CN102489263A - Environment-friendly method for treating mercury-containing wastewater - Google Patents
Environment-friendly method for treating mercury-containing wastewater Download PDFInfo
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- CN102489263A CN102489263A CN2011104117237A CN201110411723A CN102489263A CN 102489263 A CN102489263 A CN 102489263A CN 2011104117237 A CN2011104117237 A CN 2011104117237A CN 201110411723 A CN201110411723 A CN 201110411723A CN 102489263 A CN102489263 A CN 102489263A
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Abstract
The invention discloses an environment-friendly method for treating mercury-containing wastewater, and relates to a water treatment method. According to the method, fungus aspergillus niger is used as an adsorbent, and an adsorbent group and Hg ions are subjected to complexation. The method comprises the following steps of: preparing the fungus aspergillus niger adsorbent, inoculating the separated and domesticated aspergillus niger strain to a potato culture solution, shaking in a shaker for 48 hours, filtering, drying, and grinding into powder; performing a water treatment experiment, adding the prepared adsorbent into the wastewater to be treated in a ratio, shaking in the shaker for 1 hour, centrifuging, measuring supernatant, filtering a lower layer, and keeping the adsorbent for later use; and putting the adsorbent into a desorbent for desorption, recovering mercury, and recycling the adsorbent. The initial environment in the method is weakly acidic and has the pH of 5 to 6. By the method, the fungus aspergillus niger is used as the adsorbent, the effect of removing low-concentration mercury-containing wastewater is good, cost is low, the adsorbent can be recycled and is environment-friendly, and secondary pollution is avoided.
Description
Technical field
The present invention relates to a kind of method for treating water, particularly relate to a kind of processing method of environment-friendly type mercury-containing waste water.
Background technology
Mercury-containing waste water is one of the most serious industrial wastewater of a kind of environmental pollution; It is mainly derived from the waste water that industry such as chemical industry, metallurgy, machinery are discharged, and wherein the waste water of chlorine industry, plastics industry, electronics industry, the discharging of amalgamate Melting Gold Production is the main pollution source of mercury in the water body.Enter mercury and compound thereof in the water body, form the mercury of various forms, even can change into the very big methyl compounds of toxicity through physics, chemistry and biological agent.The minamata disease that nineteen fifty-three occurs in Japan is caused by the methyl-mercuric chloride polluted water region of chemical plant emission.
At present; The method of handling mercury-containing waste water mainly contains the precipitation method, ion-exchange resin, electrolysis, active carbon adsorption, hyperfiltration, electroosmose process etc.; These methods have obtained certain effect to a certain extent; But also ubiquity secondary pollution, cost is high, treatment effect is not ideal enough, particularly there is problems such as being difficult to processing in low mercury concentration waste water.Compare with conventional art, the microorganism absorption method has the following advantages: (1) small investment, and operating cost is low, non-secondary pollution; (2) treatment effeciency is high, and under low concentration, metal can optionally be removed; (3) acidity and temperature conditions wide ranges.The current microbial adsorbent of studying mainly is meant bacterium, fungi and algae.The efficient that Yin Pinghe etc. utilize marine alga to remove heavy metal ion in the solution reaches 90%, and Feng Yijun utilizes the FT bacterium can reach 99% to the accumulation rate of uranium, and Deng Xu etc. utilize engineering bacteria effectively to remove the mercury ion in the electrolysis wastewater.Aspergillus niger is common microbial resources, and the source is abundant, is easy to cultivate, and will practice thrift cost greatly if can utilize this quasi-microorganism to handle waste water.
Summary of the invention
The processing method that the purpose of this invention is to provide a kind of environment-friendly type mercury-containing waste water, this method is an adsorbent with the fungi aspergillus niger, is a kind of environmentally friendly adsorbent; Mercury-containing waste water removal effect to low concentration is good; And cost is lower, can recycle, do not produce secondary pollution.
Technical scheme of the present invention is:
A kind of processing method of environment-friendly type mercury-containing waste water; This method is to be adsorbent with the fungi aspergillus niger, and adsorbent group and Hg ion generation complexing at first prepare fungi aspergillus niger adsorbent; The aspergillus niger strain that separates, tamed is inoculated in the potato nutrient solution; The shaking table concussion was filtered, is dried after 48 hours, and the grind up powder gets final product; Do water treatment experiment then, the adsorbent that makes is joined in the pending waste water in proportion, shaking table concussion 1 hour, centrifugal, to get supernatant and measure, lower floor filters, and it is subsequent use to keep adsorbent; Again adsorbent is put into the strippant desorb, reclaim mercury, the adsorbent of recycle simultaneously.
The processing method of described a kind of environment-friendly type mercury-containing waste water, the initial environment of described method is faintly acid pH 5 ~ 6.
The processing method of described a kind of environment-friendly type mercury-containing waste water, its described aspergillus niger adsorbent aspergillus niger cell surface is poroid.
Advantage of the present invention and effect are:
1. aspergillus niger adsorbent aspergillus niger cell surface is poroid among the present invention; Specific area is big, and high adsorption capacity can better adsorb metal Hg ion; And the mercury-containing waste water to low concentration all has a treatment effect preferably, and the water of handling can reach the discharge standard of GB.
2. the aspergillus niger adsorbent screens domestication from contaminated soil, and used potato culture medium cost is lower, obtains easily, and adsorbent can also recycle, and compares with conventional method, greatly reduces cost of water treatment.
