http://vital.seals.ac.za:8080/vital/access/manager/Index ${session.getAttribute("locale")} 5 http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:10419 Ni > Cu > Fe > Mg. The mass of metal ions that accumulated on one gram of clinoptilolite as determined from the isotherms was calculated to be 6.16 mg/g for lead and 0.74 mg/g for copper. Data from the lead equilibrium studies were fitted into Langmuir and Freundlich equations and linear regression was used to calculate linearity coefficients for the isotherms. The results showed that the removal of lead ions by clinoptilolite is complex as both monolayer and multilayer adsorption occurs on a heterogeneous surface.]]> Wed 12 May 2021 19:56:33 SAST ]]> http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:4462 Wed 12 May 2021 18:46:59 SAST ]]> http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:5215 Thu 13 May 2021 01:34:54 SAST ]]>