Heavy metal contamination of agricultural soil and countermeasures in Japan

Tomohito Arao, Satoru Ishikawa, Masaharu Murakami, Kaoru Abe, Yuji Maejima, Tomoyuki Makino

Research output: Contribution to journalReview articlepeer-review

138 Citations (Scopus)

Abstract

Many heavy metals exist in minute amounts in natural agricultural soil. However, when their amounts exceed a certain level due to pollutants brought from outside, soil contamination occurs and agricultural products become contaminated. There have been many cases in Japan of heavy metal contamination originating from old mines and smelters, and soil contamination of agricultural land has become a social issue. In particular, cadmium (Cd) is one of the most harmful heavy metals. If agricultural products absorb an excessive amount of Cd, they may adversely affect people's health, and therefore allowable concentrations are regulated by law. If agricultural land has become contaminated with Cd, measures for minimizing the absorption of Cd by agricultural crops are necessary; these include: (1) soil dressing, (2) water management (paddy field), (3) chemical cleaning of soil, (4) phytoextraction, and (5) use of different varieties and rootstock. Other heavy metals such as arsenic, lead, copper, zinc, and mercury also sometimes cause contamination of agricultural soil.

Original languageEnglish
Pages (from-to)247-257
Number of pages11
JournalPaddy and Water Environment
Volume8
Issue number3
DOIs
Publication statusPublished - 2010
Externally publishedYes

Keywords

  • Cadmium
  • Chemical washing method
  • Heavy metal pollution
  • Phytoremediation

ASJC Scopus subject areas

  • Environmental Engineering
  • Agronomy and Crop Science
  • Water Science and Technology

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