Using biochar for reduction of heavy metal uptake by crops in heavy metal contaminated agricultural fields

2014 Fiscal Year Final Research Report

• Project/Area Number: 23780254
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Irrigation, drainage and rural engineering/Rural planning
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: KAMEYAMA KOJI 独立行政法人農業・食品産業技術総合研究機構, 農村工学研究所・農地基盤工学研究領域, 主任研究員 (90414432)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: バイオ炭 / 土壌改良 / カドミウム / 不溶化 / 炭素貯留

Outline of Final Research Achievements

The bioavailability of heavy metal in agricultural soils is a great health concern due to potential risks through exposure to agricultural foods produced in heavy metal contaminated fields. Biochars are known to be effective in the adsorption of heavy metals. Thus, the objective of this study was to investigate the effects of biochar incorporation on crop cadmium uptake in a cadmium-contaminated agricultural soil. Our experimental results indicated that biochars, especially chicken manure-derived biochar, can immobilize soil cadmium chiefly through the precipitation reaction associated with increasing soil pH. Consequently, cadmium bioavailability in cadmium-contaminated agricultural soils can be decreased with incorporation of biochars.

Free Research Field

土壌物理，農地工学，炭化