Title:
METHOD FOR PREVENTING GROUNDWATER POLLUTION DUE TO NITRATE NITROGEN
Document Type and Number:
Japanese Patent JP2007245022
Kind Code:
A
Abstract:
To provide a method for preventing an increase of groundwater pollution due to nitrate nitrogen generated when polluted water resulting from livestock excretion infiltrates underground, at a low cost without maintenance for a long period of time.
A granular material containing sulfur and carbonates, and having an average particle size of 1-50 mm and a sulfur content of 50-90 wt.% is dispersed at an amount of 20-1,000 kg per m2in the soil into which the polluted water containing nitrate nitrogen or a nitrogen compound forming nitrate nitrogen in the soil infiltrates, which prevents the groundwater pollution due to nitrate nitrogen. If a carbonate or an iron oxide is dispersed together with the granular material, effect of pollution prevention is increased.
COPYRIGHT: (C)2007,JPO&INPIT
Inventors:
YAMADA KATSUHIRO
Application Number:
JP2006072728A
Publication Date:
September 27, 2007
Filing Date:
March 16, 2006
Assignee:
NIPPON STEEL CHEMICAL CO
International Classes:
C02F3/34; C02F3/00; C02F3/10
Attorney, Agent or Firm:
Katsuo Naruse
Tomohiro Nakamura
Eiichi Sano
