title: Evaluation of the potential of p-nitrophenol degradation in dredged sediment by pulsed discharge plasma.
abstract: Hazardous pollutants in dredged sediment pose great threats to ecological environment and human health. A novel approach, named pulsed discharge plasma (PDP), was employed for the degradation of p-nitrophenol (PNP) in dredged sediment. Experimental results showed that 92.9% of PNP in sediment was smoothly removed in 60 min, and the degradation process fitted the first-order kinetic model. Roles of some active species in PNP degradation in sediment were studied by various gas plasmas, OH radical scavenger, hydrated electron scavenger and O2(·-) scavenger; and the results presented that O3, OH radical, eaq(-) and O2(·-) all played significant roles in PNP removal, and eaq(-) and O2(·-) mainly participated in other oxidising active species formation. FTIR analysis showed that PNP molecular structure was destroyed after PDP treatment. The main degradation intermediates were identified as hydroquinone, benzoquinone, phenol, acetic acid, NO2(-) and NO3(-). PNP degradation pathway in dredged sediment was proposed. It is expected to contribute to an alternative for sediment remediation by pulse discharge plasma.
authors.affiliation: College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, PR China. Electronic address: wangtiecheng2008@126.com.
authors.forename: Tiecheng
authors.initials: T
authors.lastname: Wang
authors.affiliation: College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, PR China.
authors.forename: Guangzhou
authors.initials: G
authors.lastname: Qu
authors.affiliation: Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
authors.forename: Qiuhong
authors.initials: Q
authors.lastname: Sun
authors.affiliation: College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, PR China.
authors.forename: Dongli
authors.initials: D
authors.lastname: Liang
authors.affiliation: College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, PR China.
authors.forename: Shibin
authors.initials: S
authors.lastname: Hu
mesh_terms: D019015:Geologic Sediments / Q000737:chemistry*; D009596:Nitrophenols / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*
chemical_list: D009596:Nitrophenols; D012989:Soil Pollutants; C024836:4-nitrophenol
keywords: Dredged sediment; Pulse discharge plasma; Sediment remediation; p-Nitrophenol