Buletinul Institutului Politehnic din Iași Secția Chimie și Inginerie Chimică ISSN: 2537-2947
ISSN-L: 0254-7104
2024, Volume 70(74), Issue 4 (December), pp. 42 - 62
Textile Dye Biosorption onto Non-Living Freshwater Green Biomass:
Influencing Factors and Its Efficiency. A Case Study (I)
CRINUȚA LARISA ORTOVAN, “Gheorghe Asachi” Technical
University of Iaşi, “Cristofor Simionescu” Faculty of Chemical Engineering
and Environmental Protection, Iaşi, Romania CARMEN ZAHARIA, “Gheorghe
Asachi” Technical University of Iaşi, “Cristofor Simionescu” Faculty of
Chemical Engineering and Environmental Protection, Iaşi, Romania,
carmen.zaharia@academic.tuiasi.ro
Abstract This study discusses the experimental results (i.e.
discoloration efficiency and Remazol Rosso RB dye removal) performed in
application of a biosorption step for treatment of a simulated textile
colored wastewater (WW) using dried non-living freshwater green algae-based
materials (Spirogyra algae, size < 2 mm) as biosorbent in free form (S1) and
after heating at 100°C for 6h (S2). Different influencing factors, i.e. pH,
biosorbent dosage, dye concentration, temperature, biosorption time, were
studied for finding the best operating conditions for highest discoloration
and dye removal degrees. The results indicate that the dried green
algal-based material is efficient as biosorbent (i.e. removals of dye and
color in range of 64-91% by S1 biosorbent, and 54-85% by S2 biosorbent; mean
biosorption capacity of 3.325 - 5.435 mg/g) and may be used in the textile
WW treatment for decreasing the organic load and discoloration, especially
in the case of frequent WW flowrate and chemical composition variation, when
is working in the adequate operating conditions. Keywords: biosorption
efficiency, dried non-living green Spirogyra algae, influencing factors,
process variables, Remazol Rosso RB dye, simulated textile wastewater