Approaching the binding between Cu(II) and aerobic granules by a modified titration and µ-XRF

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• 作者：Hongwei Luo ; Longfei Wang ; Zhonghua Tong…
• 关键词：aerobic granules ; Cu(II) ; modified titration ; µ ; XRF analysis
• 刊名：Frontiers of Environmental Science & Engineering
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：10
• 期：2
• 页码：362-367
• 全文大小：818 KB
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• 作者单位：Hongwei Luo (1)
  Longfei Wang (1)
  Zhonghua Tong (1)
  Hanqing Yu (1)
  Guoping Sheng (1)
  
  1. CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
  
• 刊物主题：Environment, general;
• 出版者：Springer Berlin Heidelberg
• ISSN：2095-221X

文摘

Interactions between metals and activated sludge can substantially affect the fate and transport of heavy metals in wastewater treatment plants. Therefore, it is important to develop a simple, fast and efficient method to elucidate the interaction. In this study, a modified titration method with a dynamic mode was developed to investigate the binding of Cu(II), a typical heavy metal, onto aerobic granules. The titration results indicated that pH and ionic strength both had a positive effect on the biosorption capacity of the granular sludge. The µ-XRF results demonstrated that the distribution of metals on the granular surface was heterogeneous, and Cu showed strong correlations and had the same “hot spots” positions with other metal ions (e.g., Ca, Mg, Fe etc.). Ion exchange and complexing were the main mechanisms for the biosorption of Cu(II) by aerobic granules. These results would be beneficial for better understanding of Cu(II) migration and its fate in wastewater treatment plants. Keywords aerobic granules Cu(II) modified titration µ-XRF analysis