Qualitative and quantitative determination of halogenated derivatives in wastewater from coking plant

Abstract

Qualitative and quantitative determination of halogenated derivatives in wastewater from coking plant This paper describes a modification of the EPA 625 method for determination of chlorobenzenes and chlorophenols in wastewater containing pyridine bases. The method modification consists in introduction of an additional liquid/liquid extraction step for isolation, from the samples under investigation, of pyridine and quinoline bases, and also fractions consisting of benzene, its homologues, and its halogenated derivatives. The modified method has been used to determine the concentrations of chlorobenzenes and chlorophenols present in coking wastewater.

A microbial fuel cell–electro‐oxidation system for coking wastewater treatment and bioelectricity generation

“…These results reflect the importance of solution conductivity to reduce the bulk phase internal resistance for power generation in the system as well as facilitate transport of ions through the anode biofilm 31. On the other hand, compared with paper recycling wastewater containing mainly cellulose, the diverse aromatic compounds in coking wastewater are normally regarded as precursors of quinones 1, 32. The potential role of these aromatic compounds as electron shutters or mediators may accelerate electron transfer in the anode and consequently contribute to the higher power production from coking wastewater.…”

“…Coking wastewater containing phenolic compounds, ammonia, cyanide, thiocyanide, polynuclear aromatic hydrocarbons (PAHs), polycyclic nitrogen‐containing aromatics, oxygen‐ and sulfur‐containing heterocyclics and acyclic compounds, is generated from coal coking, coal gas purification, and by‐product recovery processes 1. Coking wastewater may produce numerous and long‐term environmental and ecological impacts 2–5.…”

“…Unfortunately, these processes often have relatively high biomass production and high operating cost in terms of energy. Additionally, the existence of refractory compounds in coking wastewater often leads to inefficiency of the biological processes because these compounds are chemically stable and resistant to microbiological attack 1–5. The application of electro‐oxidation (EO) to environmental pollution abatement has attracted attention due to its environmental compatibility, high efficiency, versatility, and amenability to automation 6, 7.…”

Biological removal of antiandrogenic activity in gray wastewater and coking wastewater by membrane reactor process

“…As mentioned before, some antiandrogenic phenols were detected in coking wastewater as well as its treatment system. 2,4-Dichlorophenol might contribute antiandrogenic activity of 5.0-39.5 ng FEQ/L in coking wastewater (Tamura et al, 2006;Czaplicka, 2003). 2-Naphthol was also found in a coking wastewater treatment system, with a concentration of 2.937 mg/L in the raw water and 5.948 μg/L in the discharged water (Zhang et al, 2010).…”

By-Side Impurities in Chloronaphthalene Mixtures of the Halowax Series: All 12 Chlorobenzenes

“…[19,20] Pentachlorobenzene (50%) and HCBz (13%) dominated amongst of all 12 congeners of chlorobenzene identified in flue gas and fly ash after municipal solid waste incineration. [24][25][26][27][28][29][30] Occupational exposure to technical mixtures of chloronaphthalenes but also of chlorobenzenes led to toxic outbreaks including chloracne. [23] Hexachlorobenzene is dioxin-like compound ubiquitous as persistent contaminant in the environment worldwide.…”