Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for predicting exposure concentration of organic chemicals after agricultural use of sludge

A technology of organic chemicals and prediction methods, applied in the direction of chemical process analysis/design, etc., can solve complex, unsuitable screening level exposure prediction, model input parameters and other problems

Active Publication Date: 2020-08-14
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the calculation process, the model calculates the concentrations of chemicals in soil, pore water, and biomass separately, and additionally considers runoff, erosion, plant uptake, soil vertical concentration differences, and the distribution of biomass and pore water. There are many input parameters and are relatively complex, so it is not suitable for exposure prediction at the screening level

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for predicting exposure concentration of organic chemicals after agricultural use of sludge
  • Method for predicting exposure concentration of organic chemicals after agricultural use of sludge
  • Method for predicting exposure concentration of organic chemicals after agricultural use of sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Select bisphenol A as the chemical to be evaluated, and collect the basic physical and chemical property data of bisphenol A, respectively molecular weight MW=228.29g·mol -1 , test vapor pressure Vp tmeptest =2.97×10 -5 Pa (test temperature 298K), water solubility Sol TempTest =300mg·L -1 (test temperature 298K), adsorption coefficient lgK oc =2.88, soil biodegradation rate k bio soil =2.31×10 -4 d -1 . According to "Anqi Yang. Research progress on the removal of new pollutants in sludge anaerobic digestion. Environmental Pollution Control, 2016, 38(3): 82-89", the concentration of bisphenol A in sludge C sludge = 1.75 mg·kg -1 . The calculation result of this prediction method is that the initial concentration of bisphenol A in the soil after the agricultural use of the sludge is 0.0077 mg·kg -1 , the concentration was 0.0071mg·kg in 30 days -1 , the 30-day average concentration is 0.0074mg·kg -1 . The concentration curve with time is shown in figure 2 ....

Embodiment 2

[0146] Select nonylphenol as the chemical to be evaluated, and collect the basic physical and chemical property data of nonylphenol, respectively molecular weight MW=220.3g·mol -1 , vapor pressure Vp=0.109Pa, water-soluble Sol=7mg·L -1 , adsorption coefficient lgK oc = 4.5, soil biodegradation rate k bio_soil =2.31×10 -4 d -1 . Concentration of nonylphenol in sludge C sludge =10.59 mg·kg -1 . After running the model calculation, the initial concentration of nonylphenol in the soil after sludge agricultural application was 0.0467mg·kg -1 , the concentration is 0 mg·kg at 30 days -1 , the 30-day average concentration is 0.017mg·kg -1 . The concentration curve with time is shown in image 3 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Molecular weightaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for predicting the exposure concentration of organic chemicals after agricultural use of sludge. According to the method, soil is used as a single uniformly-mixed interval, chemical input is agricultural use of sludge, removal includes volatilization, biodegradation and leaching, and quasi-primary dynamics is followed. According to the method, the influence of biodegradation of organic carbon capable of being quickly biodegraded and slowly degraded in the sludge on the soil-water distribution coefficient is considered. The prediction method has the advantages of fewer chemical input parameters (6), practicability, simplicity, quickness, practicability and higher prediction accuracy, and can be used for predicting the environmental exposure concentration ofchemicals at a screening level.

Description

technical field [0001] The invention relates to the field of chemical environmental risk assessment, and relates to a method for predicting the exposure concentration of organic chemicals after sludge is used for agriculture. Background technique [0002] According to the "Guidelines for Best Available Technologies for Pollution Prevention and Control of Sludge Treatment and Disposal in Urban Sewage Treatment Plants (Trial)" issued by the Ministry of Environmental Protection in 2010, and the "Technical Guidelines for Sludge Treatment and Disposal in Urban Sewage Treatment Plants" issued by the National Development and Reform Commission and the Ministry of Construction in 2011 ( Trial implementation), urban sludge land use is a major, best and feasible sludge disposal method in my country. However, in the process of sludge land use, urban sludge contains a relatively high content of organic pollutants into the soil, which may cause environmental pollution risks. Therefore, th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G16C20/10
CPCG16C20/10
Inventor 范德玲周林军刘济宁古文郭敏杨兴凤王蕾顾杰吉贵祥石利利梁梦园汪贞
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA