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Equipment and method for ultrasonically enhanced restoration of soil in organically polluted sites

A technology of organic pollution and ultrasonic enhancement, applied in the restoration of polluted soil, etc., can solve problems such as equipment research that has not been reported, and achieve the effect of reducing labor input, wide application and reasonable treatment process.

Active Publication Date: 2017-08-25
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the equipment research on the application of ultrasonic / zero-valent iron method to treat organically polluted soil.

Method used

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  • Equipment and method for ultrasonically enhanced restoration of soil in organically polluted sites
  • Equipment and method for ultrasonically enhanced restoration of soil in organically polluted sites
  • Equipment and method for ultrasonically enhanced restoration of soil in organically polluted sites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The soil in the pilot test is artificially polluted. Take 20cm of soil from the surface of the farmland, and then pollute it with a chlorobenzene solution dissolved in acetone at a concentration of 150mg kg -1 .

[0033]The pilot experiment was divided into two treatment groups, namely ultrasonic treatment alone and ultrasonic / zero-valent iron synergistic treatment. The amount of soil in each group was 50kg, the water-to-soil ratio was 3:1, and the amount of zero-valent iron in the ultrasonic / zero-valent iron treatment group was 100g. . The operating parameters of the pilot equipment are: ultrasonic power 1200W, stirring rate 300r / min, ultrasonic treatment time 90min. The automatic control device is used to control the running time of ultrasonic and stirring devices, and the running time of ultrasonic device and stirring device is set to 90 minutes, and the equipment will stop automatically after reaching the total running time. After the operation, mud samples were c...

Embodiment 2

[0036] The experimental soil was taken from the soil of a pesticide factory polluted site.

[0037] Under the condition of ultrasonic / zero-valent iron co-treatment, in order to explore the effect of the amount of zero-valent iron on the removal efficiency of pollutants in soil, three groups of experiments were set up, and the amount of zero-valent iron was 300g, 600g and 900g respectively. The amount of soil used in each experiment was 50kg, and the ratio of water to soil was 3:1. The operating parameters of the pilot equipment are: ultrasonic power 1200W, 2400W, 3600W, stirring rate 300r / min, ultrasonic treatment time 60min, 75min, 90min. The automatic control device is used to control the time of ultrasonic operation and stirring, set the operating time of the ultrasonic device and the stirring device, automatically start the ultrasonic device and the stirring device, and automatically stop the equipment after reaching the total operating time. After the separation of mud a...

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Abstract

The invention discloses a device and a method for ultrasonically intensified restoration of soil in an organic polluted site, and belongs to the field of restoration of polluted soil. The equipment includes: water and soil mixing and soil crushing system, high-speed stirring and ultrasonic enhanced reaction integrated system and mud-water separation system. The method is that in the water-soil mixing and soil crushing system, the mud-water mixture that is fully mixed with soil and water is crushed by the soil crushing device and then enters an integrated system integrating high-speed stirring and ultrasonic intensified reaction. After stirring evenly, turn on the ultrasonic wave. According to the type of soil, the organic pollutants in the soil can be removed in the ultrasonic enhanced reaction system by artificially adding suitable remediation agents. After the reaction is completed, it enters the mud-water separation system through the sludge pump, and the separated water can be recycled. The equipment realizes the automation of organic polluted soil treatment, can be applied to small-scale industrial production, reduces labor input, greatly improves production efficiency, and is suitable for wide application.

Description

technical field [0001] The invention belongs to the field of soil remediation equipment, and in particular relates to equipment and method for ultrasonically enhanced soil remediation of organic polluted sites. Background technique [0002] Soil is an important natural resource for human survival and development and the basis for the existence of the entire terrestrial ecosystem. It is very important for the sustainable development of agriculture and human survival. According to the UNEP (United Nations Environment Programme) 1990 report (IRRTC), about 300-400 million tons of organic matter enter the environment every year, most of which enter the soil environment. After pollutants enter the soil, they will not only affect the growth and development of plants, but also the change of biota in the soil and the transformation of substances, leading to a decline in grain production and quality, and causing secondary pollution to surface water and groundwater. Pollutants can als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/08
Inventor 郭红岩任丽静刘志超尹颖孙媛媛季荣吴海锁王晓蓉
Owner NANJING UNIV
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