Abstract
Simultaneous usage of cationic and anionic thermosensitive hydrogels was shown to positively contribute to adsorption of heavy metal ions. The potential capacity for recovering heavy metal ions from an aqueous solution was enhanced by incorporating relatively hydrophobic moiety to the hydrogels, which was ascribed to the increase in the desorption on elevating the temperature over the lower critical swelling temperature (LCST). N-tert-butylacrilamide was added into the hydrogels to increase its desorption potential. The addition of N-tert-butylacrylamide does not significantly affect hydrogels’ adsorption ability. Moreover, the adsorption-desorption cycle was not diminished by repeating the temperature swing above the critical temperature at which the volume phase transition was induced.
Highlights
Rapid industrial development is one of the causes of increasing metal concentrations in the environment
Most of the issues come from the untreated used mining sites. Those cavities will hold water that will mix with all heavy metals that are left in the sites (Greenpeace South East AsiaIndonesia, 2010)
Lead poisoning can lead to a various range of health impact range from sub-clinical effects to lethal pathologic alteration (Plaza and Lambetucci, 2019)
Summary
Rapid industrial development is one of the causes of increasing metal concentrations in the environment. The study revealed that in Binuang area, South Kalimantan Province, coal mining produced waste dumps and AMD in many settlement ponds with a considerably low pH (2.8 to 4.4), with metals among others magnesium, manganese, iron, cadmium, hexavalent chromium and lead (Simarmata et al, 2011). These heavy metals pose a serious threat to human health. Those cavities will hold water that will mix with all heavy metals that are left in the sites (Greenpeace South East AsiaIndonesia, 2010). Since mining activities at this site are ongoing, the study concluded that the mine would continue to produce AMD in years to come, life-threatening problems that need to be taken seriously
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