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Composite microalgae biosorbent microsphere and method for adsorbing chromium in waste water

A microalgae biological and adsorbent technology, applied in biological water/sewage treatment, alkali metal compounds, chemical instruments and methods, etc., can solve the problems of difficult separation, inability to metabolize heavy metals, etc., and achieves strong environmental adaptability and adsorption capacity. Large, high-yield effects

Active Publication Date: 2019-01-11
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to separate the adsorbent from wastewater after adsorption, and dead algae cannot metabolize heavy metals, so complex desorption treatment is required for recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A composite microalgae biosorbent microsphere, including chlorella cells, magnetic Fe 3 o 4 Nanoparticles, corncob activated carbon and sodium alginate. Its preparation method comprises the following steps:

[0029] (1) Cultivate the chlorella cells in the BG11 medium for 5 days, then centrifuge at a speed of 4000rpm for 8min, remove the supernatant, and the lower layer is the chlorella biological concentrate;

[0030] (2) Adjust the chlorella biological concentrate to OD with sterile water 680 is 1.3 algae liquid, add magnetic Fe to the algae liquid 3 o 4 Nanoparticles, add 0.3g magnetic Fe per liter of algae liquid 3 o 4 Nanoparticles, constant temperature oscillation 3d, get Chlorella cells and magnetic Fe 3 o 4 a polymer solution of nanoparticles;

[0031] (3) Add corn cob activated carbon to the polymer solution, stir and adsorb at room temperature for 11 hours, filter and wash to obtain the chlorella cells and magnetic Fe immobilized by corn cob activated...

Embodiment 2

[0036] A composite microalgae biosorbent microsphere, including Scenedesmus cells, magnetic Fe 3 o 4 Nanoparticles and Sodium Alginate. Its preparation method comprises the following steps:

[0037] (1) Cultivate Scenedesmus cells in BG11 medium for 6 days, then centrifuge at a speed of 5000rpm for 5min, remove the supernatant, and the bottom layer is the Scenedesmus biological concentrate;

[0038] (2) Adjust Scenedesmus biological concentrate to OD with sterile water 680 is 1.5 algae liquid, add magnetic Fe to the algae liquid 3 o 4 Nanoparticles, add 0.4g magnetic Fe per liter of algae liquid 3 o 4 Nanoparticles, shaken at constant temperature for 4 days, obtained Scenedesmus cells and magnetic Fe 3 o 4 a polymer solution of nanoparticles;

[0039] (3) Add corn cob activated carbon to the polymer solution, stir and adsorb at room temperature for 12 hours, filter and wash to obtain the fixed Scenedesmus cells and magnetic Fe 3 o 4 The polymer of nanoparticles, add...

Embodiment 3

[0044] The difference between Example 3 and Example 1 is that the adsorption pH is controlled at 4, and the others are the same as Example 1.

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Abstract

The invention relates to the technical field of waste water processing, and discloses a composite microalgae biosorbent microsphere and a method for adsorbing chromium in waste water. The composite microalgae biosorbent microsphere comprises microalgae cells, magnetic Fe3O4 nanoparticles, corncob activated carbon and sodium alginate. A polymer of microalgae cells and the magnetic Fe3O4 nanoparticles is absorbed by corncob activated carbon, and then is subjected to mixed embedding and fixing with sodium alginate to prepare the composite microalgae biosorbent microsphere. The composite microalgae biosorbent microsphere has the advantages of large adsorption capacity, fast adsorption rate, and simple and convenient operation, and contains the magnetic Fe3O4 nanoparticles, and rapid recovery of the adsorbent can be conveniently realized after processing wastewater. The composite microalgae biosorbent microsphere is used for the adsorption and removal of heavy metal ion chromium in the wastewater, and the good removal effect is achieved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a composite microalgae biosorbent microsphere and a method for adsorbing chromium in wastewater. Background technique [0002] Heavy metal chromium (Cr) pollution mainly comes from inferior cosmetic raw materials, leather preparations, chrome-plated parts of metal parts, industrial pigments, leather tanning, rubber and ceramic raw materials, etc. These pollution sources enter the water environment through industrial and domestic sewage discharges, which are harmful to human health and The ecological environment poses a great threat. [0003] Common heavy metal chromium (Cr) treatment methods include chemical precipitation, ion exchange, adsorption and other methods. The adsorption method for the removal of heavy metal pollutants in wastewater has the advantages of flexible and convenient operation process, advanced treatment, and recovery of heavy metal ions in wast...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F3/32C02F101/20
CPCB01J20/06B01J20/24C02F3/322B01J20/28009B01J20/28021C02F2101/20B01J2220/46B01J2220/4825
Inventor 高锋杨红丽侯慧巧阚家薇寿晔子张文静
Owner ZHEJIANG OCEAN UNIV
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