TIME TRENDS AND SOURCE FOR DIOXINS IN SEDIMENTS IN A LARGE-SCALE RICE PRODUCTION AREA, NIIGATA, JAPAN

• SAKAI Mizuki

  社団法人 土木学会 新潟大学大学院 自然科学研究科

• FUKUMURA Kinumi

  新潟大学大学院

• KAJIHARA Hideo

  新潟大学大学院 自然科学研究科

• TAKAHASHI Yukio

  社団法人 土木学会 新潟大学 工学部建設学科

• NAKADAIRA Hiroto

  新潟大学大学院 医歯学総合研究科

• YAMAMOTO Masaharu

  新潟大学大学院 医歯学総合研究科

Bibliographic Information

Other Title

• 新潟平野下流域におけるダイオキシン類汚染の歴史的変遷

Abstract

The age of a sediment core in Toyano lagoon was measured using radioisotope technique, and dioxins (TCDDs/Fs and co-PCB) amounts were measured. TEQs increased with time, reached its maximum in 1968 and decreased after that. The TEQs of layers from 1960 to 1975 exceeded the Japan environmental criteria for sediments, 150pgTEQ/g. Principal component analysis showed that dioxins from PCP, CNP and PCB products were the principal components. TCDDs/Fs from PCP and CNP accounted for almost all TEQ, and most of co-PCB came from PCB products used past. The results tell us that today's dioxins' pollution comes from the chemicals used not now but past.

Journal

• Doboku Gakkai Ronbunshu

  Doboku Gakkai Ronbunshu 2004 (769), 1-9, 2004-08-22

  Japan Society of Civil Engineers

Keywords

• PCDD/DFs and co-PCB
• sediment core
• time trend and source
• principal component analysis

Details

• CRID: 1390001205602588416
• NII Article ID: 130003984813
• DOI: 10.2208/jscej.2004.769_1
• ISSN: 18827187
• ISSN: 02897806
• Web Site: https://www.jstage.jst.go.jp/article/jscej1984/2004/769/2004_769_1/_pdf
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed