Description  Claims  Cited references 

CA2090989   [0004] 
WO9637438A   [0004] 
HU187422A   [0005] 
CA1067627A   [0005] 
WO9950182A   [0006] 
US5322641A   [0009] 

Jnl. Water Poll Control Fed   [0003] 
Proceedings Water Quality Technology Conference   [0003] 
Surface Properties of Fe(OH)3 Absorbent Prepared on Aluminium Oxide   [0005] 
Metals pentavalent arsenic test water for testing   [0033]