scholarly journals Pengaruh Karbon Aktif Komposit Hibrida pada Absorpsi Air Permukaan

2019 ◽  
Vol 12 (1) ◽  
pp. 47
Author(s):  
Daniel Lihoudo Williams ◽  
I.D.G Ary Subagia ◽  
AAIA Sri Komaladewi
Keyword(s):  
Activated Carbon ◽  
Press Mold ◽  
Hot Press ◽  
E Coli ◽  
Turbidity Test

Penelitian ini bertujuan mengetahui unjuk kerja komposit hibrida dalam proses adsorpsi air permukaan. Komposit hibrida merupakan bahan yang terdiri dari morninga olifera (MO) dan activated carbon (AC) sebagai fillers, dan tepung lengket sebagai polimer yang diproduksi menggunakan cetakan penekanan panas (hot-press mold) pada temperatur 200°C. Komposisi filler dan polimer didasarkan pada rasio fraksi berat yaitu 40% filler dan 60% polimer. Kualitas absorpsi komposit hibrida dilakukan melalui proses perendaman dan turbidity test. Hasil pengujian perendaman benda kerja selama dua minggu adalah waktu paling optimal dari kenaikan massa komposit hibrida yang direndam pada air permukaan untuk masing-masing variasi hibrida. Peningkatan jumlah prosentase AC pada benda uji meningkatkan kekeruhan air karena adanya pelepasan unsur C pada air sesuai dengan test turbiditasnya. Kemudian, kandungan coliform dan E-coli pada air permukaan menurun disebabkan oleh meningkatnya prosentase MO pada benda uji. Dari hasil tersebut, disimpulkan bahwa hibridisasi filler MO dan AC memberikan dampak positif terhadap kualitas air permukaan.

scholarly journals Green Synthesized Silver Nanoparticles Immobilized on Activated Carbon Nanoparticles: Antibacterial Activity Enhancement Study and Its Application on Textiles Fabrics

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3790
Author(s):  
Pratama Jujur Wibawa ◽  
Muhammad Nur ◽  
Mukhammad Asy’ari ◽  
Wijanarka Wijanarka ◽  
Heru Susanto ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Activated Carbon ◽  
Aloe Vera ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
E Coli ◽  
Transmission Electron ◽  
Average Size ◽  
Green Synthesized Silver Nanoparticles

This research aimed to enhance the antibacterial activity of silver nanoparticles (AgNPs) synthesized from silver nitrate (AgNO3) using aloe vera extract. It was performed by means of incorporating AgNPs on an activated carbon nanoparticle (ACNPs) under ultrasonic agitation (40 kHz, 2 × 50 watt) for 30 min in an aqueous colloidal medium. The successful AgNPs synthesis was clarified with both Ultraviolet-Visible (UV-Vis) and Fourier Transform Infrared (FTIR) spectrophotometers. The successful AgNPs–ACNPs incorporation and its particle size analysis was performed using Transmission Electron Microscope (TEM). The brown color suspension generation and UV-Vis’s spectra maximum wavelength at around 480 nm confirmed the existence of AgNPs. The particle sizes of the produced AgNPs were about 5 to 10 nm in the majority number, which collectively surrounded the aloe vera extract secondary metabolites formed core-shell like nanostructure of 8.20 ± 2.05 nm in average size, while ACNPs themselves were about 20.10 ± 1.52 nm in average size formed particles cluster, and 48.00 ± 8.37 nm in average size as stacking of other particles. The antibacterial activity of the synthesized AgNPs and AgNPs-immobilized ACNPs was 57.58% and 63.64%, respectively (for E. coli); 61.25%, and 93.49%, respectively (for S. aureus). In addition, when the AgNPs-immobilized ACNPs material was coated on the cotton and polyester fabrics, the antibacterial activity of the materials changed, becoming 19.23% (cotton; E. coli), 31.73% (polyester; E. coli), 13.36% (cotton; S. aureus), 21.15% (polyester; S. aureus).

Temperature Dependent On Activated Carbon For Their Biological Activity And Photocatalytical Degradation of Methylene Blue: A Novel Approach To Green Synthesis

2021 ◽  
Author(s):  
Amalanathan.M ◽  
Aravind.M ◽  
Sony Michael Mary.M ◽  
Razan A. Alshgari ◽  
Asma A. Alothman ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Antibacterial Activity ◽  
Activated Carbon ◽  
Hydrothermal Carbonization ◽  
Microbial Pathogens ◽  
X Ray Diffraction ◽  
E Coli ◽  
Novel Approach ◽  
Transmission Electron ◽  
Ft Ir

