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Heavy metal biological sorbent, preparing method and applications thereof

A biosorbent and heavy metal technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem of production cost restricting the industrial application of biosorbents, and achieve industrial application, saving operating costs, and realizing resource utilization. Effect

Inactive Publication Date: 2008-07-30
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high production cost limits the industrial application of biosorbents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Collect return sludge from Guangzhou Liede Sewage Treatment Plant, take 150g of the above sludge, add 20g of sucrose to make C / N 8:1, then dilute to 1000ml, adjust pH6, as microbial culture medium. The liquid medium was inoculated with Candida utilis and cultured in a shaker (200 rpm) with a culture temperature of 32° C., a culture time of 33 h, and centrifugation at 3000 rpm for 5 min to obtain an adsorbent. Adding 10g / L of the adsorbent, processing 15mg / L chromium solution, shaking the shaker at 50rpm for 2h and centrifuging at 2500rpm for 5min, the removal rate can reach 95%.

Embodiment 2

[0019] Example 2: Collect returned sludge from Guangzhou Liede Sewage Treatment Plant, take 100g of the above sludge, add 10g of glucose to make C / N 5:1, then dilute the volume to 1000ml, adjust the pH to 7, as a microbial culture medium . The liquid medium was inoculated with Candida lipolytica and cultured in a shaker with shaking (100 rpm) at a culture temperature of 30° C., a culture time of 25 h, and centrifugation at 3500 rpm for 8 min to obtain an adsorbent. Adding 6g / L of the adsorbent, processing 10mg / L chromium solution, shaking the shaker at 200rpm for 8h and centrifuging at 5000rpm for 10min, the removal rate can reach 98%.

Embodiment 3

[0020] Example 3: Collect return sludge from Guangzhou Liede Sewage Treatment Plant, take 200g of the above sludge, add 15g fructose to make C / N 6:1, then dilute the volume to 1000ml, adjust pH5, and use it as microbial culture base. Inoculate the sporobolus yeast in the above liquid medium and shake culture (150rpm) in a shaker at a culture temperature of 37°C, a culture time of 35h, and a centrifugation at 4000rpm for 10min. The collected bacterial sludge is the heavy metal biosorbent. Adding 8g / L of the adsorbent, processing 20mg / L copper liquid, shaking the shaker at 150rpm for 6h and centrifuging at 3000rpm for 6min, the removal rate can reach 90%.

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PUM

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Abstract

The invention discloses a biosorbent of heavy metal, a preparation method thereof and application. Nutritive materials are added into residual activated sludge and C / N and pH are respectively adjusted to 5:1-8:1 and 5-7 so as to obtain microbial media in which the yeast is inoculated in shaking culture at the temperature of 30-37 DEG C and the speed of 100-200rpm for 25-35h and then is centrifuged for 5-10min at 3000-4000rpm; the collected bacterial sludge is the biosorbent of heavy metal. The sorbent is added into the heavy metal waste water with quality concentration ratio between the sorbent and the heavy metal waste water of 5-10g / L:10-20mg / L, table shaken with rotational speed at 50-200rpm for 2-8h and the treatment of heavy metal waste water can be realized by centrifugalization. The invention can reduce production cost of the sorbent, save operation cost of sewage treatment plants and improve the treatment efficiency.

Description

Technical field [0001] The invention relates to the field of development of adsorbents, in particular to a heavy metal bioadsorbent and its preparation method and application. Background technique [0002] The environmental hazards caused by a large amount of heavy metal wastewater discharged from electroplating, mining, smelting, chemical, textile, printing and dyeing, medicine, paint, alloy, paper, ceramics and other industries have attracted widespread attention from the government and all walks of life. Traditional heavy metal wastewater treatment methods mainly include precipitation method, chemical redox method, evaporation method, ion exchange method, electrochemical treatment method, membrane technology separation method, etc. The most prominent disadvantage of these methods is the treatment of low concentration (<100mg / L ) In the case of heavy metal wastewater, the operation is cumbersome, the operation cost is high, and the secondary pollution is easy to form. In rec...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30
Inventor 尹华叶锦韶何宝燕张娜秦华明彭辉
Owner JINAN UNIVERSITY
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