Method for monitoring heavy metal pollution of urban roads

A pollution monitoring and heavy metal technology, which is applied in the preparation of test samples, thermal excitation analysis, sampling devices, etc., can solve the problems that are rarely reported in research, and achieve the effect of protecting the environment and maintaining ecological balance

Inactive Publication Date: 2009-12-09
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic research on urban heavy metals mainly focuses on soil or plants, but there are few reports on heavy metals in urban road dust.

Method used

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  • Method for monitoring heavy metal pollution of urban roads
  • Method for monitoring heavy metal pollution of urban roads
  • Method for monitoring heavy metal pollution of urban roads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Select representative road intersections as sampling points, including overpasses with a lot of traffic flow within the inner ring. Collect dust samples from the ground. The collected dust samples are air-dried naturally. Use a finer sieve to sieve the finer dust part to remove sand, plant debris and other impurities in the sample, and set aside;

[0019] (2) Accurately weigh 0.5000g of soil sample, add 1.5ml H 2 SO 4 , 3ml HNO 3 , 9ml HCl, heated at a constant temperature of 160°C, until there is little brown gas, add 0.5ml HClO 4 Digest until the solution is clear and the precipitate is white; raise the temperature slightly to catch HClO 4 , the solution was evaporated to near dryness;

[0020] (3) Add 0.5ml HNO to the digested sample 3 , add a little deionized water to dissolve, then transfer to a 10ML colorimetric tube, dilute to volume with deionized water, and store;

[0021] (4) Take the upper clear night, and use CP-AES to measure the Cr, Mn, Ni, Cu, Z...

Embodiment 2

[0022] Embodiment 2 (more detailed experimental process is as follows)

[0023] sampling

[0024]The sampling method refers to the "Collection and Processing of Soil Samples", and according to the distribution of roads in Tianjin, select representative road intersections as sampling points, including within the inner ring, between the inner and middle rings, and between the middle and outer rings. Main arterial roads and secondary arterial roads with relatively less traffic volume, and overpass bridges with more traffic volume. Collect ground dust samples and bring them back to the laboratory. The plow layer soil was collected as a control to evaluate the heavy metal pollution in road dust.

[0025] Sample pretreatment

[0026] Air-dry the collected dust samples naturally, and use a finer sieve to sieve the finer dust part to remove sand, plant debris and other impurities in the sample, so that the experiment can avoid the interference of irrelevant impurities and make the ...

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Abstract

The invention discloses a method for monitoring heavy metal pollution of urban roads, comprising the following steps: selecting samples of dust on the grounds of main roads inside the inner rings, between the inner rings and the middle rings as well as between the middle rings and the outer rings, of secondary main roads with relatively small traffic flow and of overpasses with relatively heavy traffic flow; drying collected soil samples in natural state and screening the soil samples, collecting throughs, accurately weighing about 0.5g of samples and adding 12mL of aqua regia for digestion treatment, and determining the contents of the heavy metal elements in the above soil sample analysis test solution by the ICP method. Although possessing particularity, the method of the invention has certain reference value toward the environmental protection of the cities of the same types and provides a scientific basis for protecting environment, maintaining ecological balance and building good living environment.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a method for monitoring urban environment, more specifically a method for monitoring heavy metal pollution on urban roads. Background technique [0002] With the continuous progress of human society and the rapid development of the world economy, the wave of disorderly expansion and expansion of urbanization is sweeping the world. While industrialization, modernization, and urbanization have brought benefits to human beings, they have also brought a series of serious ecological and environmental problems such as environmental pollution. Improving environmental quality has become the consensus of mankind and an urgent problem to be solved. Among all the environmental problems, the heavy metal pollution brought by human activities to the environment, especially the heavy metal pollution of the soil, has become more and more prominent with the development of economic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/10G01N1/28
Inventor 赵树兰多立安邢燕
Owner TIANJIN NORMAL UNIVERSITY
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