naa a22 4500 510749089 CHVBK 20180411083057.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s11270-012-1379-y doi (NATIONALLICENCE)springer-10.1007/s11270-012-1379-y The Impact of Process Sequences on Pollutant Removal Efficiencies in Tannery Wastewater Treatment [Elektronische Daten] [George Ayoub, Abeer Hamzeh, Mahmoud Al-Hindi] A laboratory-scale study was conducted to determine the removal efficiencies of nine contaminants from a tannery wastewater using a number of physicochemical processes. Coagulation-flocculation using bittern as coagulant, oxidation-utilizing ozone, and adsorption using activated carbon were applied separately and in different sequences. Jar tests were utilized to conduct the experimental work. Except for arsenic, the highest removal efficiencies were recorded when coagulation/flocculation was conducted on the alkalized samples using a bittern dose of 5mL/L. Activated carbon adsorption improved removal efficiencies of several contaminants. The coagulation/flocculation-adsorption sequence using the optimum dose of 5mL/L of bittern resulted in high removal efficiencies for total suspended solids (TSS) (97% ± 1), apparent color (100% ± 0), turbidity (97% ± 1), total nitrogen (86% ± 1), and chromium (100% ± 0). On the other hand, the same sequence resulted in moderate removal efficiencies for chemical oxygen demand (COD) (72% ± 7) and total phosphorus (74% ± 5) and relatively low removals for biochemical oxygen demand (BOD) (55% ± 10) and arsenic (42% ± 14). The removal efficiencies for the different tested sequences demonstrated that each sequence did improve the removal efficiencies for most of the parameters tested and consequently, the quality of tannery effluent. However, no single optimum sequence was capable of attaining high removal efficiencies for all nine parameters. Springer Science+Business Media Dordrecht, 2012 Adsorption nationallicence Bittern nationallicence Coagulation-flocculation nationallicence Oxidation nationallicence Tannery wastewater nationallicence Ayoub George Civil and Environmental Engineering Department, AUB, Riad El Solh, P. O. Box 11-0236, 1107-2020, Beirut, Lebanon aut Hamzeh Abeer Civil and Environmental Engineering Department, AUB, Riad El Solh, P. O. Box 11-0236, 1107-2020, Beirut, Lebanon aut Al-Hindi Mahmoud Chemical Engineering Program, AUB, Beirut, Lebanon aut Water, Air, & Soil Pollution Springer Netherlands 224/1(2013-01-01), 1-13 0049-6979 224:1<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1379-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1379-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ayoub George Civil and Environmental Engineering Department, AUB, Riad El Solh, P. O. Box 11-0236, 1107-2020, Beirut, Lebanon aut NATIONALLICENCE 700 1- Hamzeh Abeer Civil and Environmental Engineering Department, AUB, Riad El Solh, P. O. Box 11-0236, 1107-2020, Beirut, Lebanon aut NATIONALLICENCE 700 1- Al-Hindi Mahmoud Chemical Engineering Program, AUB, Beirut, Lebanon aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/1(2013-01-01), 1-13 0049-6979 224:1<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer