Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method of purifying artificial wetland of streamside zone of cadmium-polluted irrigation water

A technology for artificial wetlands and purification treatment, applied in chemical instruments and methods, water pollutants, sustainable biological treatment, etc., can solve the problems of large floor space, poor stability, secondary pollution, etc., and achieve low construction costs and cost. Low, the effect of improving the ecological environment

Active Publication Date: 2017-09-01
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the current technical difficulties in the treatment of cadmium-contaminated irrigation water, such as large area, high cost, poor stability, and easy to cause secondary pollution, the purpose of the present invention is to provide a riverside constructed wetland system for purifying and treating cadmium-contaminated irrigation water. The method does not occupy farmland, has high removal efficiency, low operating cost, and is easy to operate and manage, and meets the need for purification of irrigation water sources in the restoration of heavy metal pollution in cultivated land

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 of purifying artificial wetland of streamside zone of cadmium-polluted irrigation water
  • Method of purifying artificial wetland of streamside zone of cadmium-polluted irrigation water
  • Method of purifying artificial wetland of streamside zone of cadmium-polluted irrigation water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for purifying and treating cadmium-contaminated irrigation water in a riverside constructed wetland, the steps of which are:

[0028] (1) Location selection: select a section of the river downstream of Ronghe Bridge with relatively gentle water flow, the length is about 85m, and the silted beach area is about 600 square meters. The end of the wetland is the intake of irrigation water.

[0029] (2) The river channel 8 is reinforced; according to the width of the water surface in the dry season, along the contour lines of the left and right sides of the river channel 8, the second retaining wall 7 is constructed with hemp stones and M7.5 mortar masonry according to the longitudinal slope of 1 / 400 to prevent flooding Scouring of constructed wetlands.

[0030] (3) Bank slope improvement; earthwork on the left bank to build a levee 1 to prevent flood overflow, with a length of 85m and a cross-section of 1m×1.5m. The slope on the left bank is 1:0.7; 2.5m×0.305m, us...

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

No PUM Login to View More

Abstract

The invention discloses a method of purifying an artificial wetland of a streamside zone of cadmium-polluted irrigation water. The method comprises the following steps: A, site selection: selecting a stream segment, the water flow of which is relatively low and the distance from which to an irrigation water intake is relatively short; B, channel reinforcement: performing reinforcement with grouted rubbles on the left and right sides of the channel, and keeping the flood flowing function of the original channel; C, slope renovation: reinforcing the bases of the left and right banks with grouted rubble retaining wall; D, channel dredging: transforming the basement for silt; E, wetland bed filling: successively filling quick limestones, clinoptilolite, slag, river sand and soil in layers from bottom to top; F, new construction of a submerged dike: constructing the submerged dike at the tail end of the artificial wetland, connecting to a downstream channel, and forming prefabricated sediment flushing outlets in the middle of the submerged dike; G, plant configuration; and H, maintenance management of the artificial wetland. According to the method, croplands are not occupied, the removal efficiency is high, the operating cost is low, the method is easy to operate and manage, and the demand on purifying an irrigation water source in heavy metal pollution repair of cultivated lands is met.

Description

technical field [0001] The invention belongs to the field of heavy metal pollution restoration and water purification treatment, and more specifically designs a method for purifying and treating cadmium-contaminated irrigation water in riverside artificial wetlands, which is suitable for the restoration of heavy metal-polluted cultivated land in southern my country, before the irrigation water enters the paddy fields It is an effective method to reduce heavy metal pollution such as cadmium in irrigation water with low cost, easy operation and management, through matrix adsorption and aquatic plant purification in constructed wetlands in the riverside zone. Background technique [0002] On April 17, 2014, the "National Soil Pollution Survey Bulletin" jointly issued by the Ministry of Environmental Protection and the Ministry of Land and Resources showed that the rate of soil points exceeding the standard in cultivated land in my country was 19.4%, and the proportion of points w...

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): C02F3/32C02F101/20
CPCC02F3/32C02F2101/20Y02W10/10
Inventor 陈心胜黄道友朱捍华许超李旭谢永宏
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com