Method for treating nitrobenzene and phenylamine waste water by using plant system

A technology for nitrobenzene and waste water, which is applied in the field of water pollution treatment, can solve the problems of disturbing the natural ecological environment, complicated control conditions and high treatment costs, and achieves the effects of improving the quality of the ecological environment, reducing investment and retaining soil.

Inactive Publication Date: 2013-08-14
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When nitrobenzene and aniline compounds enter the water body, they will cause water pollution
At present, the main treatment methods of p-nitrobenzene and aniline polluted wastewater at home and abroad are: organic solvent extraction method, adsorption method, supercritical water oxidation method, micro-electrolysis method, ozone oxidation method, anaerobic method, biochemical-physicochemical combination Many of these technologies have been successfully applied to the purification treatment of nitrobenzene and aniline wastewater, and the removal and treatment effect on pollutants can reach more than 90%, but these methods exist High cost, complex control conditions, secondary pollution caused by by-products or chemical reactions of the substance itself, etc. At the same time, there are disadvantages in the process of facility construction that disturb the natural ecological environment
In addition, although the above methods have high treatment effects, some pollutants are still discharged with wastewater, flow into rivers, or even seep into groundwater; or enter the soil, accumulate, and enter higher organisms along the food chain, causing serious poisoning effects

Method used

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  • Method for treating nitrobenzene and phenylamine waste water by using plant system
  • Method for treating nitrobenzene and phenylamine waste water by using plant system
  • Method for treating nitrobenzene and phenylamine waste water by using plant system

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for treating nitrobenzene and aniline wastewater using a plant system, comprising:

[0028] a. Improve soil acidity and alkalinity

[0029] For dry land, depressions, wetlands, tidal flats, and swamps with alkaline soil, apply decomposed fine-grained natural organic fertilizer - manure. The manure is the accumulated manure of cattle, sheep, pigs and poultry, and the application rate is 2 tons / mu; the acidic soil is applied with carbonate lime improver, and the application rate of carbonate lime improver is 0.2 tons / mu, until the soil pH is 7;

[0030] b. Planting of poplar, willow, locust tree, ice grass and reed

[0031] Mix poplars, willows, pagoda trees, and wheatgrass on the above-mentioned dry land, depressions, and tidal flats: the row spacing of poplars, willows, and locust trees × the spacing between plants is 5 × 5 meters, and the row spacing of poplars, willows, and locust trees is 5 × 5 meters. The seed sowing rate is 1.2 kg / mu;

[0032] Select th...

experiment example 1

[0038] Test the absorption and enrichment effects of 10 species of poplar, weeping willow, locust tree, red leaf plum, red willow, elm, reed, wheatgrass, foxtail, and buckwheat on the two types of pollutants in soil, nitrobenzene and aniline

[0039] The present invention respectively planted poplar, weeping willow, locust tree, red leaf plum, red willow, elm, wheatgrass, foxtail, and mountain buckwheat on dry land in March 2010, reeds were planted on swampy land, and soil and plant stems and leaves were collected in November. , root, and branch samples, measure the concentration increment of pollutants in each plant after 8 months, and calculate the enrichment coefficient. The results are shown in Table 1:

[0040] Table 1 Absorption and enrichment effects of different plants on two types of pollutants in soil

[0041]

[0042]

[0043] It can be seen from Table 1 that among the 10 species, willow, poplar, locust tree, wheatgrass, and reed plants have very high enrichme...

experiment example 2

[0045] Test the effect of different planting methods on the removal of pollutants in the soil

[0046] The present invention was carried out in the dry land of single species of willow, poplar, locust tree and ice grass, the swamp of single species of reed, and the dry land of mixed species of willow, poplar, locust tree and ice grass from May to November, 2010. Collect samples at 20 cm from the soil surface, measure the pollutant content in the soil layer before and after, compare the changes, and calculate the restoration efficiency of plants to pollutants in the soil. The results are shown in Table 2 and Table 3:

[0047] Table 2 Effects of different planting methods on the removal of pollutants in soil

[0048]

[0049]It can be seen from Table 2 that the single and mixed planting of plants on the site have different effects on the removal of pollutants in the soil. When the five species of willow, poplar, locust tree, wheatgrass, and reed were planted alone, the remed...

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Abstract

The invention relates to a method for treating nitrobenzene and phenylamine waste water by using a plant system. The method is characterized in that plants are planted on dry land, low-lying land, wet land, intertidal zone and marsh land. The waste water is introduced through a pipeline, and in addition, the nitrobenzene and phenylamine contaminants are absorbed and enriched under the effect of plants. Through the tests, poplars, willows, locust trees, wheatgrass and reed have high enriching coefficients on nitrobenzene and phenylamine and can be used for efficiently removing contaminant substances, and the problem of nitrobenzene and phenylamine waste water pollution is solved. The method has the advantages that the investment and operation cost is low, the maintenance is simple, the engineering quantity is small, and good effects of preserving soil and water, conserving soil and beautifying the landscape environment are realized.

Description

technical field [0001] The invention belongs to a water pollution treatment technology, specifically, nitrobenzene and aniline waste water is put into the land where plants are planted, and the pollutants in the waste water are intercepted and adsorbed by soil organic matter, particles, microbial groups and plant roots, After that, it is absorbed and enriched by plants to accelerate the removal of nitrobenzene and aniline pollutants in wastewater. Background technique [0002] Nitrobenzene and aniline compounds are widely used in the production of medicines, pesticides, dyes, explosives and other related chemical products. These compounds are highly toxic and difficult to degrade, can persist and accumulate in the environment for a long time, and can also enter the human body and other organisms through respiratory inhalation or skin absorption and food chain system, causing neurological symptoms, anemia and liver diseases, etc. It seriously threatens the health of human be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F101/38C02F3/32
CPCY02W10/10
Inventor 张有贤刘振龙刘威杨志强
Owner LANZHOU UNIVERSITY
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