Valorization of biomass waste to engineered activated biochar by microwave pyrolysis: Progress, challenges, and future directions

Recent advances in applications of activated carbon from biowaste for wastewater treatment: a short review.

Prospects of banana waste utilization in wastewater treatment: A review

Abstract Electrode fouling is a phenomenon that can severely affect the analytical characteristics of a technique or a sensor, such as sensitivity, detection limit, reproducibility, and overall reliability. Electrode fouling generally involves the passivation of an electrode surface by a fouling agent that forms an increasingly impermeable layer on the electrode, inhibiting the direct contact of an analyte of interest with the electrode surface for electron transfer. Some potential fouling agents include proteins, phenols, amino acids, neurotransmitters, and other biological molecules. Various antifouling strategies have been reported to reduce or eliminate electrode fouling. Most antifouling strategies exploit a protective layer or barrier on an electrode substrate to prevent the fouling agent from reaching the electrode surface. Although such strategies can be quite effective, they are inappropriate for systems in which the analyte itself is also the fouling agent. In such cases, other strategies must be used, including electrode surface modification and electrochemical activation. In this review, recent strategies to minimise and efforts to overcome electrode fouling across a diverse range of analytes and fouling agents will be presented.

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Recent strategies to minimise fouling in electrochemical detection systems

High surface area and mesoporous activated carbon from KOH-activated dragon fruit peels for methylene blue dye adsorption: Optimization and mechanism study

Response surface methodology approach for optimization of Cu2+, Ni2+ and Pb2+ adsorption using KOH-activated carbon from banana peel

Nanoporous gold (NPG) thin films were found to be capable of directly and reliably sensing phenol and catechol using amperometric technique at neutral conditions without enzyme. The sensing of phenol and catechol was conducted on NPG based on their different electro-oxidation potentials. The NPG thin films exhibited not only good sensitivities but also large linear detection ranges in comparison with the current state of the art enzyme-based electrodes. They also had a good resistance against surface fouling, enabling detection at neutral conditions. A good selectivity over various organic and inorganic interfering agents was also recorded. In particular, although NPG appeared to be a good sensor for both phenol and catechol, it was found that the NPG was able to selectively determine catechol in the presence of phenol at an appropriate applied voltage. The achieved results offer potentially promising and simple non-enzymatic amperometric detection of phenolic compounds in industrial and environmental analyses using NPG thin film based electrodes.

Non-enzymatic amperometric detection of phenol and catechol using nanoporous gold

https://www.rsc.org/suppdata/c5/cc/c5cc02832a/c5cc02832a1.pdf

Tailoring metal–oxide interfaces of inverse catalysts of TiO2/nanoporous-Au under hydrogen oxidation

This research focused on the development of adsorbents based on cheap, abundant and locally available agricultural wastes in Viet Nam to remove dyes from aqueous solution. In details, the effects of initial concentration (100-600 ppm), initial dose of adsorbent (0.1-1.5 g) and contacting time on the adsorption behaviors of Rhodamine B onto different kinds of pretreated fruit peel wastes, including orange peels, pomelo peels, passion-fruit peels, were evaluated. It was found that these bio-peels efficiently adsorbed in a short time, within one hour. The dye removal efficiency of orange peels and passion fruit peels ranged from 82-92% while that of pomelo peels was faster with 91-94% depending on the initial concentration (200 ppm). The efficiency of dye removal increases significantly as adsorbent dosage increases, passion-fruit peels 43-98%, pomelo peels 67-94%, orange peels 57-93%. Equilibrium adsorption results obeyed well the Freundlich isotherm; according the adsorption capacity was determined in the order: passion-fruit peels > orange peels > pomelo peels.

https://iopscience.iop.org/article/10.1088/1755-1315/159/1/012015/pdf

Pretreated Fruit Peels as Adsorbents for Removal of Dyes from Water

Nanoporous gold thin films were prepared by electrochemical dealloying of Si out of AuxSi1−x co-deposited on Si substrate. The x values were easily controlled in the range of 0.1–0.9 by the distances between the sample position and the target positions at a constant plasma power. Structure of pores and gold ligaments could be controlled via adjusting the alloy compositions. The gold nanoporous films were applied for amperometric sensing of phenylamine (aniline) and hydroxylamine. It was found that the sensitivity of the nanoporous gold films was correlated with their porosity. Furthermore, nanoporous gold films with roughness factor of around 25 provided high sensitivity, good repeatability, relatively low detection limit and good resistance toward electrode fouling as compared to other electrodes in the literature. These achievements offer a simple method for nanoporous gold films which exhibit stable performance in environmental monitoring.

Bui Thi Phuong Quynh

Papers

Response surface methodology approach for optimization of Cu2+, Ni2+ and Pb2+ adsorption using KOH-activated carbon from banana peel

Non-enzymatic amperometric detection of phenol and catechol using nanoporous gold

Tailoring metal–oxide interfaces of inverse catalysts of TiO2/nanoporous-Au under hydrogen oxidation

Pretreated Fruit Peels as Adsorbents for Removal of Dyes from Water

Nanoporous gold for amperometric detection of amino-containing compounds