About: http://webisa.webdatacommons.org/423211244

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	They must first be coagulated by a chemical such as the aluminum or iron compounds mentioned above and then absorbed by the hydrous metal oxide floc generated by these compounds.
http://www.w3.org/ns/prov#wasQuotedFrom	dissolved-air-flotation.com