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.

Effects of ball milling on structural changes and hydrolysis of lignocellulosic biomass in liquid hot-water compressed carbon dioxide

Abstract: Mechanical activation is an effective method for destroying the crystalline structure. Biomass, especially its hemicellulose, can be degraded in the green solvent of liquid hot-water compressed carbon dioxide. To improve the degradation of crystalline cellulose in liquid hot-water compressed carbon dioxide, pretreatment of camphorwood sawdust by mechanical activation with a stirring ball mill was studied. Ball milling parameters and their effects on structure were determined by SEM, XRD and FT-IR. The influence of milling parameters on cellulose conversion can be ranked as follows: ball milling speed>activation time>the mass ratio of ball to biomass. The optimum milling condition was obtained at ball milling speed of 450 rpm and mass ratio of 30: 1 of ball to biomass for 2 h. In this condition, cellulose crystallinity of sawdust decreased from 60.93% to 21.40%. The cellulose conversion was 37.8%, which was nearly four times of raw material (10.2%). The glucose yield in the hydrolysate was 1.49 g·L−1, which was nearly three times of that of raw material. It showed mechanical activation can destroy the crystalline structure of cellulose to promote degradation and the damage of lignocellulosic internal structure caused by ball milling is irreversible.

Removal of Lead Ion from Aqueous Solutions Using Sawdust Coated by Polyaniline

Abstract: Polyaniline was synthesized chemically, coated on sawdust via cast method in the form of emeraldine base (EB) from formic acid as solvent, and used as an adsorbent for removal of lead ion or from aqueous solution. The effects of some important chemical and physical factors in removal efficiency have also been investigated. Among the different parameters, the effect of pH was the most prominent. It was found that metal uptake is occurred under neutral or slightly alkaline conditions, while under relatively strong acidic media, the sorption of the investigated metal ions was negligible and desorption is a predominant process. It was found that undoped PANi (EB form) coated on polar substrates such as sawdust (SD) can be used as an effective adsorbent for removal of heavy metal ions in water and wastewater treatments. All the previous investigations and applications take advantage of the electrical conductivity (metallic), electrochemical (redox activity) and electrochromic properties of the polyaniline. While; in this research, we have taken advantage of the chelating properties of PANi for metal sorption.

Solvolysis, Electrochemistry, and Development of Synthetic Building Blocks from Sawdust

Abstract: Either aldehyde or cinnamyl ether products can be selectively extracted from raw sawdust by controlling the temperature and pressure of a solvolysis reaction. These materials have been used as platform chemicals for the synthesis of 15 different synthetic substrates. The conversion of the initial sawdust-derived materials into electron-rich aryl substrates often requires the use of oxidation and reduction chemistry, and the role electrochemistry can play as a sustainable method for these transformations has been defined.

Effective removal of Methylene Blue dye from water using three different low-cost adsorbents.

Abstract: Water pollution has become an environmental problem worldwide as well as local. Dyes represent the raw material in textile, leather, paper and plastic industries and a pollutant or toxic waste in the untreated effluents discharged out from these industries. The adsorption process is one of the most efficient methods for the removal of dye from waste water. The present laboratory model study was carried out to check the effect of three different low-cost adsorbents (such as banana fibre, coconut fibre and sawdust) and their adsorption capacity of Methylene Blue dye from water. While checking with different initial dye concentration for all the adsorbents, the maximum adsorption was observed in 250 mg l−1, and the same concentration followed for further optimization. For optimization, one parameter at a time method was followed at different pH (3.0, 5.0, 7.0, 9.0, and 11), temperature (25, 30, 35, 40, and 45°C), adsorbent dosage (1, 3, 5, 7, and 10%) and contact time (30, 60, 90, 120, 150, 180, and ...