Title:
METHOD FOR QUICKLY DETERMINING ENVIRONMENTAL DREDGING DEPTH OF POLLUTED SEDIMENT IN RIVER
Document Type and Number:
WIPO Patent Application WO/2023/035292
Kind Code:
A1
Abstract:
A method for quickly determining an environmental dredging depth of polluted sediment in a river. The method comprises: collecting a columnar sediment sample, and analyzing the total nitrogen content and the total phosphorus content of the columnar sediment sample at equidistant points, so as to obtain vertical distributions of the total nitrogen content and the total phosphorus content; determining a test range of the columnar sediment sample according to the maximum inflection points of the vertical distributions; taking a sediment sample within the test range, and respectively performing an ammonia nitrogen adsorption/desorption test and a total-phosphorus adsorption/desorption test by using water samples where the ammonia nitrogen and the total phosphorus in which have preset concentrations; respectively calculating an ammonia nitrogen adsorption/desorption amount and a total-phosphorus adsorption/desorption amount of sediment per unit of mass according to results of the ammonia nitrogen adsorption/desorption test and the total-phosphorus adsorption/desorption test; and determining an environmental dredging depth according to calculation results. By combining the advantages of an inflection point method and an adsorption/desorption method, a dredging depth of polluted sediment in a river is quickly and accurately determined by means of targeted adsorption/desorption tests having a reduced test range, thereby significantly improving the efficiency, facilitating engineering design and engineering application, and reducing the cost.
Inventors:
MENG YINGJIE (CN)
GU JUNJIE (CN)
HU ZHE (CN)
QIU JINWEI (CN)
FAN HONGKAI (CN)
ZHOU GUOFENG (CN)
LIU HONGYAN (CN)
HUANG LIZHU (CN)
XIAO ZIBO (CN)
GU JUNJIE (CN)
HU ZHE (CN)
QIU JINWEI (CN)
FAN HONGKAI (CN)
ZHOU GUOFENG (CN)
LIU HONGYAN (CN)
HUANG LIZHU (CN)
XIAO ZIBO (CN)
Application Number:
PCT/CN2021/118389
Publication Date:
March 16, 2023
Filing Date:
September 15, 2021
Export Citation:
Assignee:
SHANDONG ACADEMY OF ENV SCIENCES CO LTD (CN)
International Classes:
G01N7/00; G01N33/24
Foreign References:
| CN111254870A | 2020-06-09 | |||
| CN102628862A | 2012-08-08 | |||
| CN111044705A | 2020-04-21 | |||
| CN101266235A | 2008-09-17 | |||
| CN102831328A | 2012-12-19 | |||
| CN113218894A | 2021-08-06 | |||
| JP2005283511A | 2005-10-13 |
Attorney, Agent or Firm:
BEIJING IPLING INTELLECTUAL PROPERTY LAW FIRM (CN)
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