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Peruvian diatomites are materials with potential use in the decontamination of heavy metals from industrial effluents even with their low SiO2 content thanks to their minor oxides and specific surface area values.Different parameters must be taken into account at the same time to understand the efficiency of metal removal in polluted waters.Theaffinityofdiatomiteforthemetalsstudiedfollowed the trend Zn > Pb > Cu with significantly high removal percentages such as 79.0 and 98.35 for Zn, 53.4 and 94.47 for Pb, and 35.4 and 90.3 for Cu. No one-to-one relationships were found between the removal efficiency of the studied metals with physical, chemical, and mineralogical properties such as cation exchange capacity, specific surface area, SiO2 content, or content of amorphous material.This allows impurities in diatomite to play afundamentalroleintheirabilitytoremovemetalssuch as Cu, Pb, and Zn in contaminated effluents.For exam- ple,the presenceofAl and Fedecreasethe efficiencyof the diatomite to remove these heavy metals.
Peruvian diatomites are materials with potential use in the decontamination of heavy metals from industrial effluents even with their low SiO2 content thanks to their minor oxides and specific surface area values. Theaffinityofdiatomiteforthemetalsstudiedfollowed the trend Zn > Pb > Cu with significantly high removal percentages such as 79.0 and 98.35 for Zn, 53.4 and 94.47 for Pb, and 35.4 and 90.3 for Cu. No one-to-one relationships were found between the removal efficiency of the studied metals with physical, chemical, and mineralogical properties such as cation exchange capacity, specific surface area, SiO2 content, or content of amorphous material.
Different parameters must be taken into account at the same time to understand the efficiency of metal removal in polluted waters. In the case studied, the specific surface area and minority oxides seem to be the characteristics that have the greatest effect on the removal efficiency of all metals, adjusting better for the case of zinc. This allows impurities in diatomite to play afundamentalroleintheirabilitytoremovemetalssuch as Cu, Pb, and Zn in contaminated effluents. For exam- ple,the presenceofAl and Fedecreasethe efficiencyof the diatomite to remove these heavy metals.
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