcinogenic thing;

HQ _dermal＝(Intake _dermal-water+Intake _dermal-soil)/RfD _dermal；

Wherein

HQ _Dermal---the non-carcinogenic risk of skin contact route of exposure;

Intake _Dermal-warer---average in life per kilogram for each person every day absorbs the reconditioning (lifetime average daily dose) of responsive pollutant via skin contact underground water;

Intake _Dermal-soil---average in life per kilogram for each person every day absorbs the reconditioning (lifetime average daily dose) of responsive pollutant via skin contact soil;

RfD _Dermal---the skin contact of a certain non-carcinogenic thing absorbs reference dose;

Further, described pollution risk level evaluation module is estimated the pollution risk rank by following formula:

R _accumulate＝(1+X) ⁿ×R；

Wherein

X---be build up factor, the annual percentage amounts that increases of this heavy metal species;

R---be the content of the heavy metal in the standard year soil;

N---for being starting point with the standard year, the year number of experience;

This value-at-risk (R _Accumulate) be the value-at-risk of having considered this heavy metal species of obtaining after the heavy metal cumulative effect;

Further, also comprise an alarm module, the total carcinogenic risk value that draws when the carcinogenic risk evaluation module is during greater than 10-6, or non-total carcinogenic risk value that non-carcinogenic risk assessment module draws gave a warning greater than 1 o'clock.

The present invention can calculate selected pollutant, and to its assessment that risk of health is quantized, display result uses instrument few intuitively, assesses the precision height, has reduced staff's labor capacity.

Description of drawings

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing:

Fig. 1 shows heavy metal pollution of soil to human healthy risk assessment's system architecture synoptic diagram.

Embodiment

The present invention will be further described below in conjunction with accompanying drawing.

Referring to Fig. 1, heavy metal pollution of soil comprises memory module, load module, heavy metal pollution risk assessment module, alarm module to the human healthy risk assessment system;

Memory module, select the SQL Server2005 data base administration of Microsoft for use, in order to the physicochemical property parameter and the toxicity data of storing various heavy metal pollution of soil things, comprise cas number (Chemical Abstracts Service U.S. chemical abstract is served society--be the registration number that chemical substance is worked out), molecular weight, density, vapour pressure, solubleness, Henry's constant, the coefficient of diffusion of chromium, cadmium, zinc, lead, mercury, arsenic, nickel and compound thereof;

Load module, in order to import the heavy metal pollution of soil species in zone to be assessed, ambient concentration and human healthy risk assessment's parameter, described human healthy risk assessment's parameter comprises the human body average weight, every day average amount of drinking water, the human body exposed area, the dermal osmosis coefficient, breathe during shower, the shower time, the soil uptake rate, the soil pollution ratio, skin is to the adsorption rate of soil, compound is absorbed ratio, mean wind speed, inhalation rate, diffusion breadth, pollution source top air mixed height, the outer gas dosing of suction chamber every day, human body sucks particulate speed, airborne dust loss speed frequency, the soil uptake rate, through take in soil contaminated ratio, degree of absorption in the human body body, soil is to the absorptivity of skin, the absorbed ratio of compound, every day, skin exposed the ratio of soil;

Heavy metal pollution risk assessment module, comprise carcinogenic risk evaluation module, non-carcinogenic risk assessment module and pollution risk level evaluation module, in order to according to heavy metal pollution of soil species, ambient concentration and human healthy risk assessment's parameter evaluation carcinogenic risk, non-carcinogenic risk and pollution risk level, and with histogram or the output of other form.

Described carcinogenic risk evaluation module is used to obtain the carcinogenic risk R of heavy metal contaminants _Total:

R _total＝∑R _oral+∑R _inh+∑R _dermal；

Wherein: R _Oral=(Intake _Oral-water+ Intake _Oral-soil) * SF _Oral

Wherein: R _Oral---via the carcinogenic risk of oral absorption route of exposure;

Intake _Oral-water---per kilogram absorbs the reconditioning (mg/kg/d) of responsive pollutant via drinking underground water for each person every day, calculates by following formula:

${\mathrm{Intake}}_{\mathrm{oral}-\mathrm{water}}-\frac{\mathrm{bi}\×\mathrm{IR}\×C_W}{\mathrm{BW}};$

Wherein

IR---average amount of drinking water every day (L/d);

C _w---the pollutant levels in the underground water of drinking (mg/L);

BW---human body average weight (kg);

Calculate with conservative value 100% in bi---the absorption of human body degree, this program;

