B P International

Aims: This study investigates the use of sawdust from 3 hardwood species as low-cost adsorbent for the removal of copper from contaminated water.  Study Design: The experimental design used for this study was 3 x 2 x 4 factorial experiment; the different sawdust species, two baselines (treated and untreated) and four levels of pH and time as factors were combined and used for the study. Methodology: Test was carried out to investigate the effect of sawdust pre-treatment on their adsorption capacity in the removal of Copper ions from contaminated water at different pH levels; the sawdust samples were sieved through a screen size of 850 μm after which a portion of each species sawdust was subjected to pre-treatment by boiling while the other portions were maintained as control samples (untreated). Results: The results shows that adsorption capacity for both treated and untreated samples were 69.75±13.78%,  68.60±19.48%, 69.34±23.08%, 74.79±17.79%, 74.52±22.30% and 76.90±18.21% ...

The heat stress tolerance of hen egg white lysozyme (HEWL) was markedly enhanced by the adsorption of HEWL on bamboo charcoal powder (BCP), which is a kind of biochar. HEWL was firmly adsorbed on BCP even at high temperatures. The secondary structure of HEWL was altered to some extent by the adsorption of HEWL on BCP. The remaining activity of BCP-adsorbed HEWL exhibited more than 20% after the incubation for 30 min at 90°C although that of free one was hardly observed. Moreover, the half-life of BCP-adsorbed HEWL was 13 min at 90°C while that of free one was 4 min. Author(s) Details Hidetaka Noritomi Department of Applied Chemistry for Environment, Tokyo Metropolitan University, Tokyo, 192-0397, Japan. View Book: http://bp.bookpi.org/index.php/bpi/catalog/book/123

The adsorption immobilization of the serine protease α-chymotrypsin (α-CT) onto bamboo charcoal powder (BCP), which is a kind of biochar, improved the transesterification rate of N-acetyl-L-tyrosine ethyl ester (N-Ac-Tyr-OEt) with n-butanol (BuOH) in 9 organic solvents. Organic solvents strongly affected the catalysis of BCP-adsorbed α-CT. The transesterification rate of BCP-adsorbed α-CT was much superior to that of free α-CT in every organic solvent. Especially, the transesterification rate of BCP-adsorbed α-CT was about 760 times higher than that of free α-CT in n-butyl acetate. Author(s) Details Hidetaka Noritomi Department of Applied Chemistry for Environment, Tokyo Metropolitan University, Tokyo, 192-0397, Japan. View Book: http://bp.bookpi.org/index.php/bpi/catalog/book/123