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Treatment of Actual Chemical Wastewater by a Heterogeneous Fenton Process Using Natural Pyrite

Author

Listed:
  • Liang Sun

    (State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China)

  • Yan Li

    (State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China)

  • Aimin Li

    (State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China)

Abstract

Wastewater from chemical plants has remarkable antibiotic effects on the microorganisms in traditional biological treatment processes. An enhanced Fenton system catalyzed by natural pyrite was developed to degrade this kind of wastewater. Approximately 30% chemical oxygen demand (COD) was removed within 120 min when 50 mmol/L H 2 O 2 and 10 g/L natural pyrite were used at initial pH from 1.8 to 7. A BOD 5 /COD enhancement efficiency of 210% and an acute biotoxicity removal efficiency of 84% were achieved. The COD removal efficiency was less sensitive to initial pH than was the classic Fenton process. Excessive amounts of pyrite and H 2 O 2 did not negatively affect the pyrite Fenton system. The amount of aniline generated indicated that nitrobenzene reduction by pyrite was promoted using a low initial concentration of H 2 O 2 (<5 mmol/L). Fluorescence excitation emission matrix analyses illustrated that H 2 O 2 facilitated the reduction by natural pyrite of organic molecules containing an electron-withdrawing group to electron-donating group. Thus, the Fenton-like process catalyzed by pyrite can remediate wastewater containing organic pollutants under mild reaction conditions and provide an alternative environmentally friendly method by which to reuse natural pyrite.

Suggested Citation

  • Liang Sun & Yan Li & Aimin Li, 2015. "Treatment of Actual Chemical Wastewater by a Heterogeneous Fenton Process Using Natural Pyrite," IJERPH, MDPI, vol. 12(11), pages 1-17, October.
    • Handle: RePEc:gam:jijerp:v:12:y:2015:i:11:p:13762-13778:d:57924
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    Citations

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    Cited by:

    1. Qu, Baolin & Zhu, Hongqing & Tian, Rui & Hu, Lintao & Wang, Jingxin & Liao, Qi & Gao, Rongxiang & Wang, Haoran, 2023. "Investigation of the impact of pyrite content on the terahertz dielectric response of coals and rapid recognition with kernel-SVM," Energy, Elsevier, vol. 285(C).
    2. Liang Sun & Dehao Hu & Ziyu Zhang & Xiaoyan Deng, 2019. "Oxidative Degradation of Methylene Blue via PDS-Based Advanced Oxidation Process Using Natural Pyrite," IJERPH, MDPI, vol. 16(23), pages 1-12, November.
    3. Meiqing Zhu & Lijun Wang & Yu Wang & Jie Zhou & Jie Ding & Wei Li & Yue Xin & Shisuo Fan & Zhen Wang & Yi Wang, 2018. "Biointeractions of Herbicide Atrazine with Human Serum Albumin: UV-Vis, Fluorescence and Circular Dichroism Approaches," IJERPH, MDPI, vol. 15(1), pages 1-16, January.

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