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Application of arsenite oxidizing bacterium in trivalent arsenic polluted rice paddy soil colonization

A technology of arsenic oxidizing bacteria and trivalent arsenic, which is applied in the field of environmental chemistry and environmental microbiology, and can solve the problems that the migration of trivalent arsenic cannot be inhibited and the efficiency of trivalent arsenic is low

Active Publication Date: 2018-03-27
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the reducing environment of flooded rice planting, the efficiency of chemical conversion to oxidize trivalent arsenic is low, and the migration of unoxidized trivalent arsenic in the soil cannot be inhibited. In practice, it is urgent to solve this technical bottleneck, from arsenic pollution It is a good choice to screen high-efficiency arsenic-oxidizing bacteria in soil and apply them

Method used

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  • Application of arsenite oxidizing bacterium in trivalent arsenic polluted rice paddy soil colonization
  • Application of arsenite oxidizing bacterium in trivalent arsenic polluted rice paddy soil colonization
  • Application of arsenite oxidizing bacterium in trivalent arsenic polluted rice paddy soil colonization

Examples

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Effect test

Embodiment 1

[0029] Example 1: Effect of white fungus culture medium waste on trivalent arsenic oxidation rate of Achromobacter xylosoxidans YYS001

[0030] Using the rice field soil of Fujian Agriculture and Forestry University as the research material, referring to the concentration of arsenic pollutants in the arsenic-contaminated soil at the foot of Zijin Mountain in Shanghang County, Fujian Province (105 mg / kg), 100 mg / kg trivalent arsenic was added to Fujian Agriculture and Forestry University In paddy field soil, trivalent arsenic-contaminated soil was prepared. According to the inoculation ratio of 0.01mL / g soil, the YYS001 bacterial suspension was inoculated in the trivalent arsenic-contaminated paddy soil, and then the white fungus culture medium waste was added, and four concentration gradients were set up, namely: 0.00, 0.01, 0.03 and 0.05 g / g soil, to investigate the effect of the proportion of white fungus culture medium waste on the effect of YYS001 on the accelerated oxida...

Embodiment 2

[0036] Example 2: Effect of white fungus culture medium waste on the colonization of Achromobacter xylosoxidans YYS001 in trivalent arsenic-contaminated paddy soil

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Abstract

The invention provides an arsenite oxidizing bacterium and application of the arsenite oxidizing bacterium in trivalent arsenic polluted rice paddy soil colonization. The bacterium is achromobacter xylosoxidans YYS001, which is preserved in China General Microbiological Culture Collection Center on August 31, 2017, and has the preservation number being CGMCC NO. 14583. The colonization of the bacterial strain in trivalent arsenic polluted rice paddy soil is the premise of playing a role in high-efficiently arsenic oxidizing ability.

Description

technical field [0001] The invention belongs to the technical fields of environmental chemistry and environmental microorganisms, and in particular relates to an arsenic oxidizing bacterium and its application in the colonization of trivalent arsenic-polluted paddy field soil. Background technique [0002] Arsenic is a highly toxic metalloid element. Long-term exposure to arsenic can cause lung, peripheral nerve, skin or cardiovascular damage. Long-term consumption of arsenic-contaminated rice can cause skin cancer, bladder cancer, liver cancer or lung cancer. The toxicity of arsenic pollutants is closely related to its form. The five common forms of arsenic in rice field soils (namely: trivalent arsenic [As(III)], pentavalent arsenic [As(V)], monomethyl arsenic [MMA(V) ], dimethylarsenic [DMA(V)] and trimethylarsenic oxide [TMAO(V)]), the order of toxicity is: As(III)>>As(V)>MMA(V)>DMA( V)>TMAO(V). Among them, As(III) is a strong carcinogen. A large number...

Claims

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Application Information

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IPC IPC(8): C12N1/20C12N1/02C09K17/32C12R1/025C09K101/00
CPCC09K17/32C09K2101/00C12N1/02C12N1/205C12R2001/025
Inventor 杨桂娣叶惠闽帅培育王开腾杨孝军林文雄
Owner FUJIAN AGRI & FORESTRY UNIV
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