Catalytic Degradation of Diatrizoate by Persulfate Activation with Peanut Shell Biochar-Supported Nano Zero-Valent Iron in Aqueous Solution

Jian Xu, Xueliang Zhang, Cheng Sun, Huan He, Yuxuan Dai, Shaogui Yang, Yusuo Lin, Xinhua Zhan, Qun Li and Yan Zhou
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Jian Xu: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
Xueliang Zhang: Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China
Cheng Sun: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
Huan He: School of Environment, Nanjing Normal University, Nanjing 210023, China
Yuxuan Dai: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
Shaogui Yang: School of Environment, Nanjing Normal University, Nanjing 210023, China
Yusuo Lin: Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China
Xinhua Zhan: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Qun Li: Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China
Yan Zhou: Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China

IJERPH, 2018, vol. 15, issue 9, 1-18

Abstract: An emerging pollutant, diatrizoate (DTZ) has been frequently detected in aqueous solution. Unique reticular peanut shell biochar (BC)-supported nano zero-valent iron (nZVI) composite (nZVI/BC) was successfully synthesized and used as a catalyst for activating persulfate (PS) to promote the removal of DTZ. The structure and morphology of the nanocomposite materials were characterized by scanning electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller measurements, and Fourier transform infrared spectroscopy. The degradation of DTZ (20 mg L −1 ) was achieved by activating PS with the nanocomposite material. The removal of DTZ reached nearly 100% using 25 mM PS and 0.45 g L −1 nZVI/2BC (mass ratio of nZVI and BC at 1:2) nanocomposite material at pH 3.0 and 25 °C. Influencing factors, such as dosages of nZVI/2BC and PS, temperature, and pH were also investigated. The mechanisms of PS activation with nZVI/2BC were discussed, including BC property, electron transfer, and the identification of free radicals in the reaction. The findings demonstrated that nZVI/BC-PS (peanut shell BC-supported nZVI activating PS) is a promising material for the treatment of refractory organic pollutants.

Keywords: nano zero-valent iron; peanut shell biochar; persulfate activated; diatrizoate; degradation (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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