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Novel method for inhibiting diffusion of hydrogen phosphide from sediment of enclosed water body to atmosphere

A technology of atmospheric diffusion and phosphine, applied in the field of environmental governance

Inactive Publication Date: 2015-07-01
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, people still mainly focus on the mechanism of phosphine generation, the mechanism of mutual conversion with different forms of phosphorus in the sediment, and the mechanism of migration and diffusion. few studies involved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Using two circular containers (d=11.5 cm, h=100cm) as experimental devices, from the entrance of the closed campus river (N 31 ○ 18’29.2”, E 120 ○ 33'28.1") collect undisturbed sediment samples (25cm), put them directly into the experimental device, add water (25cm deep), cover and seal, keep away from light, and cultivate for 10 days, and measure the phosphorus in the headspace of the two experimental devices Hydrogen concentration is 1457ng / m 3 (device No. 1) and 1761ng / m 3 (device No. 2). From the 11th day onwards, the No. 1 device was still in a static culture state; the No. 2 device used a constant speed mixer to slightly disturb the surface sediment (2cm) (disturbance intensity 40 rpm), so that the surface sediment was suspended (the device was still in the Anaerobic state), disturbed once a day, 10min each time. From the 12th day to the 15th day, the headspace phosphine concentration in the two devices and the adsorbed phosphine concentration in the surface s...

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Abstract

The invention discloses a novel method for inhibiting diffusion of hydrogen phosphide from the sediment of an enclosed water body to the atmosphere. According to the method, perturbation is carried out on surface sediment, wherein perturbation intensity is set to be 30 to 60 r / min, perturbation time is set to be 30 to 60 min, perturbation frequency is set to be once every 3 days, the thickness of the perturbed surface sediment is set to be 1 to 2 cm, and the height between disturbed sediment suspension and a water surface is set to be 0.2 to 0.3 m. According to the invention, no chemical agent is added or no biological risk is introduced into the water body, the landscape functions of the water body are not destroyed, and the water body is of an enclosed type.

Description

technical field [0001] The invention relates to an environmental treatment technology, in particular to a new method for inhibiting the diffusion of phosphine in the bottom mud of a closed water body to the atmosphere. Background technique [0002] Phosphine is a gas produced by the metabolism of phosphorus-containing compounds by anaerobic microorganisms under anaerobic conditions. It diffuses from sediments to water bodies and then into the atmosphere. This gas is a greenhouse gas. [0003] Generally, the sediment of water body is divided into aerobic layer, facultative layer and anaerobic layer. Anaerobic microorganisms are ubiquitous in the anaerobic layer and produce phosphine through the metabolism of phosphorus-containing compounds. Although the produced phosphine exists in the anaerobic layer, under the action of the concentration gradient, it will gradually diffuse to the surface sediment, and then enter the water body and the atmosphere. In the process of ente...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/50
Inventor 李大鹏
Owner SUZHOU UNIV OF SCI & TECH
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