Treatment of azo dye Acid Orange 7 containing wastewater using up-flow constructed wetland with and without supplementary aeration

Dye Waste Treatment

“…The treatment performance of Acid Orange 7 containing wastewater by using up-flow constructed wetland (UFCW) at different Acid Orange 7 concentrations was investigated [102]. Various concentrations of AO7, from 50 to 100 mg/L, had an effect on the performance in biodegradation of organic matter and nitrification in the non-aerated wetland reactor as well as denitrification and decolorization in the aerated wetland reactor.…”

Spectroscopic Investigations of (E)-5-(2-Phenyldiazenyl)-2-Hydroxybenzaldehyde Using DFT Method

“…The azo benzene (1) ring moiety is coplanar [C2-C3-N12=N13=179.99 ˚] and [C4-C3-N12=N13=0 ˚] and phenol (2) ring is also coplanar with the azo chromophore [N13=N12-C14-C16=180 ˚] and [N13=N12-C14-C15=0 ˚]. Similarly, the OH and CHO groups are also coplanar with the benzene (2) ring [C19-C21-O23-H24=180 ˚ and C17-C21-O23-H24=0 ˚] and [C21-C17-C25=O27=179.99 ˚ and C15-C17-C25=O27=0 ˚] respectively.…”

“…The -N=N-azo group is the chromophore responsible for the color of these compounds [1]. The azo compounds are most widely used class of dyes due to their versatile application in various fields such as the dyeing of textile fibers, the coloring of different materials, colored plastics, biological and medical studies, and advanced application in organic synthesis [2][3][4]. Aromatic and heteroaromatic azo compounds constitute the largest and the most diverse group of synthetic dyes with application not only as textile colorants but in many other industrial fields for coloring different substrates, biological-medical studies, in the field of non-linear optics and optical data storage [5][6][7].…”

Aerobic decolorization, degradation and detoxification of azo dyes by a newly isolated salt-tolerant yeast Scheffersomyces spartinae TLHS-SF1

“…Azo dyes represent the most common group of synthetic dyes constituting 60-70% of more than 10,000 dyes used in textile industry (Ong et al, 2010). It is estimated that about 2% and 10-15% of azo dyes are lost during manufacture and dyeing processes, respectively (Pearce et al, 2003).…”