Aerobic degradation of acid orange 7 in a vertical-flow constructed wetland

Water Research
L C DaviesSusete Martins-Dias

Abstract

Biological, aerobic degradation of an azo dye and of the resultant, recalcitrant, aromatic amines in a constructed wetland (CW) was demonstrated for the first time. A vertical-flow CW, planted with Phragmites sp. was fed with 127 mgl(-1) of acid orange 7 (AO7) at hydraulic loads of 28, 40, 53 and 108 l m(-2) day(-1). Color removal efficiencies of up to 99% clearly demonstrate cleavage of the azo bond, also confirmed by the similar AO7 removal and SO(4)(2-) release rates revealing that adsorption onto the matrix was constant. The positive redox potential at the outlet demonstrates that aerobic conditions were present. Chemical oxygen demand and total organic carbon removal efficiencies of up to 93% were also indicative of AO7mineralization. The degradation of sulfanilic acid was confirmed by the presence of NO(3)(-), SO(4)(2-) and secondary metabolites, which suggest at least two degradation pathways leading to a common compound, 3-oxoadipate.

References

Nov 1, 1986·Applied and Environmental Microbiology·B NörtemannH J Knackmuss
May 2, 2000·Applied and Environmental Microbiology·S SchulzA M Cook
Mar 10, 2001·Applied Microbiology and Biotechnology·K PereiK L Kovács
Jan 25, 2002·Chemosphere·Michael F CoughlinPaul L Bishop
Nov 19, 2003·Biotechnology Advances·U StottmeisterH Moormann
Aug 27, 2004·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Carla W ScheerenAyrton F Martins

❮ Previous
Next ❯

Citations

Dec 3, 2013·Environmental Science and Pollution Research International·Hui Han BayZaharah Ibrahim
Apr 9, 2010·Applied Biochemistry and Biotechnology·Alfredo Ruiz-AriasJuvencio Galíndez-Mayer
Jun 19, 2013·Preparative Biochemistry & Biotechnology·V AranganathanT Palvannan
Jan 22, 2013·Environmental Science and Pollution Research International·Chi Kim LimZaharah Ibrahim
May 15, 2012·Journal of Hazardous Materials·Yuanyuan QuJiti Zhou
Mar 6, 2007·Bioresource Technology·Cátia C CariasSusete Martins-Dias
Oct 7, 2014·Journal of Environmental Management·Heng-Chong TeeRohana Adnan
Dec 15, 2010·Journal of Hazardous Materials·Shiying YangLeilei Wang
Dec 27, 2017·International Journal of Environmental Research and Public Health·Shixiong ShengLin Huang
Dec 23, 2017·Environmental Science and Pollution Research International·Amjad Hussein, Miklas Scholz
Nov 8, 2017·Environmental Science and Pollution Research International·Dina A Yaseen, Miklas Scholz
Apr 24, 2020·Ecotoxicology and Environmental Safety·Feiyue LiXiangyang Gui

❮ Previous
Next ❯

Related Concepts

Related Feeds

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.

Related Papers

Water Science and Technology : a Journal of the International Association on Water Pollution Research
L C DaviesSusete Martins-Dias
© 2022 Meta ULC. All rights reserved