Amelioration of acidic soil using fly ash for mine revegetation in post-mining land
Akihiro Hamanaka1
Takashi Sasaoka1
Hideki Shimada1
Shinji Matsumoto2
1.Department of Earth Resources Engineering,Faculty of Engineering,Kyushu University,819-0395 Fukuoka,Japan2.Geological Survey of Japan,National Institute of Advanced Industrial Science and Technology(AIST),305-8567 Tsukuba,Japan
摘要：This paper described the use of fly ash for soil amelioration of acidic soils to promote plant growth.In mining sites,acid sulfate soils/rocks,which contain sulfide minerals(e.g.pyrite FeS2),have appeared as a result of overburden excavation.The excessively acidic condition inhibits plant growth due to the dissolution of harmful elements,such as Al,Fe,and Mn.Fly ash,an alkaline byproduct of coal combustion generated in thermal power plants is expected to be adopted to ameliorate acidic soils.However,the mixing ratio of fly ash must be considered because excessive addition of fly ash can have a negative impact on plant growth due to its physical/chemical properties.The pot trials using Acacia mangium demonstrate the evolution of plant growth with a 5％-10％addition of fly ash into acidic soil.When the acidic soil has a high potential for metal dissolution,the metal ions leached from the acidic soil are large,making it difficult to improve plant growth due to osmotic and ionic stress.This work suggests that the effects of fly ash on metal ions leached from the soil have to be considered for the amelioration of acidic soil.
机标关键词：soillandmineacidicameliorationpost-miningrevegetationusing
论文发表日期：2022-06-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：6( 201-206 )
英文信息