Intake _Oral-soil---per kilogram absorbs the reconditioning (mg/kg/d) of responsive pollutant via eating soil by mistake for each person every day, calculates by following formula:

${\mathrm{Intake}}_{\mathrm{oral}-\mathrm{soil}}=\frac{{10}^{-6}\×b_s\×C_s\×\mathrm{IR}\×\mathrm{FI}}{\mathrm{BW}};$

Wherein

C _s---pollutant is concentration (mg/kg) in soil;

IR---soil uptake rate (mg/d);

FI---always take in soil contaminated ratio (mg/mg);

BW---body weight for humans (kg);

10 ^-6---unit conversion (kg/mg);

b _s---degree of absorption (mg/mg) in the human body body;

SF _Oral---via the carcinogenic slope of the responsive pollutant of oral absorption;

R _inh＝(Intake _{inh-water(total)}+Intake _{inh-soil(total)})×SF _inh

Wherein

R _Inh---via sucking the carcinogenic risk that absorbs route of exposure

Intake _{Inh-water (total)}---average in life per kilogram for each person every day calculates by following formula via the reconditioning that sucks the responsive pollutant that absorbs the underground water steam:

${\mathrm{Intake}}_{\mathrm{inh}-\mathrm{water}\left(\mathrm{total}\right)}=\frac{b_{\mathrm{sh}}\×\mathrm{IH}\×C_{\mathrm{sh}}\×\mathrm{ET}}{\mathrm{BW}};$

Wherein

Intake _{Inh-water (total)}---during shower, intake every day (mg/kg/d) that pollutant sucks through air and by human body;

IH---respiratory capacity (m during shower ³/ hr);

C _Sh---" evaporation " pollutant levels (mg/m in air during shower ³);

ET---the shower time (hr/day);

BW-body weight for humans (kg);

b _Sh---degree of absorption (mg/mg) in the human body body;

Intake _{Inh-soil (total)}---average in life per kilogram for each person every day is via the reconditioning that sucks the responsive pollutant that absorbs soil airborne dust and steam,

Acceptor enters human body intake every day, computing formula through " the outer gas of suction chamber ":

${\mathrm{Intake}}_{\mathrm{inh}-\mathrm{soil}\left(\mathrm{total}\right)}=\frac{b_a\×c_a\×\mathrm{IH}\×\mathrm{ET}}{\mathrm{BW}};$

Wherein

Intake _{Inh-soil (total)}---the outer gas absorption dosage (mg/kg/d) of suction chamber every day;

C _a---pollutant is at atmospheric concentration (mg/m ³);

IH---inhalation rate (m ³/ hr);

ET---exposure duration (hr/day);

BW---body weight for humans (kg);

b _a---at sucking degree of absorption (mg/mg) in the human body body;

SF _Inh---via sucking the carcinogenic slope that absorbs responsive pollutant;

R _dermal＝(Intake _dermal-water+Intake _dermal-soil)×SF _dermal；

Wherein

R _Dermal---absorb the carcinogenic risk of route of exposure via the skin contact;

Intake _Dermal-water---average in life per kilogram for each person every day calculates by following formula via the reconditioning of responsive pollutant in the skin contact absorption underground water:

${\mathrm{Intake}}_{\mathrm{dermal}-\mathrm{watcr}}=\frac{{10}^{-3}\×C_W\×\mathrm{SA}\×\mathrm{PC}\×\mathrm{ET}}{\mathrm{BW}};$

Wherein

Intake _Dermal-water---uptake every day (mg/kg/d) that enters human body through " skin contact " during shower;

C _w---pollutant levels (mg/L) in underground water during shower;

The total area (the cm that SA---skin exposes ²);

PC---pollutant enters skin " dermal osmosis coefficient " (cm/hr);

ET---the shower time (hr/day);

BW---body weight for humans (kg);

10 ^-3---unit conversion (L/cm ³);

Intake _Dermal-soil---average in life per kilogram for each person every day absorbs the reconditioning (lifetime average daily dose) of responsive pollutant in the soil via the skin contact

${\mathrm{Intake}}_{\mathrm{dermal}-\mathrm{soil}}=\frac{{10}^{-6}\×C_s\×\mathrm{SA}\×\mathrm{AF}\×\mathrm{ABS}}{\mathrm{BW}};$

Wherein

Intake _Dermal-soil---skin exposure dose (mg/kg/d);

C _s---pollutant levels in contaminated soil (mg/kg);

SA---every day, skin exposed the soil total area (cm to the open air ²/ d);

AF---soil is to skin adsorption rate (mg/cm ²);

ABS---compound is absorbed ratio (mg/kg);

