Articles

Addressing the Environmental Concerns: Statistical Approach for Mg2+ and Mn2+ Mitigation in Water System Sustainability in Indonesia

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This research aimed to determine the most effective adsorbent for reducing Mg2+ and Mn2+ levels in residential water near the oil and gas industry in the Tambun area, Bekasi, Indonesia. Bentonite was tested with varying temperature conditions. The study further compared activated charcoal and bentonite as potential adsorbents, examining their efficacy under different contact times (10, 20, and 30 minutes). Thus, sampling followed the SNI 6989.57:2008 method for surface water sampling, with bentonite conditioning and activation as initial steps. Next, the adsorption experiments utilized a separating funnel, varying the contact time between adsorbent and sample. Hence, the filtrates were analyzed quantitatively for Mn2+ using atomic absorption spectroscopy and for Mg2+ through complexometric titration.

PFAS Degradation Techniques – A Road towards Alleviating Organic Pollution

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PFAS are commonly found pollutants in soil and water bodies. Of all the PFAS that are found, PFOA and PFOS are the most hazardous ones. The review focuses upon Adsorption, Sonochemical Degradation, Photocatalysts, and Bio-remediation as techniques for the removal and degradation of PFA.

The Effect of Variations Concentration of Chloramphenicol on the Imprinting Factor of Molecularly Imprinted Polymer

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This research aimed is to determine the effect of chloramphenicol concentration on the imprinting factor (IF) value of the Molecular Imprinted Polymer (MIP). Imprinting Factor is a standard of the interaction power between printed polymer and template molecule. The IF value was calculated based on the adsorption capacity value between MIP and blank polymer (BP). MIP was synthesized from non-imprinted polymer (NIP) using the precipitation method with chloramphenicol as a template, methacrylic acid (MAA) as a monomer, and ethylene glycol dimethacrylate (EGDMA) as a crosslinker. The results showed that the optimum concentration was at 10 ppm with the IF value of 5,005. The isothermal adsorption result of Chloramphenicol using MIP can best be described by the Langmuir model. The limit of detection (LOD) value was 0.098 and the limit of quantification (LOQ) value was 0.327.

Application of Activated Afzelia Africana and Acacia Albida Carbon for Removal of Pollutants in Textile Wastewater

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Adsorption of contaminants in textile wastewater onto activated carbon derived from two wood species has been studied using batch-adsorption techniques. This study was carried out to examine the removal efficiency of the low-cost adsorbent (Afzelia africana) AFA and (Acacia albida) ACA for the removal of heavy metals and other organic contaminants from textile effluents. The influence of contact time and adsorbent dose kept constant on the adsorption process was also studied. Removal efficiency increased with increase in contact time. The two adsorbents had an average removal efficiency of 60% at 90mins contact time for Zn. The ACA had higher removal efficiency for chromium at all contact times than AFA except at 120mins contact time where there existed a slight difference in the removal efficiency between the two adsorbents. Removal efficiency of iron was high between 58.18- 70.52% and 72.75-75.86% for AFA and ACA carbon respectively. This showed that iron had high affinity to the adsorbents surface. It was observed that AFA exhibited highest removal efficiency for nitrate at all contact times as compared to ACA. Results indicated that the freely abundant, locally available, low-cost adsorbent derived from the two wood species could be treated as being economically viable for the removal of contaminants from textile effluents.