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Radiometric and environmental impacts of mill tailings at experimental plant processing unit, Allouga, Egypt
Environmental Forensics ( IF 1.8 ) Pub Date : 2019-12-03 , DOI: 10.1080/15275922.2019.1695020
N. M. Harpy 1 , S. E. El Dabour 1 , A. M. Sallam 2 , A. A. Nada 3 , A. E. El Aassy 1 , M. G. El Feky 1
Affiliation  

Abstract Uranium mining and ore processing are known to be harmful to the environment and human health if the waste generated is not managed properly. The aim of the present study is to determine the radiological indices in the mill tailings and review the possible attempts to utilize and minimize its hazardous effect. The activity concentrations of natural radionuclides, 238U, 232Th, 226Ra, and 40K have been measured by gamma spectrometry using HP-Ge detector. The average activity concentrations of 238U, 232Th, 226Ra, and 40K in the tailings wastes were 2071.8, 59.92, 6921.262, and 445. 57 Bq/kg respectively which are higher than the international average limit. The ranges of hazard indices such as Radium equivalent activity (Raeq), external hazard index (Hex), internal hazard index (Hin), γ-radiation hazard index Iγ, Dose rate (nGy/h) and annual effective dose equivalent (AED), were estimated. Uraniumm isotopic ratios in the ore –material and mill tailing samples indicate migration out of radionuclides to the surrounding environment causing contamination and many dangerous diseases. Fairly, all investigated tailing waste samples do not satisfy the universal standards, the studied wastes relatively still have high uranium contents and need reprocessing.

中文翻译:

埃及阿卢加实验工厂处理厂尾矿的辐射测量和环境影响

摘要 众所周知,如果产生的废物管理不当,铀矿开采和矿石加工会对环境和人类健康造成危害。本研究的目的是确定工厂尾矿中的放射性指数,并审查利用和尽量减少其危险影响的可能尝试。天然放射性核素 238U、232Th、226Ra 和 40K 的活度浓度已使用 HP-Ge 检测器通过伽马光谱法进行测量。尾矿废物中238U、232Th、226Ra和40K的平均活度浓度分别为2071.8、59.92、6921.262和445.57 Bq/kg,高于国际平均限值。镭当量活度(Raeq)、外部危害指数(Hex)、内部危害指数(Hin)、γ-辐射危害指数Iγ等危害指数范围,估计剂量率 (nGy/h) 和年有效剂量当量 (AED)。矿石材料和工厂尾矿样品中的铀同位素比率表明放射性核素迁移到周围环境,导致污染和许多危险疾病。公平地说,所有被调查的尾矿废物样品都不符合通用标准,所研究的废物中铀含量相对仍然较高,需要再处理。
更新日期:2019-12-03
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