Phosphate speciation on Al-substituted goethite: ATR-FTIR/2D-COS and CD-MUSIC modeling

Natural goethite commonly encounters Al substitution for Fe, which alters the surface reactivity of goethite.

A computational study on interaction of aluminum withd-glucose 6-phosphate for various stoichiometries

The interaction of aluminum with glucose 6-phosphate is thought to disrupt key processes of the glucide metabolism in cells. Complex and rich aluminum chelation chemistry is found in Aluminum-glucose 6-phosphate speciation study.

Metal and phosphate speciation during anaerobic digestion of phosphorus rich sludge

Chemical extraction methods are used to investigate metal and phosphate speciation during anaerobic digestion of phosphorus-rich sludge. Tests were performed using model compounds to evaluate the efficacy of the reagents in the extraction sequences and these results compared with similar work by other researchers. The metal speciation method was found to be suitable for identifying shifts in metal distribution but was unrepresentative of actual metal species. The phosphate speciation method did give adequate separation of the phosphate compounds tested. Full-scale digesters treating chemical and biological phosphate removal (CPR and BPR) sludge were analysed according to the methods developed. Results show that digestion of CPR sludge did not increase the soluble P concentration in the digester and that most of the precipitated phosphorus appeared to be retained in the sludge as inorganic P. The digester treating BPR sludge showed increased soluble and water-extractable P, in comparison to the control digester. Trace metal speciation profiles were found to be affected by addition of CPR sludge.