Method for determining ecological risks of heavy metal pollution in river and lake sediments
US10152762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2014 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | May 10, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG16H50/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure discloses a method for determining ecological risks of heavy metal pollution in sediments of river and lake. The method includes the following steps of: (1) determining concentration levels of heavy metal pollutants at different positions of water body sediments; (2) conducting statistic analysis on distribution characteristics of concentration data of various heavy metal pollutants in the water body sediments; (3) calculating an ecological risk index of a heavy metal pollutant using a formula; (4) calculating a final result of Eri; (5) drawing a distribution curve of Eri values; (6) calculating a total ecological risk comprehensive index HRI caused by various heavy metal pollutants in the evaluated water body, and drawing a cumulative probability distribution curve of HRI values; and (7) analyzing a probability that the total ecological risk comprehensive index HRI of the water body appears at different risk levels with reference to a risk level classification standard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.