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A novel sorbent Ulva lactuca ‐derived biochar for remediation of Remazol Brilliant Orange 3R in packed column
Author(s) -
Gokulan R.,
Ganesh Prabhu G.,
Jegan J.
Publication year - 2019
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.1002/wer.1092
Subject(s) - biochar , sorption , ulva lactuca , lactuca , desorption , chemistry , environmental remediation , sorbent , orange (colour) , chromatography , environmental chemistry , nuclear chemistry , botany , pyrolysis , adsorption , contamination , food science , biology , organic chemistry , ecology
An up‐flow fixed column study was conducted to remediate Remazol Brilliant Orange 3R ( RBO 3R) from contaminated solutions using biochar derived from Ulva lactuca biomass. The influences of column parameters on dye sorption were studied in detail, which include initial RBO 3R concentration, bed depth, and flow rate. Optimization experiments indicated that maximum RBO 3R column uptake of 0.114 mmol/g was observed at 0.25 mmol/L (initial RBO 3R concentration), 0.3 L/hr (flow rate), and 25 cm ( U. lactuca bed depth). Modeling of column sorption data was performed using the Yoon–Nelson, modified dose–response and Thomas models. The spent biochar was desorbed and rejuvenated using 0.01 M Na OH . The elutant (0.01 M Na OH ) exhibited 99.7% efficiency, and the process was completed in 115 min with high overall concentration factor of 8.4. Practitioner points This study explores the impact of column parameters on the dye removal potential of U. lactuca ‐derived biochar. At optimized condition, the biochar bed exhibited highest Remazol Brilliant Orange 3R uptake capacity of 0.114 mmol/g. The regeneration and desorption of U. lactuca ‐derived biochar bed was possible with NaOH (0.01 M) as elutant.