Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (S1): S010308

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Radiolysis of HA in aqueous solutions using gamma rays

JIA Wenbao1 WEI Yonghong1,* LIU Jianguo2 LING Yongsheng1 HEI Daqian1 SHAN Qing1 ZENG Jie1   

  1. 1College of materials science and technology, Nanjing University of Aeronautics and Astronautics,Nanjing 211100, China 2Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China
  • Contact: WEI Yonghong E-mail:wei_yong_hong@163.com
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JIA Wenbao, WEI Yonghong, LIU Jianguo, LING Yongsheng, HEI Daqian. Radiolysis of HA in aqueous solutions using gamma rays.Nuclear Science and Techniques, 2013, 24(S1): S010308

Abstract:

The present work investigated the radiolysis of HA (Humic acids) in aqueous solutions and under gamma radiation. Absorbances at the range of 200?800 nm and chemical oxygen demand (COD) were used to characterize the degree of degradation of HA. The results indicated that absorbances and the concentrations of COD were decreased with increasing of irradiation dose while with increasing of irradiation dose the pH of the solutions was decreased at first and then increase. In addition, the effects of initial pH and primary solution concentrations on HA degradation were also investigated. It is shown that the higher primary solution concentrations, the lower degradation efficiency under the same irradiation dose. And the degradation efficiency of HA under neutral conditions is better than in acidic or alkaline conditions.

Key words: Radiolysis, Gamma rays, HA