3. the most important is the relatively environmental protection of this method, can not produce secondary pollution, is a kind of environmentally friendly method for treating water.
Description of drawings
Fig. 1 is the sem photograph of aspergillus niger of the present invention;
Fig. 2 is the IR spectrogram of aspergillus niger of the present invention.
Annotate: Fig. 1-Fig. 2 of the present invention is the analysis sketch map or the photo of product state, figure Chinese words or the unintelligible understanding that does not influence technical scheme of the present invention of image.
The specific embodiment
With reference to the accompanying drawings the present invention is elaborated.
This method of the present invention is to be adsorbent with the fungi aspergillus niger, and the aspergillus niger cell surface is poroid, like Fig. 1; Specific area is big, and high adsorption capacity is good to the mercury-containing waste water removal effect of low concentration; And cost is lower; Can recycle, do not produce secondary pollution, be a kind of environmentally friendly adsorbent.
Principle of the present invention is: Han You – COOH ， – NH in the fungi aspergillus niger cell
2He – OH isoreactivity group, like Fig. 2, these groups can with Hg ion generation complexing.
Hg (II) the solution 50mL of accurately measuring 0.1 mg/L transfers to pH 5.5 in the conical flask of 250mL, add the aspergillus niger adsorbent of 0.1g respectively; Place the gas bath oscillator; Drop into adsorbent and promptly begin to shake timing, centrifugal behind the 1h (with the centrifugal 10min of the speed of 5000r/min) static then 10min detects Hg (II) concentration and initial value in the supernatant; The result shows that the clearance of Hg (II) reaches 99.2%, has removed residual 0.001mg/L < < 0.05mg/>L (GB) in the water of back.
Claims (3)
1. the processing method of an environment-friendly type mercury-containing waste water is characterized in that, this method is to be adsorbent with the fungi aspergillus niger; Adsorbent group and Hg ion generation complexing; At first prepare fungi aspergillus niger adsorbent, the aspergillus niger strain that separates, tamed is inoculated in the potato nutrient solution, the shaking table concussion is after 48 hours; Filter, dry, the grind up powder gets final product; Do water treatment experiment then, the adsorbent that makes is joined in the pending waste water in proportion, shaking table concussion 1 hour, centrifugal, to get supernatant and measure, lower floor filters, and it is subsequent use to keep adsorbent; Again adsorbent is put into the strippant desorb, reclaim mercury, the adsorbent of recycle simultaneously.
2. the processing method of a kind of environment-friendly type mercury-containing waste water according to claim 1 is characterized in that, the initial environment of described method is faintly acid pH 5 ~ 6.
3. the processing method of a kind of environment-friendly type mercury-containing waste water according to claim 1 is characterized in that, described aspergillus niger adsorbent aspergillus niger cell surface is poroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104117237A CN102489263A (en) | 2011-12-12 | 2011-12-12 | Environment-friendly method for treating mercury-containing wastewater |
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| CN2011104117237A CN102489263A (en) | 2011-12-12 | 2011-12-12 | Environment-friendly method for treating mercury-containing wastewater |
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| CN102489263A true CN102489263A (en) | 2012-06-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104560736A (en) * | 2015-01-08 | 2015-04-29 | 中节能六合天融环保科技有限公司 | Fungi strain GX-4 and application thereof in mercury-containing wastewater treatment |
| CN105146722A (en) * | 2015-08-28 | 2015-12-16 | 安徽中烟工业有限责任公司 | Method for selectively reducing content of Hg in paper-making method reconstituted tobacco extract liquor |
| CN105169949A (en) * | 2015-08-28 | 2015-12-23 | 安徽中烟工业有限责任公司 | Method for selectively reducing content of As in papermaking technology reconstructed tobacco leaf extract liquid |
| CN108745294A (en) * | 2018-06-01 | 2018-11-06 | 太原理工大学 | A kind of method that fungi-kitchen garbage mixing solid phase fermentation prepares heavy metal absorbent |
| CN110526421A (en) * | 2019-09-10 | 2019-12-03 | 中交铁道设计研究总院有限公司 | A method of heavy metal ions in sewage is removed using Gordonia bronchialis is hooked |
-
2011
- 2011-12-12 CN CN2011104117237A patent/CN102489263A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 李盼盼等: "黑曲霉对模拟废水中汞的吸附", 《沈阳化工大学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104560736A (en) * | 2015-01-08 | 2015-04-29 | 中节能六合天融环保科技有限公司 | Fungi strain GX-4 and application thereof in mercury-containing wastewater treatment |
| CN105146722A (en) * | 2015-08-28 | 2015-12-16 | 安徽中烟工业有限责任公司 | Method for selectively reducing content of Hg in paper-making method reconstituted tobacco extract liquor |
| CN105169949A (en) * | 2015-08-28 | 2015-12-23 | 安徽中烟工业有限责任公司 | Method for selectively reducing content of As in papermaking technology reconstructed tobacco leaf extract liquid |
| CN108745294A (en) * | 2018-06-01 | 2018-11-06 | 太原理工大学 | A kind of method that fungi-kitchen garbage mixing solid phase fermentation prepares heavy metal absorbent |
| CN110526421A (en) * | 2019-09-10 | 2019-12-03 | 中交铁道设计研究总院有限公司 | A method of heavy metal ions in sewage is removed using Gordonia bronchialis is hooked |
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Application publication date: 20120613 |