Publications by authors named "Erni Johan"
Waterborne pathogens threaten 2.2 billion people lacking access to safely managed drinking water services, causing over a million annual diarrheal deaths. Individuals without access to chlorine reagents or filtration devices often resort to do-it-yourself (DIY) methods, such as boiling or solar disinfection (SODIS).
View Article and Find Full Text PDFAlthough many kinds of materials for water purification are known, easy-to-use methods that ensure the safety of drinking water for rural populations are not sufficiently available. Sorbent-embedded sheets provide methods for the easy removal of contaminants from drinking water in the home. As an example of such a sorbent-embedded sheet, we prepared a Linde type A (LTA) zeolite-embedded sheet (ZES) and examined its Pb(II) removal behaviour.
View Article and Find Full Text PDFArticle Synopsis
- Zeolites, besides being catalysts, are effective for adsorbing and removing various cations, primarily due to their negative charge from the substitution of Si with Al.
- In a study, the adsorption levels of Na+ on different types of zeolites decreased significantly at low pH-pNa values, despite each zeolite having a constant negative charge.
- The results showed that zeolites with a lower Si/Al ratio have a higher selectivity for H+ adsorption, which can reduce their ability to adsorb other cations and might even lead to their dissolution in water.