Abstract:
:The goal of this study was to investigate the activity of the coagulant extracted from the cactus Opuntia ficus-indica (OFI) in the process of coagulation/flocculation of textile effluents. Preliminary tests of a kaolinite suspension achieved maximum turbidity removal of 95 % using an NaCl extraction solution. Optimization assays were conducted with actual effluents using the response surface methodology (RSM) based on the Box-Behnken experimental design. The responses of the variables FeCl3, dosage, cactus dosage, and pH in the removal of COD and turbidity from both effluents were investigated. The optimum conditions determined for jeans washing laundry effluent were the following: FeCl3 160 mg L(-1), cactus dosage 2.60 mg L(-1), and pH 5.0. For the fabric dyeing effluent, the optimum conditions were the following: FeCl3 640 mg L(-1), cactus dosage 160 mg L(-1), and pH 6.0. Investigation of the effects of the storage time and temperature of the cactus O. ficus-indica showed that coagulation efficiency was not significantly affected for storage at room temperature for up to 4 days.
journal_name
Environ Monit Assessjournal_title
Environmental monitoring and assessmentauthors
de Souza MT,Ambrosio E,de Almeida CA,de Souza Freitas TK,Santos LB,de Cinque Almeida V,Garcia JCdoi
10.1007/s10661-014-3775-9subject
Has Abstractpub_date
2014-08-01 00:00:00pages
5261-71issue
8eissn
0167-6369issn
1573-2959journal_volume
186pub_type
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