Study on treatment of coking wastewater by biofilm reactors combined with zero-valent iron process

Development of a novel integrated membrane system incorporated with an activated coke adsorption unit for advanced coal gasification wastewater treatment

“…Combined with the FEEM analysis, it can be concluded that the contaminants mainly included refractory humic acid and fulvic acid compounds. These compounds imposed significant fouling propensity on membrane system reported by numerous studies [26][27][28][29][30][31]. The fouling study was also performed in this work and the results will be presented in the following sections to reveal the effect of the additional adsorption unit on the fouling behavior of the subsequent membrane units.…”

Comparison between UV and VUV photolysis for the pre- and post-treatment of coking wastewater

“…A notable phenomenon was that, while the effluent irradiated by UV light always had a light-yellow color, the effluent became transparent after 12 hr VUV irradiation (Fig. 8) that humic substances might be the major refractory organic and color-causing compounds in coking wastewater effluent according to fluorescence excitation emission matrix (EEM) Xing et al, 2012) and 13 C nuclear magnetic resonance spectrometry ( 13 C NMR) analysis (Ni et al, 2008;Lai et al, 2009).…”

Effective removal of nemacide fosthiazate from an aqueous solution using zero-valent iron

“…ZVI is commonly used as a treatment technique for toxic and refractory waste water, such as bromoamine acid waste water, coking waste water, olive mill waste water, industrial waste water, and ABS resin waste water (Fan et al, 2009;Kallel et al, 2009;Ma and Zhang, 2008;Lai et al, 2009Lai et al, , 2012. Removal promoted by ZVI occurs in the following manners: a) direct transfer of electrons from ZVI to the adsorbed oxidized pollutants (Wang et al, 2006); b) ferrous ions and atomic hydrogen generated though anaerobic corrosion of ZVI by water (Shen et al, 2013;Lai et al, 2013); c) hydroxyl radicals generated in the presence of oxygen (Joo et al, 2004); d) iron hydroxides or oxides formed on the ZVI surface in Fe 0 eH 2 O system (Noubactep, 2008).…”