Removal of Fe(III), Mn(II) and Zn(II) from palm oil mill effluent (POME) by natural zeolite

The behaviors and characteristics of a mesoporous activated carbon prepared from Tamarix hispida for Zn(II) adsorption from wastewater

“…The filtrate was analyzed for residual Zn(II) concentrations. The main parameters considered were pH (2, 3, 4, 6, 8, and 10), initial Zn(II) concentration (20,70, and 100 mg/L), adsorbent dose (1,2,4,6,8,10,15, and 20 g/L), solution temperature (10,20,30,40, and 50 C), mixing rate (0, 20, 50, 100, 150, 200, and 300 rpm), and contact time (2,5,10,15,20,30,40,50,60,70, and 80 min) in kinetic test. All tests were performed three times to ensure reproducibility of the results and the average number was reported as result.…”

“…By considering the economic aspect that applying a high mixing rate on a large scale would be very costly; the 150 rpm is suitable for the adsorption of Zn(II) from solution. Shavandi et al [30] indicated that the adsorption of Zn(II) onto a natural zeolite increases from 42 to 74% by increasing the mixing speed from 90 to 200 rpm.…”

Adsorption characteristics of construction waste for heavy metals from urban stormwater runoff

“…Covelo et al studied the heavy metal adsorption by humic umbrisols and showed that pseudo-first-order kinetic model fitted to Cu adsorption better [30]. Investigations for adsorption of heavy metals on saccharomyces cerevisiae [31], natural zeolite [32], blast furnace slag [33], and hazelnut shell [34] showed that the sorption kinetics could be better described by pseudo-second-order kinetics model. …”

Absorption Isotherm Study of Mn2+ on MnO2 and FeO - coated zeolite from aqueous solution

“…The correlation coefficient (R 2 =0.97) of Langmuir equation was high, using MOCZ as adsorbent, which suggested that the Langmuir isotherm model was suitable. The q max parameter is related to the sorption capacity with respect to a specific solute, and in the case of Mn, the values obtained in this study are closed to those of literature [19][20]. It can be seen in Table2 that the sorption capacity (q max ) of Mn for MOCZ is almost three and three times bigger than FOCZ.…”