BW---body weight for humans (kg);

10 ^-6---unit conversion (kg/mg);

SF _Dermal---absorb the carcinogenic slope of responsive pollutant via the skin contact;

Described non-carcinogenic risk assessment module is used to obtain the non-carcinogenic risk HI of heavy metal contaminants:

HI＝∑HQ _oral+∑HQ _inh+∑HQ _dermal；

Wherein

HQ _oral＝(Intake _oral-water+Intake _oral-soil)/RfD _oral；

Wherein

HQ _Oral---the non-carcinogenic risk of oral absorption route of exposure;

Intake _Oral-water---average in life per kilogram for each person every day absorbs the reconditioning (lifetime average daily dose) of responsive pollutant route of exposure via drinking underground water;

Intake _Oral-soil---average in life per kilogram for each person every day is via eating the reconditioning (lifetime average daily dose) that soil absorbs responsive pollutant route of exposure by mistake;

RfD _Oral---the reference dose of the oral absorption of a certain non-carcinogenic thing;

HQ _inh＝(Intake _{inh-soil(total)}+Intake _{inh-water(total)})/RfD _inh

Wherein

HQ _Inh---absorb the non-carcinogenic risk that sucks route of exposure;

Intake _{Inh-soil (total)}---average in life per kilogram for each person every day is via the reconditioning (lifetime average daily dose) that sucks the responsive pollutant that absorbs underground water steam;

Intake _{Inh-water (total)}---average in life per kilogram for each person every day comprises Intake via the reconditioning that sucks the responsive pollutant that absorbs soil airborne dust and steam _{Inh-soil (upper)}, Intake _{Inh-soil (inner)}And Intake _Inh-soil

RfD _Inh---the reference dose of the suction absorption of a certain non-carcinogenic thing;

HQ _dermal＝(Intake _dermal-water+Intake _dermal-soil)/RfD _dermal；

Wherein

HQ _Dermal---the non-carcinogenic risk of skin contact route of exposure;

Intake _Dermal-water---average in life per kilogram for each person every day absorbs the reconditioning (lifetime average daily dose) of responsive pollutant via skin contact underground water;

Intake _Dermal-soil---average in life per kilogram for each person every day absorbs the reconditioning (lifetime average daily dose) of responsive pollutant via skin contact soil;

RfD _Dermal---the skin contact of a certain non-carcinogenic thing absorbs reference dose;

Described pollution risk level evaluation module is estimated the pollution risk rank by following formula:

R _accumulate＝(1+X) ⁿ×R；

Wherein

X---be build up factor, the annual percentage amounts that increases of this heavy metal species;

R---be the content of the heavy metal in the standard year soil;

N---for being starting point with the standard year, the year number of experience;

This value-at-risk (R _Accumulatc) be the value-at-risk of having considered this heavy metal species of obtaining after the heavy metal cumulative effect;

Alarm module, the total carcinogenic risk value that draws when the carcinogenic risk evaluation module is greater than 10 ^-6The time, or non-total carcinogenic risk value that non-carcinogenic risk assessment module draws gave a warning greater than 1 o'clock.

Claims (8)

1. heavy metal pollution of soil is characterized in that the human healthy risk assessment system: comprise

Memory module is in order to the physicochemical property parameter and the toxicity data of storing various heavy metal pollution of soil things;

Load module is in order to heavy metal pollution of soil species, ambient concentration and the human healthy risk assessment's parameter of importing zone to be assessed;

Heavy metal pollution risk assessment module, comprise carcinogenic risk evaluation module, non-carcinogenic risk assessment module and pollution risk level evaluation module, in order to according to heavy metal pollution of soil species, ambient concentration and human healthy risk assessment's parameter evaluation carcinogenic risk, non-carcinogenic risk and pollution risk rank.

2. heavy metal pollution of soil as claimed in claim 1 is characterized in that the human healthy risk assessment system: the physicochemical property parameter of described heavy metal pollution of soil thing comprises cas number, molecular weight, density, vapour pressure, solubleness, Henry's constant, the coefficient of diffusion of heavy metal contaminants.

3. heavy metal pollution of soil as claimed in claim 1 or 2 is characterized in that the human healthy risk assessment system: described heavy metal pollution of soil thing comprises chromium, cadmium, zinc, lead, mercury, arsenic, nickel and compound thereof.

