STUDI ADSORPSI LOGAM Cu(II), Fe(II) DAN Ni(II) PADA LIMBAH CAIR DENGAN MENGGUNAKAN NANOPARTIKEL COBALT FERRITE (CoFe2O4) DAN SISTEM HIGH GRADIENT MAGNETIC SEPARATION (HGMS); STUDY ON ADSORPTION OF Cu(II), Fe(II) AND Ni(II) ON WASTE WATER USING COBALT FERRITE (CoFe2O4) NANOPARTICLES AND HIGH GRADIENT MAGNETIC SEPARATION (HGMS) SYSTEM

Asri, Ninig Sumawati, Edi Suharyadi

2015 | Disertasi | FMIPA

Nano adsorbent cobalt ferrite (CoFe2O4) have been synthesis using coprecipitation method and it used for removal of Cu(II), Fe(II) and Ni(II) ions from wastewater. The effect of particles size of adsorbent (10 nm, 9 nm, 8 nm, and 4 nm), magnetic properties (37.15 emu/g, 18.38 emu/g, 7.71 emu/g), addition of silica gel as coating agent, the use of high gradient magnetic separation (HGMS) system with perpendicular magnetic field of samples flow (66 gauss, 327 gauss, 663 gauss), also the comparative of effective adsorption CoFe2O4 with the other nano adsorbent (Fe3O4 and MgFe2O4) have been studied. The maximum adsorption of Cu(II) occurs at the smallest particle size (4 nm) is 99.4%, while adsorption of Ni(II) at all of particles size ranging at 99.8% to 99.9%. The adsorption of Ni(II) ions higher than Cu(II) at the various magnetic properties. Meanwhile, the removal metal ions decreased as addition of silica gel as coating agent. Cu(II) decreased from 99.3% to 97.8% and Ni(II) decreased from 99.9% to 99.7%. The adsorption of Fe(II) maximum at all of various parameters. The use of HGMS system prove the removal of Cu(II) decreased as increase magnetic field. The prediction caused by oxidation of HGMS matrix source is cuprum (Cu). The adsorption of Cu(II) and Ni(II) using CoFe2O4 more effective than Fe3O4 caused it have the surface area widely. For the same particles size, MgFe2O4 adsorps Cu(II) ions more while CoFe2O4 adsorps Ni(II) ions more. Furthermore, the result of this experiment revealed that CoFe2O4 nanoparticles can be used as the effective adsorbent to remove metal ions in the wastewater.

Kata Kunci : adsorbent; cobalt ferrite; adsorption; high gradient magnetic separation (HGMS)