Publications by authors named "Yi Huang-Takeshi Kohda"
Article Synopsis
- Pteris cretica is a fern that can absorb high levels of arsenic (As) and the mechanisms of its uptake in hydroponic systems were studied.
- A modified hydroponic system was used to minimize plant differences and assess how As uptake and movement within the plant were influenced by initial As concentration.
- Both short-term and long-term experiments showed that rhizomes are crucial for regulating arsenic movement from roots to fronds, with the fern consistently removing about 1 mg/d of As from a hydroponic solution.
Phytoremediation is a cost-effective and eco-friendly alternative method for arsenic (As) contaminated water treatment. This study conducted a two-year year-round field study (cycle1 and cycle2) in a temperate area (Sendai, Japan) using small As-hyperaccumulator Pteris vittata seedlings to reduce pre-cultivation time and associated costs. The number of seedlings was changed from 256 in the cycle1 period to 165 in the cycle2 period to evaluate the As removal efficiency of P.
View Article and Find Full Text PDFIn this study, the phytoremediation potential of tropical and subtropical arsenic (As) hyperaccumulating fern Pteris vittata in an As contaminated farmland field near an abandoned goldmine was investigated. The tested field is located in a subarctic area of northeast Japan. This study was aimed at decreasing the risk of As in the soil (water-soluble As) with nurturing the soil and respecting the plant life cycle for the sustainable phytoremediation for 8 years.
View Article and Find Full Text PDFInfluence of low temperature on comparative arsenic accumulation and release by three hyperaccumulators.
J Environ Sci Health A Tox Hazard Subst Environ Eng
December 2021
Article Synopsis
- The study investigates how temperature affects arsenic (As) accumulation in three hyperaccumulator fern species, focusing on their remediation potential in contaminated environments.
- Experimentation was conducted with ferns exposed to 5 mg/L As over a temperature range of 25°C to 5°C for 15 days, revealing that lower temperatures hindered As accumulation, especially at 5°C.
- The findings indicate that temperature is a crucial factor in using ferns for phytoremediation, and one fern species showed the best performance for treating As-contaminated water in cooler climates.
Pteris vittata is an arsenic (As) hyperaccumulator plant that accumulates a large amount of As into fronds and rhizomes (around 16,000 mg/kg in both after 16 weeks hydroponic cultivation with 30 mg/L arsenate). However, the sequence of long-distance transport of As in this hyperaccumulator plant is unclear. In this study, we used a positron-emitting tracer imaging system (PETIS) for the first time to obtain noninvasive serial images of As behavior in living plants with positron-emitting As-labeled tracer.
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