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High-efficiency adsorbent for heavy metals in drinking water

An adsorbent, heavy metal technology, applied in the fields of adsorption water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve the problems of heavy metal lead exceeding the standard, unable to be scientifically used, troublesome and so on

Active Publication Date: 2020-08-18
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the heavy metal pollution of the water source, the heavy metal content of the tap water prepared by the waterworks reaches a critical value or exceeds the standard in some cases; due to the use of old water supply pipe networks, the heavy metals such as lead in the originally qualified tap water exceed the standard during the transportation process; due to household faucets, water heaters Good and bad materials are mixed, resulting in heavy metals such as manganese exceeding the standard, etc.
Although there are already water purifiers with the function of removing heavy metals in the market, the adsorption column or ion exchange column often used in water purifiers needs to be checked and replaced regularly, which is relatively troublesome, and its validity period varies with the quality of the treated water. , there are many people in the general population who cannot do scientific use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Pseudoalteromonas bacteria included in high-efficiency adsorbents for heavy metals in drinking water Pseudoalteromonas sp. GHS18 and Pseudomonas alternata Pseudoalteromonas Exopolysaccharides produced by co-fermentation of sp. JP. Among them, the classification of Pseudoalteromonas GHS18 is named Pseudoalteromonas ( Pseudoalteromonas sp. ), was deposited in the General Microorganism Center (CGMCC) of the China Committee for the Collection of Microorganisms on August 29, 2016, and the preservation number is CGMCC No. 12913. The taxonomic designation of Pseudomonas alternata JP is Pseudomonas alternata ( Pseudoalteromonas sp. ), was deposited in the General Microorganism Center (CGMCC) of the China Committee for the Collection of Microorganisms on August 29, 2016, and the preservation number is CGMCC No.12914. The General Microorganism Center (CGMCC) of China Committee for Culture Collection of Microorganisms is located at No. 3, Yard No. 1, Beichen West Road, Chaoy...

Embodiment 2

[0031] The components and parts by weight of the high-efficiency heavy metal adsorbent for drinking water are 2 parts of agar, 1 part of starch, 2 parts of exopolysaccharide and 32 parts of water.

[0032] The preparation method of adsorbent comprises the following steps:

[0033] 1) Seed liquid culture: Pseudoalteromonas Pseudoalteromonas sp. GHS18 and Pseudomonas alternata Pseudoalteromonas sp. JP was mixed and inoculated on the slant medium at a ratio of 1:2, inoculated on the slant medium, and incubated at 22°C for 72 hours. Add sterile water 1.2 times the volume of the culture medium and shake to prepare the seed liquid. The composition and concentration of the slant medium are glucose 18g / L, urea 0.51g / L, ammonium sulfate 0.24g / L, yeast extract 0.4g / L, dipotassium hydrogen phosphate 3.5g / L, potassium dihydrogen phosphate 1.7g / L , agar 15g / L and the remainder aged seawater or artificial seawater; adjust the pH to 7.4, and autoclave at 121°C for 30min. Among them, the ...

Embodiment 3

[0038] Embodiment 3: the detection of adsorbent to manganese ion adsorption effect

[0039] 1) Prepare a manganese ion solution with a concentration of 0.5mg / L;

[0040] 2) Weigh 10g of wet-type heavy metal high-efficiency adsorbent into a 150mL conical flask;

[0041] 3) Heat the solution to boiling and then cool slightly. Measure 50mL of manganese ion solution into conical flasks filled with adsorbent, and shake for 10 minutes to fully contact the adsorbent and manganese ion solution. Another 50mL solution was taken as the water sample before treatment;

[0042] 4) Centrifuge the water sample after adsorption (10000×g, 20min) to remove the residual adsorbent in the water. After treatment, take two 10mL water samples respectively in two 25mL colorimetric tubes, set the volume to 25mL, and mark 1 and 2. Water sample 2 is a parallel control;

[0043] 5) Take 10mL of the water sample before treatment in a 25mL colorimetric tube, set the volume to 25mL, and mark it;

[0044...

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PUM

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Abstract

The invention discloses a drinking water heavy metal efficient adsorbent. The adsorbent contains exopolysaccharides which is generated by synergistic fermentation of pseudoalteromonas GHS18 with the preservation number being CGMCC No.12913 and pseudoalteromonas JP with the preservation number being CGMCC No.12914. The drinking water heavy metal efficient adsorbent has the following beneficial effects: growth and propagation between the pseudoalteromonas sp. GHS18 and the pseudoalteromonas sp. JP have remarkable synergistic effect, the adsorption effect of the adsorbent prepared from the obtained exopolysaccharides on the heavy metal in water is better than that of the adsorbent prepared from the exopolysaccharides obtained through fermentation of single marine bacteria, and remarkable progress is achieved. The prepared adsorbent can adsorb various kinds of heavy metal such as cadmium, lead and copper in the drinking water, has high adsorption efficiency and stable performance, is green and safe, and has high economic value.

Description

technical field [0001] The invention relates to the technical field of water purification, in particular to an efficient adsorbent for heavy metals in drinking water. Background technique [0002] Heavy metals generally refer to metals with a specific gravity greater than 4.0 and an atomic number above 24 in the periodic table. The heavy metals that pollute the water environment mainly include arsenic, mercury, cadmium, lead, chromium, copper, zinc, nickel, manganese, silver, etc. Among them, arsenic, mercury, cadmium, and lead are the most toxic and difficult to handle. The most common heavy metal pollutants. [0003] Due to the heavy metal pollution of the water source, the heavy metal content of the tap water prepared by the waterworks reaches a critical value or exceeds the standard in some cases; due to the use of old water supply pipe networks, the heavy metals such as lead in the originally qualified tap water exceed the standard during the transportation process; du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C12P19/04C12R1/01C02F101/20
CPCB01J20/24B01J2220/4868C02F1/286C02F2101/20C12P19/04
Inventor 穆军崔霞王玉霞
Owner ZHEJIANG OCEAN UNIV
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