TY - JOUR
T1 - Removal of triazine herbicides from aqueous systems by a biofilm reactor continuously or intermittently operated
AU - Sánchez-Sánchez, R.
AU - Ahuatzi-Chacón, D.
AU - Galíndez-Mayer, J.
AU - Ruiz-Ordaz, N.
AU - Salmerón-Alcocer, A.
N1 - Funding Information:
This work was supported by a grant obtained from SIP, IPN . The authors wish to thank COFAA-IPN for fellowships to D. A-C, N. R-O, A. S-A and J. G-M, and to SIP-IPN for the financial support of R. S-S.
PY - 2013
Y1 - 2013
N2 - The impact of pesticide movement via overland flow or tile drainage water on the quality of receiving water bodies has been a serious concern in the last decades; thus, for remediation of water contaminated with herbicides, bioreaction systems designed to retain biomass have been proposed. In this context, the aim of this study was to evaluate the atrazine and terbutryn biodegradation capacity of a microbial consortium, immobilized in a biofilm reactor (PBR), packed with fragments of porous volcanic stone. The microbial consortium, constituted by four predominant bacterial strains, was used to degrade a commercial formulation of atrazine and terbutryn in the biofilm reactor, intermittently or continuously operated at volumetric loading rates ranging from 44 to 306mgL-1d-1. The complete removal of both herbicides was achieved in both systems; however, higher volumetric removal rates were obtained in the continuous system. It was demonstrated that the adjuvants of the commercial formulation of the herbicide significantly enhanced the removal of atrazine and terbutryn.
AB - The impact of pesticide movement via overland flow or tile drainage water on the quality of receiving water bodies has been a serious concern in the last decades; thus, for remediation of water contaminated with herbicides, bioreaction systems designed to retain biomass have been proposed. In this context, the aim of this study was to evaluate the atrazine and terbutryn biodegradation capacity of a microbial consortium, immobilized in a biofilm reactor (PBR), packed with fragments of porous volcanic stone. The microbial consortium, constituted by four predominant bacterial strains, was used to degrade a commercial formulation of atrazine and terbutryn in the biofilm reactor, intermittently or continuously operated at volumetric loading rates ranging from 44 to 306mgL-1d-1. The complete removal of both herbicides was achieved in both systems; however, higher volumetric removal rates were obtained in the continuous system. It was demonstrated that the adjuvants of the commercial formulation of the herbicide significantly enhanced the removal of atrazine and terbutryn.
KW - Arthrobacter
KW - Atrazine degradation
KW - Biofilm reactor
KW - Herbicide adjuvants
KW - Terbutryn degradation
KW - Tezontle
UR - http://www.scopus.com/inward/record.url?scp=84879424547&partnerID=8YFLogxK
U2 - 10.1016/j.jenvman.2013.05.050
DO - 10.1016/j.jenvman.2013.05.050
M3 - Artículo
SN - 0301-4797
VL - 128
SP - 421
EP - 426
JO - Journal of Environmental Management
JF - Journal of Environmental Management
ER -