Efficient treatment of diazodinitrophenol industrial wastewater by a sequential zero-valent aluminum reduction- persulfate oxidation process

YANG Zhen; LI Yang; YANG Shiying

doi:10.19965/j.cnki.iwt.2023-0286

Gongye shui chuli (Apr 2024)

Efficient treatment of diazodinitrophenol industrial wastewater by a sequential zero-valent aluminum reduction- persulfate oxidation process

YANG Zhen,
LI Yang,
YANG Shiying

Affiliations

YANG Zhen: Key Laboratory of Marine Environment and Ecology Ministry of Education, Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
LI Yang: Key Laboratory of Marine Environment and Ecology Ministry of Education, Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
YANG Shiying: Key Laboratory of Marine Environment and Ecology Ministry of Education, Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China

DOI: https://doi.org/10.19965/j.cnki.iwt.2023-0286
Journal volume & issue: Vol. 44, no. 4
pp. 98 – 104

Abstract

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Diazodinitrophenol (DDNP) is a widely used and powerful initiating explosive, and the production of a unit mass of DDNP generates 200-300 times more industrial wastewater containing DDNP and its derivatives. DDNP is highly toxic, stable and resists biodegradation. Furthermore, due to a strong electron-absorbing nitro group in its structure, DDNP has antioxidant property that makes it difficult to degrade completely even by single advanced oxidation technique. A sequential reduction-oxidation process was developed using modified zero-valent aluminum (C@mZVAl) and sodium persulfate (Na2S2O8) and the degradation performance of the combined system on DDNP was investigated. The results revealed that the combination of C@mZVAl reduction and Na2S2O8 oxidation could effectively treat industrial DDNP wastewater with DDNP of (1 050±15) mg/L without additional pretreatments such as dilution or pH adjustment, and the effect of treatment was significantly better than that of oxidation or reduction processes alone. The reduction stage reaction rate could be sped up by adding more C@mZVAl, and the elimination rate of DDNP and COD could be further enhanced by adding more Na2S2O8. When the initial mass concentration of DDNP was (1 050±15) mg/L, 8 g/L C@mZVAl in the reduction stage combined with 10 mmol/L Na2S2O8 in the oxidation stage for the reaction could lead to DDNP degradation rate of up to 96.81% and COD removal rate of up to 81.20% with a clear efflent. Compared with other current DDNP treatment processes, the modified zero-valent aluminum (C@mZVAl) combined with sodium persulfate (Na2S2O8) process has the advantages of high efficiency, simple operation, and low consumption of chemicals, which provides a new idea for the treatment of DDNP and other types of antioxidant-organic industrial wastewater.

Published in Gongye shui chuli

ISSN: 1005-829X (Print)
Publisher: Editorial Office of Industrial Water Treatment
Country of publisher: China
LCC subjects: Technology: Environmental technology. Sanitary engineering
Website: http://www.iwt.cn/EN/home

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