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Embedded nano iron/microbe microspheres and preparation method thereof

A technology of microbial microspheres and nano-iron, applied in the nano field, can solve the problems of insignificant synergy between nano-iron and microorganisms, difficult popularization and application of pollutants, low effective contact rate of nano-iron, etc., and achieves good biocompatibility, The effect of easy separation and small average particle size

Inactive Publication Date: 2011-03-30
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current technical level only stays at the stage of simple physical mixing of nano-iron and microorganisms. Although some achievements have been made in the removal of pollutants, the synergistic effect of nano-iron and microorganisms is not obvious in the whole process, resulting in the final microbial stability. Poor resistance, easy loss, easy inactivation, low effective contact rate between microorganisms and nano-iron, and low reaction efficiency, it is difficult to be popularized and applied in the in-situ remediation of actual pollutants

Method used

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  • Embedded nano iron/microbe microspheres and preparation method thereof
  • Embedded nano iron/microbe microspheres and preparation method thereof
  • Embedded nano iron/microbe microspheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of embedding agent sodium alginate solution

[0034] Dissolving sodium alginate particles in water and heating to a transparent state to obtain a sodium alginate solution with a mass percent content of 2%;

[0035] (2) Preparation of crosslinking agent calcium chloride solution

[0036] Calcium chloride powder is dissolved in water to obtain a calcium chloride solution with a molar concentration of 0.2mol / L;

[0037] (3) Preparation of nano-iron solution

[0038] Using liquid phase reduction method, strong reducing agent KBH 4 Reduced FeSO 4 ·7H 2 O gets Fe 0 , with Fe 0 Prepare a nano-iron solution with a molar concentration of 0.1g / L;

[0039] (4) Preparation of reaction solution A

[0040] Add bacterial solution and sodium alginate solution to the nano-iron solution, the volume ratio is 2:3:5, and then mechanically stir for 10 minutes to make the mixing uniform and sufficient to obtain the reaction solution A;

[0041] (5) Preparation of reac...

Embodiment 2

[0047] (1) Preparation of embedding agent sodium alginate solution

[0048] Dissolving sodium alginate particles in water and heating to a transparent state to obtain a sodium alginate solution with a mass percent content of 3.5%;

[0049] (2) Preparation of crosslinking agent calcium chloride solution

[0050] Calcium chloride powder is dissolved in water to obtain a calcium chloride solution with a molar concentration of 0.15mol / L;

[0051] (3) Preparation of nano-iron solution

[0052] Using liquid phase reduction method, strong reducing agent KBH 4 Reduced FeSO 4 ·7H 2 O gets Fe 0 , with Fe 0 Prepare the nano-iron solution whose molar concentration is 0.3g / L;

[0053] (4) Preparation of reaction solution A

[0054] Add bacterial solution and sodium alginate solution to the nano-iron solution, the volume ratio is 2:3:5, and then mechanically stir for 15 minutes to make the mixing uniform and sufficient to obtain the reaction solution A;

[0055] (5) Preparation of ...

Embodiment 3

[0061] (1) Preparation of embedding agent sodium alginate solution

[0062] Dissolving sodium alginate particles in water and heating to a transparent state to obtain a sodium alginate solution with a mass percent content of 1.5%;

[0063] (2) Preparation of crosslinking agent calcium chloride solution

[0064] Calcium chloride powder is dissolved in water to obtain a calcium chloride solution with a molar concentration of 0.3mol / L;

[0065] (3) Preparation of nano-iron solution

[0066] Using liquid phase reduction method, strong reducing agent KBH 4 Reduced FeSO 4 ·7H 2 O gets Fe 0 , with Fe 0 Prepare a nano-iron solution with a molar concentration of 0.1g / L;

[0067] (4) Preparation of reaction solution A

[0068] Add bacterial liquid and sodium alginate solution to the nano-iron solution, the volume ratio is 2:3:5, and then mechanically stir for 8 minutes to make the mixing uniform and sufficient to obtain the reaction solution A;

[0069] (5) Preparation of react...

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Abstract

The invention relates to embedded nano iron / microbe microspheres and a preparation method thereof. The embedded nano iron / microbe microspheres are formed under the gelation action of calcium alginate. An embedding method is adopted in the prepared nano iron / microbial microspheres; nano iron and microbe are immobilized in the microspheres together by using the cross-linking and curing effects of a sodium alginate embedding agent and a calcium chloride cross linker; and the prepared microspheres have uniform particle size distribution, small average particle size and large specific surface area, and can be widely applied in the fields of environmental pollution treatment and environmental remediation.

Description

technical field [0001] The invention relates to the field of nanotechnology, in particular to an embedded nano-iron / microbe microsphere and a preparation method thereof. Background technique [0002] At present, microorganisms have been widely used in the remediation of groundwater pollutants. According to their different electron donors, they are mainly divided into heterotrophic microorganisms and autotrophic microorganisms. The dependence of heterotrophic microorganisms on organic matter limits their application in groundwater remediation, while autotrophic microorganisms usually use H 2 as an electron donor, but H 2 The flammable and explosive characteristics also bring difficulties to practical applications. Therefore, through external intensified treatment measures, hydrogen production by corrosion of molten iron can provide sufficient electron donors for autotrophic microorganisms, and under the synergistic effect of the two, the degradation of pollutants is acceler...

Claims

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Application Information

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IPC IPC(8): C12N11/10C12N11/04
Inventor 金朝晖夏宏彩李铁龙张娜李宁
Owner NANKAI UNIV
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