???? ?? ??? ??? ??? ??????? ????? ????? paratungstate ??????? (APT) ?? ???? ????? ????? ??????? ?? ????, ???? ????????, ect ????, ??? ???? ???? ??????? ????? ??????, ??? ?? ??, ????? ????????? ?? ??????? ???? ????? 99%. ??? ????? ??? ?????? ????? ??? ????? ?????? ??? ?????:
1. ????? ??????? ??? ?????? ???? ????? ??? ????? ????? ?????? ???????, ????? ??? ????? ?? ???? pH ?? ????? ? 2.5 ~ 4 ?? ??? ????? desorption;
2. ????? ??????? ??????? ??? ??????? ??? ?????? ??? ????? ?????, ????? ??? deaorb W ?? ??? ??????, ??? ??? ???? paratungstate ??????? ??? ??????? ?????, ?????? APT ???? ?????.

?????? ?? ????? ???? ?????? ????? desorption ??? ??? ???? ??????? ????? ?? ????? ?????? ?? paratungstate ??????? ?? ??? ?- pH ?? 6 ~ 8, ???? ????? ?????? ????, ?????? ?? desorption ?????? ?? ???? ?????.

????? ????? ??? ?????? ????? ??? ??? ??????????? ?? ??? ????? ??????????? ??????. ???? ?????? ????? ???? ????? ???????? ?? ?????, ?????, ??? ????? ?? ????? ????? ??????? ??? ??????? ?? ???? ?????? ??? ????????? ?? ???????? "???". ?????? ??? ?????? ?? ????? ??? ??????? (?????????? ?????? ?? ?????? ?'?) , zeolites, montmorillonite, ????, ????? ????. ?????? ??? ?? ?????? ????? ???????? ????? ?????? ????? (???????) ?? ?????? ??????? ???????? ????? ?????? ????? (???????). ?? ?? ?????? ???????? ???????? ?????? ??????? ???????? ?? ?????. ?? ???, ????? ?? ????? ?? ??????? ???????? ???? ???? ??????? ??? ???? ?????? ??????? ??????? ?????? ?? ??? ????? ???? ?????, ?? ?????? ?? ?????? ?????? ??????? ???? ?????? ????? ????? ?????.