Abstract：
:The leather industry uses a large amount of chemicals to transform a raw hide into finished leather. Chemicals are not fully taken up by leather and thus end up in tannery wastewater. Physicochemical and toxicological characterization of tannery effluents has been widely assessed. However, the characterization of processing chemicals and their relation to the pollution load of effluents remains unknown. Thus, this study aimed to assess a physicochemical and cytotoxic characterization of chemicals used in the leather post-tanning process and to evaluate the contribution of each chemical to the pollution load of raw wastewater. This study was performed using a leather post-tanning formulation applied by a large tannery located in Brazil. Deacidulation agents caused high conductivity and dissolved solids in wastewater. Retanning agents (natural and synthetic tannins) were responsible for the largest inorganic pollution load, and synthetic tannins were more toxic than natural ones. Fatliquoring agents released the highest chemical oxygen demand load in wastewater and they were the chemical group that presented the highest toxicity. Fixing agent and black dye provided inorganic pollution load to wastewater, and nitrogen pollution of wastewater was mainly related to the neutralizing retanner and the black dye.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Hansen É,Monteiro de Aquim P,Hansen AW,Cardoso JK,Ziulkoski AL,Gutterres Mdoi
10.1016/j.jenvman.2020.110787subject
Has Abstractpub_date
2020-09-01 00:00:00pages
110787eissn
0301-4797issn
1095-8630pii
S0301-4797(20)30718-0journal_volume
269pub_type
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