14:45 〜 15:00
[AHW28-16] Groundwater pollution of Arsenic and its potential solution
キーワード：arsenic pollution, black foot disease, groundwater, nanomaterials
Arsenic contamination poses a severe public health and environmental crisis, affecting over 100 million people worldwide. Regions like Bangladesh and Taiwan are particularly vulnerable due to the reliance on arsenic-laden groundwater for drinking, leading to chronic health issues such as blackfoot disease, which can result in debilitating limb amputations. The environmental behavior of arsenic is complex, governed by redox transformations between its toxic trivalent [As(III)] and less toxic pentavalent [As(V)] states, with humic substances playing a pivotal role in its mobility and bioavailability.
This study integrates field assessments, biomonitoring, and bioremediation strategies to address arsenic pollution. Groundwater samples from Moyna and Ardebok villages in India were analyzed alongside human biomarkers, including hair, nails, and urine, revealing strong correlations between arsenic exposure and accumulation in the body. These findings highlight the urgent need for effective mitigation strategies.
In pursuit of sustainable solutions, we isolated twelve arsenic-resistant bacterial strains from agricultural soils in southwestern Taiwan. Belonging to the genera Pseudomonas, Acinetobacter, Klebsiella, and Comamonas, these strains exhibited robust As(III) oxidation capabilities and high As(III)-oxidase activity across diverse pH and temperature ranges, demonstrating their potential for bioremediation in contaminated environments.
Furthermore, the study investigates the efficacy of natural iron ores and engineered iron oxide nanomaterials in arsenic removal. These materials show promise in adsorbing and immobilizing arsenic, offering a complementary approach to biological remediation. Together, our findings provide a comprehensive framework for mitigating arsenic pollution through an integrated strategy that combines environmental monitoring, microbial bioremediation, and advanced material technologies.
This study integrates field assessments, biomonitoring, and bioremediation strategies to address arsenic pollution. Groundwater samples from Moyna and Ardebok villages in India were analyzed alongside human biomarkers, including hair, nails, and urine, revealing strong correlations between arsenic exposure and accumulation in the body. These findings highlight the urgent need for effective mitigation strategies.
In pursuit of sustainable solutions, we isolated twelve arsenic-resistant bacterial strains from agricultural soils in southwestern Taiwan. Belonging to the genera Pseudomonas, Acinetobacter, Klebsiella, and Comamonas, these strains exhibited robust As(III) oxidation capabilities and high As(III)-oxidase activity across diverse pH and temperature ranges, demonstrating their potential for bioremediation in contaminated environments.
Furthermore, the study investigates the efficacy of natural iron ores and engineered iron oxide nanomaterials in arsenic removal. These materials show promise in adsorbing and immobilizing arsenic, offering a complementary approach to biological remediation. Together, our findings provide a comprehensive framework for mitigating arsenic pollution through an integrated strategy that combines environmental monitoring, microbial bioremediation, and advanced material technologies.