Chitosan, a bio-based polymer which has similar characteristics to those of cellulose, exhibits cationic behavior in acidic solutions and strong affinity for metals ions. Thus, it has received increased attention for the preparation of heterogeneous catalysts. Recent studies demonstrated that chitosan-based catalysts had high sorption capacities, chelating activities, stability and versatility,...

Serratia marcescens has been studied to show a higher degradation potential for organo-phosphorus pesticides. This property made it useful as bioremediation agent. The bacterial cell was bio-stimulated in luria beterni broth at selected experimental temperature ranging from 25 ºC – 40 ºC. highest biomass recorded 35 range 7.56 -8.10mg/ml single strength and double yeast extract beterni, respect...

Aquifer microbial communities can be investigated using Bio-traps(®) ("bio-traps"), passive samplers containing Bio-Sep(®) beads ("bio-beads") that are deployed in monitoring wells to be colonized by bacteria delivered via groundwater flow through the well. When bio-beads are "baited" with organic contaminants enriched in (13)C, stable isotope probing allows assessment of the composition and ac...

Nitroaromatic compounds (NACs) are commonly found as soil contaminants in military training sites and manufacturing facilities, and may adversely affect human and ecosystem health. Exchangeable cation effects on p-nitrocyanobenzene (p-NCB) and 1,4-dinitrobenzene (1,4-DNB) sorption by the Webster (fine loamy, mixed, mesic Typic Haplaquoll) soil series A (WA) andB (WB) horizons were determined fr...

The development of energy efficient, reduced-weight, regenerable adsorption systems for removal of environmental contaminants, such as CO2 in spacecraft cabin air, chemical/biological warfare agents (CWA), and toxic industrial chemicals (TICs) is an area of continuing interest to NASA and Department of Defense, respectively. Precision Combustion, Inc. (PCI) has designed and developed a sorption...

The objectives of the present work give results view some physicochemical, chemical and biological-chemical methods for heavy metals removal from Acid Mine Drainage (AMD). background studied physicochemical was adsorption by turf, precipitation neutralization with NaOH. principles were bioprecipitation applications sulphate-reducing bacteria (SRB), sorption bacterially produced iron sulphides b...