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 pro

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

Example Embodiment

[0032] Example 1:

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

[0034] The sodium alginate particles are dissolved in water and heated to a transparent state to obtain a sodium alginate solution with a mass percentage of 2%;

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

[0036] Dissolve calcium chloride powder 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 Reduce FeSO 4 ·7H 2 O gets Fe 0 , Use Fe 0 Prepare a nano iron solution with a molar concentration of 0.1g / L;

[0039] (4) Preparation of reaction solution A

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

[0041] (5) Preparation of reaction solutio...

Example Embodiment

[0046] Example 2:

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

[0048] Dissolve sodium alginate particles in water and heat to a transparent state to obtain a sodium alginate solution with a mass percentage of 3.5%;

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

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

[0051] (3) Preparation of nano iron solution

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

[0053] (4) Preparation of reaction solution A

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

[0055] (5) Preparation of reaction solution B...

Example Embodiment

[0060] Example 3:

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

[0062] Dissolve the sodium alginate particles in water and heat to a transparent state to obtain a sodium alginate solution with a mass percentage of 1.5%;

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

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

[0065] (3) Preparation of nano iron solution

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

[0067] (4) Preparation of reaction solution A

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

[0069] (5) Preparation of reaction solution...

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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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