Effect of pH on the aluminum salts hydrolysis during coagulation process: Formation and decomposition of polymeric aluminum species

Aluminum speciation of coagulants with low concentration: Analysis by electrospray ionization mass spectrometry

“…Thus, pH can significantly accelerated aluminum hydrolysis. Our previous study also indicated that effect of pH on aluminum speciation was very important in aluminum hydrolysis [16], especially for traditional coagulant during coagulation [30,31].…”

Simultaneous removal of arsenic and fluoride by freshly-prepared aluminum hydroxide

“…AlOxHy dissolution also occurs at low pH, i.e., excessive H + . Soluble Al includes bimomer, oligimer, and Al polymer besides monomer Al as Al 3+ , owing to the hydrolysis and polymerization reactions at pH above 4 [24]. Soluble Al may directly act with either of arsenic and fluoride.…”

Influence of coagulation mechanisms on the residual aluminum – The roles of coagulant species and MW of organic matter

“…One part of these large complexes was so large that it would precipitate and be filtered, while other parts would remain in the residual Al as a large dissolved form. In Addition, the exits of OM can depolymerize the coagulants [39]; consequently, the low molecular Al was also the main form in the residual Al for the polymeric coagulants.…”