About: http://webisa.webdatacommons.org/334860293

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Other heavy metals such as lead, nickel, cadmium, chromium, arsenic, and selenium can also be removed from water using iron by reduction and precipitation (U.S. Pat. Nos. 4,565,633; 4,405,464).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au