Sawdust

About: Sawdust is a research topic. Over the lifetime, 5526 publications have been published within this topic receiving 86499 citations. The topic is also known as: wood dust & hard wood dust.

Relationship between Initial Moisture Content and the Liquid Yield from Pyrolysis of Sawdust

Abstract: The pyrolysis of sawdust from beech wood results in the production of charcoal, liquid and gaseous products. The yields of liquid products increase with increasing pyrolysis temperature from 575 to 700 K, then decrease with increasing the temperature. The yield of oil increases with increasing the initial moisture content of the sample. The results indicated that the presence of moisture influenced significantly the thermal degradation rate of sawdust pyrolysis. The peak temperatures in pyrolysis were about 691 and 702 K for heating rates of 5 K/min. The liquid yield from pyrolysis of the sawdust with 54.8% moisture was about 33% higher than that in nitrogen stream.

Investigation of biochar from Cedrella fissilis applied to the adsorption of atrazine herbicide from an aqueous medium

Abstract: Biochar was produced from the sawdust of the wood forest species Cedrella fissilis and later used as an adsorbent to remove atrazine herbicide from aqueous media. Biochar showed high thermal stability, an amorphous structure, and a highly irregular surface, mainly composed of carbon-containing bonds. The isothermal curves confirmed that the increase in temperature favored the adsorption of the herbicide. The Langmuir model best suited the experimental equilibrium data, with the maximum adsorption capacity of 7.68 mg g-1 at 328 K. The thermodynamic parameters confirmed a spontaneous process of an endothermic nature governed by physical interactions (interactions of van der Waals and hydrogen bonds). Kinetic studies showed that equilibrium was reached within 180 min. The linear driving force model (LDF) showed good statistical adjustment to the experimental data, where it was observed that the diffusion coefficient increased with the concentration of adsorbate. Biochar can be reused in up to three cycles. Finally, the adsorbent showed good efficiency in real water samples from rivers contaminated with atrazine, with 76.58% and 71.29% removal.

Application of polypyrrole coated onto wood sawdust for the removal of carmoisine dye from aqueous solutions

Abstract: In this research, the removal of carmoisine dye from aqueous solutions using polypyrrole coated onto sawdust (PPy/SD) has been investigated. The sorption experiments were performed using both batch and column systems. The effects of some important parameters such as pH, initial concentration, sorbent dosage, exposure time, and temperature on uptake of carmoisine dye were investigated. Based on the data obtained in batch system, it was found that maximum adsorption is occurred under acidic conditions. Complete removal was observed when a dye solution with the initial concentration of 100 mg L−1 was treated by 1.0 g of the used adsorbent (PPy/SD) at pH value of 4 and room temperature. However, higher sorption was observed at elevated temperature. According to the kinetics study, it was found that the experimental data fitted very well the pseudo-second-order kinetic model (k2 = 0.184 g mg−1 min−1). It was found that polypyrrole chemically coated on SD is an efficient system for the removal of carmoisine dye from aqueous solutions. Desorption of the dye-loaded column was also possible by using dilute NaOH solution with high efficiency (∼ 80%). © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

Removal of Zn2+ from Electroplating Wastewater Using Modified Wood Sawdust and Sugarcane Bagasse

Abstract: This paper describes the preparation of new adsorbents derived from sugarcane bagasse and wood sawdust Manilkara sp. to remove zinc II ions from electroplating wastewater. The first part deals with the chemical modification of sugarcane bagasse and wood sawdust, using succinic anhydride to introduce carboxylic acid functions into the material. The obtained materials modified sugarcane bagasse MB2 and modified wood sawdust MS2 were then characterized by infrared spectroscopy IR and used in adsorption experi- ments. The adsorption experiments evaluates Zn 2+ removal from aqueous single metal solution and real electroplating wastewater on both batch and continuous experiments using fixed-bed columns prepared in laboratorial scale with the obtained adsorbents. Adsorption isotherms were then developed using Langmuir model and the Thomas kinetic model. The calculated Zn 2+ adsorption capacities were found to be 145 mg/g for MS2 and 125 mg/g for MB2 in single metal aqueous solution, whereas for the industrial wastewater these values were 61 mg/g for MS2 and 55 mg/g for MB2.