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Method for washing out rocks in soil and/or construction waste surface chlorinated nitrobenzene pollution with anion/nonionic mixed surfactant

A technology of surfactant and construction waste, applied in the field of soil pollution treatment

Active Publication Date: 2015-09-02
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is: in view of the problem in the prior art that there are few special treatment methods for chlorinated nitrobenzene pollution on the surface of stones in the soil and / or construction waste, provide an anionic / nonionic mixed Method for washing out stones and / or construction waste surface chlorinated nitrobenzene pollution in soil by surfactant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Select an actual chlorinated nitrobenzene-contaminated site to pollute the soil, carry out physical screening on the polluted soil, and separate the larger stones and construction waste. Prepare 2L of sodium dodecylbenzenesulfonate aqueous solution with a concentration of 8g / L, prepare 2L of Tween-80 aqueous solution with a concentration of 12g / L, and put it in a 5L glass reaction vessel according to the volume ratio : Tween-80 aqueous solution=1:1 ratio mixing two kinds of surfactant solutions. Weigh 1Kg of separated stones and construction waste (i.e. 0.25Kg / L mixed surfactant solution) and put it into the reaction container, and mix the stones and construction waste with the mixed surfactant solution fully by stirring, and after fully contacting and reacting for 1 day , let the reaction suspension stand still, and discharge the upper aqueous solution after the stones and construction waste completely sink to the bottom layer. The removal rate of chlorinated nitroben...

Embodiment 2

[0025]Select an actual chlorinated nitrobenzene-contaminated site to pollute the soil, carry out physical screening on the polluted soil, and separate the larger stones and construction waste. Prepare 2L of sodium dodecylbenzenesulfonate aqueous solution with a concentration of 12g / L, prepare 2.4L of Tween-80 aqueous solution with a concentration of 8g / L, and put it in a 5L glass reaction vessel according to the volume ratio of sodium dodecylbenzenesulfonate Aqueous solution: Tween-80 aqueous solution = 1:1.2 ratio mixing two surfactant solutions. Weigh 2.2Kg of separated stones and construction waste (i.e. 0.5Kg / L mixed surfactant solution) into the reaction vessel, and mix the stones and construction waste with the mixed surfactant solution by stirring to fully contact the reaction 3 After one day, let the reaction suspension stand still, and discharge the upper aqueous solution after the stones and construction waste completely sink to the bottom layer. The removal rate of...

Embodiment 3

[0027] Select the actual chlorinated nitrobenzene contaminated soil in a certain place, conduct physical screening on the contaminated soil, and separate the larger construction waste. Prepare 2L of sodium dodecylbenzenesulfonate aqueous solution with a concentration of 10g / L, prepare 1.6L of Tween-80 aqueous solution with a concentration of 10g / L, and put it in a 5L glass reaction vessel according to the volume ratio of sodium dodecylbenzenesulfonate Aqueous solution: Tween-80 aqueous solution=1:0.8 ratio mixing two kinds of surfactant solutions. Take by weighing 1.44Kg isolated construction waste (i.e. 0.4Kg / L mixed surfactant solution) and put it into the reaction vessel, make the construction waste and mixed surfactant solution fully mix by shaking, after fully contacting and reacting for 2 days, let the reaction suspend Turbid liquid, after the construction waste completely sinks to the bottom layer, discharge the upper layer aqueous solution. The removal rate of chlorin...

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Abstract

The invention discloses a method for eluting chloronitrobenzene type pollutants on the surfaces of stones and construction waste in soil with an anion / nonionic mixed surfactant. The method comprises the following steps: physically screening polluted soil, and separating large stones and / or construction waste out; preparing a 8-12 g / L sodium dodecyl benzene sulfonate water solution serving as an anion surfactant and a 8-12 g / L Tween-80 water solution serving as a nonionic surfactant, and mixing the sodium dodecyl benzene sulfonate water solution and the Twain-80 water solution in the volume ratio of sodium dodecyl benzene sulfonate to Twain-80 being 1:(0.8-1.2); adding the separated stones and / or construction waste into the mixed surfactant solution in the amount of 0.25-0.5 Kg / L; oscillating and stirring to fully mix the stones and / or construction waste and the mixed surfactant solution, reacting for 1-3 days, and separating and discharging the mixed surfactant solution. The method disclosed by the invention is simple and feasible, has low requirement on equipment and energy consumption, is convenient to operate, and is easy for large-scale production and application; the aim of removing organic chloronitrobenzene type pollutants on the surfaces of the stones and the construction waste can be fulfilled within a short period of time.

Description

Technical field: [0001] The invention belongs to the technical field of soil pollution treatment, and in particular relates to a method for eluting chlorinated nitrobenzene pollution from stones in soil and / or construction waste surfaces with an anion / nonionic mixed surfactant. Background technique: [0002] Soil pollution refers to the phenomenon that harmful and toxic substances entering the soil exceed the self-purification capacity of the soil, resulting in changes in the physical, chemical and biological properties of the soil, reducing the yield and quality of crops, and endangering human health. Pollution changes the population of soil organisms, directly affects the structure and function of the soil ecosystem, leads to the degradation of production capacity, and ultimately poses a threat to ecological security and human life and health. Because of its slowness and concealment, it is called "invisible pollution" (Chen Yibing, Lin Chaowen, Huang Jingjing. Soil polluti...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/00
Inventor 喻恺李青青朱杰王旌李忠元朱江罗启仕杨洁
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES