About: http://webisa.webdatacommons.org/242673521

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	In fact, it might be possible to recover such other metals. If the water, or the protective layer, contains metals such as copper, manganese, zinc, the metals can be removed by such processes as adsorption onto the ferric hydroxide,
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com