Phosphates are well-known groundwater and surface water contaminants, with even modest increases in their concentration contributing to the eutrophication of lakes and coastal waterways and thus potentially harming the environment....
Bioplastics such as cellulose nanofibers (CNF) are widely used in daily life as an alternative to plastics. CNF is also considered a biodegradable, readily disposable, and low-cost material, making it suitable as a sensor platform. The mechanically treated CNF has both hydrophobic and hydrophilic properties where the hydrophobic sides bond strongly with MWCNTs to provide conductivity on the CNF sheet, while the hydrophilic sides allow the target component to be adsorbed on its laminated structure and react with the electrode surface. From an electrochemical measurement of ferricyanide solution indicated that the MWCNTs modified CNF could act well as electrode. Furthermore, the thin-sheet electrode successfully detected ethanol based on a direct electron transfer (DET) between PQQ-ADH and the MWCNTs on the electrode surface. Aside from its lightweight properties, the developed CNF electrode possesses excellent stretchability, flexibility, and adjustability to human skin, making it ideal for a future wearable skin gas sensor.
Abstract.This research studied the inhibition of corrosion by bawang dayak leaves extract (EleutherineamericanaMerr.) on API 5L steel in brine water environment (3.5% NaCl). The inhibitor was extracted using maceration process from bawang dayak leaves that was cultivated in Paser District, East Kalimantan. The test of antioxidant activity showed that bawang dayak leaves extract is a very powerful antioxidant with IC 50 value of 27.30204. The results from FTIR test show the presence of electronegative atoms and double bonds of the alkenes groups that provide the potential of the extract as a corrosion inhibitor. Efficiency of inhibition reached up to 93.158% for the addition of inhibitor with 300 ppm concentration and 20 days of immersion time. This inhibitory behavior is also supported by polarization measurements where the lowest corrosion rate of 0.00128 mm/year is obtained at the same concentration and immersion time.
Simple electrochemical detection of the antibiotic amoxicillin (AMX) in water is crucial to mitigate health and environmental risks; however, the process requires single-use electrodes, which can increase the waste generated...
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