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

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Abstract

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.

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Authors and Affiliations

  1. CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China

    Hongwei Luo, Longfei Wang, Zhonghua Tong, Hanqing Yu & Guoping Sheng

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  1. Hongwei Luo
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  2. Longfei Wang
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  3. Zhonghua Tong
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  4. Hanqing Yu
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  5. Guoping Sheng
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Correspondence to Guoping Sheng.

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Luo, H., Wang, L., Tong, Z. et al. Approaching the binding between Cu(II) and aerobic granules by a modified titration and µ-XRF. Front. Environ. Sci. Eng. 10, 362–367 (2016). https://doi.org/10.1007/s11783-015-0803-0

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  • DOI: https://doi.org/10.1007/s11783-015-0803-0

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