Title:
Brine Pretreated Sawdust as Adsorbent for Industrial Liquid Waste Cleaning
Author(s):
Politi, D.V., Sidiras, D.K.
Document(s):
Paper
Slide presentation
Abstract:
The aim of this study was to develop an efficient ecological pretreatment appropriate for spruce sawdust modification to produce a low cost activated carbon substitute. The pretreatment was hydrothermal treatment of spruce sawdust, with brine within the concept of zero waste circular economy. The pretreatment’s solid residue was investigated as an adsorbent for the pollutant removal from wastewater. According to the Freundlich isotherm adsorption model the adsorption capacity for brine pretreated spruce sawdust increased four times comparing to the untreated material. The maximum capacity was achieved for brine treatment combined severity factor logRo*=1.964. According to the Langmuir isotherm model the capacity for brine pretreated material increased 5.5 times comparing to the untreated one. On the other hand, according to the Lagergren adsorption kinetic model the capacity for brine pretreated material increased 140% comparing to the untreated one. Moreover, the second order kinetic model indicated 159% improvement of the adsorption capacity of the pretreated sawdust with optimal logRo*=-1.049. As a conclusion, the adsorption kinetic data are more useful for industrial scale applications because they deal with a less than 190 min adsorption process comparing to the adsorption isotherm data which are referring to a 14-day adsorption period.
Keywords:
biomass, sawdust, wastewater, pretreatment, adsorption
Topic:
Biomass Conversion to Bio-Based Products and Chemicals
Subtopic:
Processes for bio-based chemicals and materials
Event:
30th European Biomass Conference and Exhibition
Session:
6AO.3.4
Pages:
1005 - 1014
ISBN:
978-88-89407-22-6
Paper DOI:
10.5071/30thEUBCE2022-6AO.3.4
Price:
FREE
