Dear Sir. Concerning your issue for the chemical environment of PAC and phosphate. I think the following attached files may help you in your analysis.

Thanks

Dear Dr Elgilani,

Thank you so much for your kind reply. I have read the articles but I didnot get my query. I need to know specifically reaction mechanism of PACI with phosphorus in sewage sludge i.e. type of bonding ionic (adsorption), covalent bonding, inner or outer sphere complexation. If you get any article please send me.

Thank you so much for your all anticipations.