Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita Tama, Kawasaki, Kanagawa, 214-8571, Japan.
Applied Chemistry Course, Graduate School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama, Kawasaki, Kanagawa, 214-8571, Japan.
Anal Sci. 2021 Nov 10;37(11):1565-1570. doi: 10.2116/analsci.21P022. Epub 2021 May 7.
The chemical states of heavy metals and radioactive Cs were estimated in fly ash sampled at Fukushima prefecture, Japan. Estimating the speciation of incinerator fly ash is important to ensure an appropriate and efficient management of fly ash generated from disaster-related waste. In this study, fly ash collected at a waste incineration facility in Fukushima prefecture was treated using a sequential extraction test. The test results indicated that the solubility behavior of radioactive Cs was similar to that of NaCl and KCl, and approximately 60% of radioactive Cs was included as water-soluble chloride compounds in the fly ash sample. Most heavy metals eluted in three fractions, in the extraction steps for carbonate-bound, free oxide, and bound to organic matter species. The chemical states of elements in the three non-water-soluble fractions and residue showed minimal elution into the environment. Therefore, most heavy metals in the fly ash exhibited minimal elution into the environment.
本研究采用连续提取试验对日本福岛县垃圾焚烧厂采集的飞灰样本中的重金属和放射性 Cs 的化学形态进行了评估。评估焚烧飞灰的形态对于确保对与灾害相关的废物产生的飞灰进行适当且有效的管理非常重要。试验结果表明，放射性 Cs 的溶解行为与 NaCl 和 KCl 的相似，约 60%的放射性 Cs 以水溶性氯化物化合物的形式存在于飞灰样品中。大多数重金属在碳酸盐结合、游离氧化物和与有机物结合的三个提取步骤中洗脱。三种非水溶性部分和残渣中元素的化学形态很少有浸出到环境中。因此，飞灰中的大多数重金属很少有浸出到环境中。
