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Effectiveness of Biochar and Aerobic Production in Preventing Arsenic Contamination in Rice

John Beeby

出版	ProQuest Information and Learning, 2022
URL	http://books.google.com.hk/books?id=XKxB0AEACAAJ&hl=&source=gbs_api

註釋

Arsenic contamination of groundwater and soils is ubiquitous, affecting more than 70 countries and hundreds of millions of people worldwide. Rice is the primary staple food for more than half of the world and accumulates ten times more inorganic arsenic than other grains. I investigated the ability of iron-enriched biochar to reduce arsenic uptake in rice and compared its effect to that of aerobic soil and growing rice varieties known to be lower accumulators of arsenic. Of these approaches, keeping the soil aerobic was most effective at reducing arsenic accumulation in rice grains. While iron-enriched biochar was able to reduce arsenate and arsenite in aqueous solutions, it was less effective at reducing arsenic uptake in rice in a pot experiment using arsenic-contaminated soil. Additional research is needed to determine the critical characteristics of the biochar, the enrichment process and the soil that will reduce arsenic uptake in rice.