Search

Your search keyword '"Pratiwi, Reno"' showing total 36 results
Start Over Author "Pratiwi, Reno"
36 results on '"Pratiwi, Reno"'

2. The role of electrolytes in improving electrocoagulation performance of ciprofloxacin pollutants removal and hydrogen production.

Author

Pratiwi, Reno and Slamet

Subjects
*RENEWABLE energy sources, *LIQUID waste, *HOSPITAL admission & discharge, *HYDROGEN as fuel, *HYDROGEN production
Abstract

During the present pandemic, liquid waste discharged from hospitals is an issue that should be resolved urgently. As one of the most prevalent antibiotics in wastewater, ciprofloxacin was treated using electrocoagulation. This process that uses electrochemical principles can remove dissolved components and is capable of producing hydrogen as an alternative energy source. In this study, the performance of the electrocoagulation process was improved by using NaCl asthe electrolyte. Concentrations of 0.2 gr/l and 0.5 gr/l were used to represent the effect of the presence of NaCl in the process. The waste solution's acidity level expressed by pH was also observed for its effect on process performance. The result shows that using 0.2 g/l NaCl provides a significant hydrogen gas production capability. The condition for ciprofloxacin removal, which was not significantly affected by the presence of NaCl, was due to the different characteristicsof the coagulant formed at each electrolyte concentration. At pH 5 and NaCl concentration of 0.2 g/l, the process performance was outstanding in removing ciprofloxacin compared to pH 10. The much lower amount of coagulant at pH 5 did not indicate that the removal ability was not superior to pH 10, which resulted in a significantly greater amount. Thiscondition confirms the effect of the characteristics of the coagulant formed in each process on the electrocoagulation performance. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

22. Performance of CdS/TNTAs Nanocomposite in Removing Ciprofloxacin and Hydrogen Production Using Simultaneously Electrocoagulation-Photocatalysis Process.

Author

Lestari Sugihartini, Rahayu, Pratiwi, Reno, and Slamet, S.

Subjects
*CIPROFLOXACIN, *PROCESS capability, *NANOCOMPOSITE materials, *LIQUID waste, *ENERGY bands, *ION recombination
Abstract

This study used CdS as a pair of TiO2 Nanotube Arrays (TNTAs), considering the position and width of the energy band gap, which is expected to increase photocatalyst performance. The nancomposite was synthesized using the successive ionic layer adsorption reaction (SILAR) method, with Cd(CH3COO)2 and Na2S as precursors. The CdS/TNTAs nanocomposite is expected to reduce the energy band gap to enable the visible and UV spectrum to activate the photocatalyst. Additionally, the formed heterojunction mechanism provides opportunities for the trajectories of electrons and holes to be farther apart and reduce the recombination rate. The degradation ability of CdS/TNTAs nanocomposite in the photocatalytic process was evaluated using samples of ciprofloxacin liquid waste as an antibiotic, which is quite challenging to decompose completely. The ability of the photocatalytic process to produce hydrogen gas was also observed and its performance synergized with the electrocoagulation process. The result showed that the use of CdS as a TNTAs partner in CdS/TNTAs nanocomposites affects increasing photocatalyst performance, both in degrading ciprofloxacin and producing hydrogen gas. Furthermore, the CdS/TNTAs nanocomposite increased the photocatalytic process's ability to degrade ciprofloxacin and produce hydrogen from 8.5 to 20.5% and 6 to 23.5 mol/m2 compared to using TNTAs alone. The processing capability is further enhanced when run in synergy with the electrocoagulation process where the removal of ciprofloxacin reaches 86.55% and the hydrogen produced is 2.62×106 mol/m2. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results