Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) HONDA Yoshiji and KITAMURA Mitsunobu and TAKATSUKI Hiroshi,ORP of Wastewater Containing Ni Ion Treated by Ferrite Process and XPS of the Sludge.,Journal of Japan Society on Water Environment,09168958,Japan Society on Water Environment,1999,22,1,35-39,https://cir.nii.ac.jp/crid/1390001205081212928,https://doi.org/10.2965/jswe.22.35