TY - JOUR
T1 - Sustainable approach on removal of toxic metals from electroplating industrial wastewater using dissolved air flotation
AU - Pooja, G.
AU - Kumar, P. Senthil
AU - Prasannamedha, G.
AU - Varjani, Sunita
AU - Vo, Dai Viet N.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - This research paper concentrates on the removal of heavy metal from wastewater which was produced from an electroplating industry. Here, the Dissolved Air Flotation (DAF) treatment process is carried out to remove toxic metals such as chromium, cadmium, nickel, lead, and copper using Sodium Dodecyl Sulfate (SDS) as a collector. The best-optimized conditions for the maximum removal of all the metal ions about 97.39% was achieved at pH 8, contact time of 60 min, surfactant dosage of 0.2 g, and the pressure of 137.89 kPa. At optimized conditions, the treated water consists of 2.71 mg/L of chromium, 1.13 mg/L of cadmium, 10.24 mg/L of nickel, 0.06 mg/L of lead, and 1.14 mg/L of copper. The used surfactant SDS was found as an environmentally friendly compound as prescribed by the Environmental Protection Agency. It is inferred that the flotation kinetics that manifests the rate of recovery and time for all the metal ions follow first-order kinetics. Further, the removal rate constant (k) increases with decreasing the initial metal ion concentration. Overall, the result of this work propounds that the DAF process plays as a promising technique to eliminate noxious pollutants from the wastewater.© 2021 Elsevier Ltd. All rights reserved.
AB - This research paper concentrates on the removal of heavy metal from wastewater which was produced from an electroplating industry. Here, the Dissolved Air Flotation (DAF) treatment process is carried out to remove toxic metals such as chromium, cadmium, nickel, lead, and copper using Sodium Dodecyl Sulfate (SDS) as a collector. The best-optimized conditions for the maximum removal of all the metal ions about 97.39% was achieved at pH 8, contact time of 60 min, surfactant dosage of 0.2 g, and the pressure of 137.89 kPa. At optimized conditions, the treated water consists of 2.71 mg/L of chromium, 1.13 mg/L of cadmium, 10.24 mg/L of nickel, 0.06 mg/L of lead, and 1.14 mg/L of copper. The used surfactant SDS was found as an environmentally friendly compound as prescribed by the Environmental Protection Agency. It is inferred that the flotation kinetics that manifests the rate of recovery and time for all the metal ions follow first-order kinetics. Further, the removal rate constant (k) increases with decreasing the initial metal ion concentration. Overall, the result of this work propounds that the DAF process plays as a promising technique to eliminate noxious pollutants from the wastewater.© 2021 Elsevier Ltd. All rights reserved.
KW - Anionic surfactant
KW - Dissolved air flotation
KW - Electroplating wastewater
KW - Energy system
KW - Toxic metals
UR - http://www.scopus.com/inward/record.url?scp=85111143470&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85111143470&origin=recordpage
U2 - 10.1016/j.jenvman.2021.113147
DO - 10.1016/j.jenvman.2021.113147
M3 - RGC 21 - Publication in refereed journal
C2 - 34214795
SN - 0301-4797
VL - 295
JO - Journal of Environmental Management
JF - Journal of Environmental Management
M1 - 113147
ER -