4. heavy metal pollution of soil as claimed in claim 3 is characterized in that the human healthy risk assessment system: described human healthy risk assessment's parameter comprises the human body average weight, every day average amount of drinking water, the human body exposed area, the dermal osmosis coefficient, breathe during shower, the shower time, the soil uptake rate, the soil pollution ratio, skin is to the adsorption rate of soil, compound is absorbed ratio, mean wind speed, inhalation rate, diffusion breadth, pollution source top air mixed height, the outer gas dosing of suction chamber every day, human body sucks particulate speed, airborne dust loss speed frequency, the soil uptake rate, through take in soil contaminated ratio, degree of absorption in the human body body, soil is to the absorptivity of skin, the ratio of absorbed ratio of compound and skin exposure every day soil.

5. heavy metal pollution of soil as claimed in claim 4 is characterized in that the human healthy risk assessment system: described carcinogenic risk evaluation module is used to obtain the carcinogenic risk R of heavy metal contaminants _Total:

R _total＝∑R _oral+∑R _inh+∑R _dermal；

Wherein: R _Oral=(Intake _Oral-water+ Intake _Oral-soil) * SF _Oral

Wherein: R _Oral---via the carcinogenic risk of oral absorption route of exposure

Intake _Oral-water---per kilogram absorbs the reconditioning (mg/kg/d) of responsive pollutant via drinking underground water for each person every day, calculates by following formula:

${\mathrm{Intake}}_{\mathrm{oral}-\mathrm{water}}=\frac{\mathrm{bi}\×\mathrm{IR}\×C_W}{\mathrm{BW}};$

Wherein:

IR---every day average amount of drinking water;

C _w---the pollutant levels in the underground water of drinking;

BW---human body average weight;

Calculate with conservative value 100% in bi---the absorption of human body degree, this program;

Intake _Oral-soil---per kilogram absorbs the reconditioning (mg/kg/d) of responsive pollutant via eating soil by mistake for each person every day, calculates by following formula:

${\mathrm{Intake}}_{\mathrm{oral}-\mathrm{soil}}=\frac{{10}^{-6}\×b_s\×C_s\×\mathrm{IR}\×\mathrm{FI}}{\mathrm{BW}};$

Wherein:

C _s---pollutant is concentration in soil;

IR---soil uptake rate;

FI---always take in soil contaminated ratio;

BW---body weight for humans;

10 ^-6---unit conversion;

b _s---degree of absorption in the human body body;

SF _Oral---via the carcinogenic slope of the responsive pollutant of oral absorption;

R _inh＝(Intake _{inh-water(total)}+Intake _{inh-soil(total)})×SF _inh；

Wherein:

R _Inh---via sucking the carcinogenic risk that absorbs route of exposure

Intake _{Inh-water (total)}---average in life per kilogram for each person every day calculates by following formula via the reconditioning that sucks the responsive pollutant that absorbs the underground water steam:

${\mathrm{Intake}}_{\mathrm{inh}-\mathrm{water}\left(\mathrm{total}\right)}=\frac{b_{\mathrm{sh}}\×\mathrm{IH}\×C_{\mathrm{sh}}\×\mathrm{ET}}{\mathrm{BW}}$

Wherein

Intake _{Inh-water (total)}---during shower, intake every day (mg/kg/d) that pollutant sucks through air and by human body;

IH---respiratory capacity during shower;

C _Sh---" evaporation " pollutant levels in air during shower;

ET---the shower time;

BW---body weight for humans;

b _Sh---degree of absorption in the human body body;

Intake _{Inh-soil (total)}---average in life per kilogram for each person every day is via the reconditioning that sucks the responsive pollutant that absorbs soil airborne dust and steam, computing formula:

${\mathrm{Intake}}_{\mathrm{inh}-\mathrm{soil}\left(\mathrm{total}\right)}=\frac{b_a\×c_a\×\mathrm{IH}\×\mathrm{ET}}{\mathrm{BW}};$

Wherein

Intake _{Inh-soil (total)}---the outer gas absorption dosage of suction chamber every day;

C _a---pollutant is in atmospheric concentration;

IH---inhalation rate;

ET-exposure duration;

BW---body weight for humans;

b _a---pollutant sucks degree of absorption in the human body body;

SF _Inh---via sucking the carcinogenic slope that absorbs responsive pollutant;

R _dermal＝(Intake _dermal-water+Intake _dermal-soil)×SF _dermal

Wherein

R _Dermal---absorb the carcinogenic risk of route of exposure via the skin contact

Intake _Dermal-water---average in life per kilogram for each person every day calculates by following formula via the reconditioning of responsive pollutant in the skin contact absorption underground water:

${\mathrm{Intake}}_{\mathrm{dermal}-\mathrm{water}}=\frac{{10}^{-3}\×C_W\×\mathrm{SA}\×\mathrm{PC}\×\mathrm{ET}}{\mathrm{BW}};$

