Laboratory experiments and modeling studies were performed to investigate the redox transformations of arsenic and iron in water treatment sludge during aging, and to evaluate the impact of those transformations on the leachability of arsenic determined with the U.S. EPA toxicity characteristic leaching procedure (TCLP). When the backwash suspension samples collected from a California surface w...

A multi-phase lipid particle, a novel iron carrier, was prepared using mixture of wax (derived from rice bran) and coconut oil. high shear homogenization method employed for particle processing. The main body the consisted waxy matrix containing nanostructured oil phases. When these particles were dispersed in an aqueous solution with lipase, phases digested free fatty acids released. Water dro...

The goal of primary tooth pulp therapy is the preservation of the primary teeth until their normal time of exfoliation. Teeth with carious involvement approaching the pulp can be treated with a variety of approaches, including three pulpotomy techniques--diluted formocresol, ferric sulfate, and mineral trioxide aggregate--and an indirect pulp therapy technique. Accurate diagnosis of the vitalit...

Covering hydrophobic regions with stabilization agents to solubilize purified transmembrane proteins is crucial for their application in aqueous media. The small molecule 2-methyl-2,4-pentanediol (MPD) was used to stabilize the transmembrane protein Ferric hydroxamate uptake protein component A (FhuA) utilized as host for the construction of a rhodium-based biohybrid catalyst. Unlike commonly u...

Microsomes and reconstituted systems containing cytochrome P450 can oxidize glycerol to formaldehyde in a reaction catalyzed by an oxidant produced from the interaction of nonheme iron with H2O2. To evaluate the mechanism for this oxidation, the generation of glycerol radicals by various systems was compared to rates of formaldehyde production from glycerol. Photolysis of H2O2, oxidation of xan...

A new kind of flocculants, named Polymer Silicate Phosphate Ferric Sulfate(PSPFS), was synthesized by ferrous sulfate used as the main material and activated silicic acid as additive. In this paper, High-Viscosity Oil Refining wastewater from Liaohe Petrochemical Corporation was the treatment object. Overall, the influencing factors and synthesis technology conditions of PSPFS were determined b...

A novel approach for recovering yttrium from high ferric and strong acidic sulphate leach solutions of deep-sea mud by stepwise extraction stripping has been developed. The results show that the first step N235+TBP system can extract H2SO4 well adjust raffinates to a desirable pH, while only iron was selectively co-extracted with negligible loss ions. organic solution be easily regenerated usin...