A weak-base fibrous anion exchanger effective for rapid phosphate removal from water

SD/MnFe2O4 composite, a biosorbent for As(III) and As(V) removal from wastewater: Optimization and isotherm study

“…Furthermore, it is assessed that Coulombic interaction between phosphate and positive sites is more than that in case of As(V), resulting in stronger interaction of phosphate with positive site than As(V). So, phosphate might overcome As(V) in competition for overall binding with positive sites [134]. The results in Fig.…”

“…Both phosphate and arsenic are located in the same main group, and the molecular structure of the phosphate ion is very similar to that of the arsenic ion. So, among all the anions, phosphate caused the highest reduction in arsenic biosorption, because the existing phosphate ions must strongly contend with arsenic ions for biosorptive sites on the surfaces of SD/MnFe 2 O 4 composite [127,131,134]. Though both divalent As(V) and phosphate anions are capable to form hydrogen bonding with MeOH 2 + and Me-NH 3+ , the basicity of divalent As(V) is very similar to that of divalent phosphate since both parent acids have very close values of pK a1 , pK a2 , and pK a3 .…”

The Temporal Transcriptomic Response of Pinus massoniana Seedlings to Phosphorus Deficiency

“…Pi-deficiency (both P1 and P2) also increased the expression patterns of a number of ABC transporters, which have been shown to be induced under various abiotic stress conditions [62]–[64]. An anion exchanger presumably involved in Pi removal and absorption is one such protein [65], [66]. Our results also indicated an increased transport of sugars (comp14752_c0_seq1, comp324303_c0_seq1), amino acids (comp31360_c0_seq5, comp20063_c0_seq1), and organic acids (comp16177_c0_seq1), any of which could be involved in Pi mobilization and acquisition.…”

Phosphate recovery from treated municipal wastewater using hybrid anion exchangers containing hydrated ferric oxide nanoparticles

“…Polymeric ion exchangers became a very suitable alternative as they combine high mechanical and hydraulic properties with the selectivity of hydrated metal oxides (HMO) toward oxyanions as phosphate . Among the variety of hydrated metal oxides, hydrated ferric oxide (HFO) is characterized to be innocuous, inexpensive, readily available, chemically stable over a wide pH range and provides sizes of freshly precipitated amorphous HFO particles between 10 and 100 nm …”