Wherein

Intake _Dermal-water---uptake every day that enters human body through " skin contact " during shower;

C _w---pollutant levels in underground water during shower;

The total area that SA---skin exposes;

PC---pollutant enters the dermal osmosis coefficient of skin;

ET---the shower time;

BW---body weight for humans;

10 ^-3---unit conversion;

Intake _Dermal-soil---average in life per kilogram for each person every day absorbs the reconditioning of responsive pollutant in the soil via the skin contact:

${\mathrm{Intake}}_{\mathrm{dermal}-\mathrm{soil}}=\frac{{10}^{-6}\×C_s\×\mathrm{SA}\×\mathrm{AF}\×\mathrm{ABS}}{\mathrm{BW}};$

Wherein

Intake _Dermal-soil---the skin exposure dose;

C _s---pollutant levels in contaminated soil;

SA---every day, skin exposed the soil total area to the open air;

AF---soil is to the skin adsorption rate;

ABS---compound is absorbed ratio;

BW---body weight for humans;

10 ^-6---unit conversion;

SF _Dermal---via the carcinogenic slope of the responsive pollutant of skin contact absorption, SF _Dermal=SF _Oral/ ABS _GI

ABS _GI---alimentary canal absorbs and divides rate; Divide rate more than or equal to 0.5 o'clock if alimentary canal absorbs, then can exempt the process of conversion, directly the virulence factor with oral absorption is the virulence factor of skin contact absorption.

6. heavy metal pollution of soil as claimed in claim 5 is characterized in that the human healthy risk assessment system: described non-carcinogenic risk assessment module is used to obtain the non-carcinogenic risk HI of heavy metal contaminants:

HI＝∑HQ _oral+∑HQ _inh+∑HQ _dermal

Wherein

HQ _oral＝(Intake _oral-water+Intake _oral-soil)/RfD _oral；

Wherein

HQ _Oral---the non-carcinogenic risk of oral absorption route of exposure;

Intake _Oral-water---average in life per kilogram for each person every day absorbs the reconditioning of responsive pollutant route of exposure via drinking underground water;

Intake _Oral-soil---average in life per kilogram for each person every day is via eating the reconditioning that soil absorbs responsive pollutant route of exposure by mistake;

RfD _Oral---the reference dose of the oral absorption of a certain non-carcinogenic thing;

HQ _inh＝(Intake _{inh-soil(total)}+Intake _{inh-water(total)})/RfD _inh；

Wherein

HQ _Inh---absorb the non-carcinogenic risk that sucks route of exposure;

Intake _{Inh-soil (total)}---average in life per kilogram for each person every day is via the reconditioning that sucks the responsive pollutant that absorbs underground water steam;

Intake _{Inh-water (total)}---average in life per kilogram for each person every day comprises Intake via the reconditioning that sucks the responsive pollutant that absorbs soil airborne dust and steam _{Inh-soil (upper)}, Intake _{Inh-soil (inner)}And Intake _Inh-soil

RfD _Inh---the reference dose of the suction absorption of a certain non-carcinogenic thing

HQ _dermal＝(Intake _dermal-water+Intake _dermal-soil)/RfD _dermal

Wherein

HQ _Dermal---the non-carcinogenic risk of skin contact route of exposure

Intake _Dermal-water---average in life per kilogram for each person every day absorbs the reconditioning of responsive pollutant via skin contact underground water;

Intake _Dermal-soil---average in life per kilogram for each person every day absorbs the reconditioning of responsive pollutant via skin contact soil;

RfD _Dermal---the skin contact of a certain non-carcinogenic thing absorbs reference dose.

7. heavy metal pollution of soil as claimed in claim 6 is characterized in that the human healthy risk assessment system: described pollution risk level evaluation module is estimated the pollution risk rank by following formula:

R _accumulate＝(1+X) ⁿ×R

Wherein

X---be build up factor, the annual percentage amounts that increases of this heavy metal species

R---be the content of the heavy metal in the standard year soil

N---for being starting point with the standard year, the year number of experience

R _AccumulateBe the value-at-risk of having considered this heavy metal species of obtaining after the heavy metal cumulative effect.

8. heavy metal pollution of soil as claimed in claim 7 is characterized in that the human healthy risk assessment system: also comprise an alarm module, the total carcinogenic risk value that draws when the carcinogenic risk evaluation module is greater than 10 ^-6The time, or non-total carcinogenic risk value that non-carcinogenic risk assessment module draws gave a warning greater than 1 o'clock.

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