Method for eliminating environmental pollutants

Details Method for eliminating environmental pollutants Method for eliminating environmental pollutants

1996-11-29

1999-04-27

Cintins, Ivars

Liquid purification or separation

Processes

Treatment by living organism

210679, 210691, 210747, C02F 128

Patent

active

058977783

ABSTRACT:
A porous absorbent made of a filter, a filter material or a sponge material is inserted into a polluted part of soil or groundwater containing environmental pollutants such as chlorinated solvents or heavy metal ions. The porous absorbent is inserted into the polluted environment such that its one end comes into contact with the pollutants and the other end is exposed to air. The porous absorbent allows the pollutants absorbed thereby to rise up to its air-exposed end through the vaporizing activity of the pollutant themselves and of the water containing them. The pollutants are allowed to evaporate from the air-exposed end to be dissipated into the air, or to concentrate at the air-exposed end for later removal. Further, microorganisms fixed to the porous absorbent are used to decompose pollutants for removal, or to absorb pollutants for removal. Those pollutant eliminating methods allow efficient elimination of even highly concentrated pollutants at a low cost without requiring complicated processes. The method based on the use of microorganisms is further advantageous in that it is less stressful to the environment and biologically safer.

REFERENCES:
patent: 4839051 (1989-06-01), Higa
patent: 4882071 (1989-11-01), Bench et al.
patent: 5043076 (1991-08-01), Alexander
patent: 5057227 (1991-10-01), Cohen
patent: 5116515 (1992-05-01), Selesnick
patent: 5264134 (1993-11-01), McCamy

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