Abstract In this work, jasmine flower derived activated carbon were successfully synthesized by hydrothermal carbonization process at the different annealing temperature. The Crystallinity, phase, structural, morphological and optical properties of activated carbon were investigated using X-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Transmission electron microscope (TEM), and UV-visible spectroscopy analysis. The graphitic phase of carbon was obtained from the XRD pattern. Surface morphology reveals irregular-shaped nanoparticles. The photodegradation of methylene blue (MB) was carried out under the visible light irradiation technique to study its photocatalytic activity. The activated carbon obtained at 400oC, 500oC and 600oC shows a photocatalytic degradation efficiency of 86%, 90%, and 94%, respectively. Antibacterial activity of activated carbon was examined against S. Aureus (MTCC-737) and E-Coli (MTCC- 443) microbial pathogens, and their potent antibacterial activity was examined from the zone of inhibition layer.

scholarly journals Removal of Methylene blue, Escherichia coli and Pseudomonus aeruginosa by Adsorption Process of Activated Carbon Produced from Moringa oleifera Bark

2021 ◽  
Author(s):  
Md. Shahin Azad ◽  
Syaza Azhari ◽  
Mohd Sukri Hassan
Keyword(s):  
Escherichia Coli ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Moringa Oleifera ◽  
Adsorption Process ◽  
Diffusion Mechanism ◽  
Bacterial Load ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
E Coli

The utilization of biopolymer derived from Moringa oleifera bark using ZnCl2 and H2SO4 as activating agents for eliminating Methylene blue, Escherichia coli and Pseudomonas aeruginosa from producing wastewater. In this study, Methylene blue and both bacteria were effectively adsorbed by activated carbon with lowest dosage. The activated carbon was prepared from natural-by product of Moringa oleifera bark by pyrolysis in a furnace at 700°C for 1 h. The characteristics of activated carbon have been determined using Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET), pHzpc (zero point charge), and FTIR spectroscopy. The obtained result were closely fitted with Freundlich isotherm model and adsorption kinetics follow the pseudo-second order model with the highest value of correlation coefficient (R2~1). Adsorption quantity was dose dependent and bacteria were maximum adsorbed using 10 mg of activated carbon as well as 25mg for methylene blue. The maximum adsorption capacity showed within 1 hour. The bacterial load was reduced by 98% for E. coli, 96% for P. aeruginosa as well as methylene blue reduced 94.2% from aqueous solution using batch adsorption methods. Adsorption process controlled by film diffusion mechanism. These result proposed that the activated carbon of Moringa oleifera can be used as a good adsorbent for the removal of Methylene blue, E. coli and P. aeruginosa.

Synergistic antibacterial activity of a combination of silver and copper nanoparticle impregnated activated carbon for water disinfection

2017 ◽  
Vol 4 (12) ◽  
pp. 2405-2417 ◽  
Author(s):  
Pritam Biswas ◽  
Rajdip Bandyopadhyaya
Keyword(s):  
Cell Death ◽  
Antibacterial Activity ◽  
Activated Carbon ◽  
Bacterial Activity ◽  
Water Disinfection ◽  
Copper Nanoparticle ◽  
Schematic Representation ◽  
E Coli ◽  
Synergistic Antibacterial Activity

Schematic representation of E. coli cell death using the synergistic anti-bacterial activity of a mixture of Ag-AC and Cu-AC hybrids.

Zinc-sulphate-heptahydrate coated activated carbon for microbe removal from stormwater

2012 ◽  
Vol 66 (7) ◽  
pp. 1582-1589 ◽  
Author(s):  
R. M. Guest ◽  
C. Schang ◽  
A. Deletic ◽  
D. T. McCarthy
Keyword(s):  
Escherichia Coli ◽  
Activated Carbon ◽  
Zinc Sulphate ◽  
Granular Activated Carbon ◽  
Coating Process ◽  
Urban Stormwater ◽  
Sampling Methodology ◽  
E Coli ◽  
Effective Removal ◽  
Filtration Material

There is a need to develop effective stormwater filters for passive (without any addition of chemicals or energy) and effective removal of pathogens in order to mainstream stormwater harvesting. This study focuses on the development of coated granular activated carbon (GAC) filtration material in order to develop filters for effective removal of pathogens from urban stormwater. Several laboratory trials were performed to gauge the effectiveness of the filters, which use a mixture of the zinc-sulphate-heptahydrate coated GAC and sand, on the removal of Escherichia coli (E. coli) from semi-natural stormwater. On average, a 98% removal of the inflow concentration of E. coli was achieved. Furthermore, there was also an improvement of approximately 25% in the removal of phosphorous. However, it was found that the treated material was leaching zinc. It was important to determine whether the observed removal of E. coli was indirectly caused by the sampling methodology. The results showed that the inactivation of the E. coli in the collected sample was small compared with the inactivation which actually occurred within the filter. This provides much promise to the filter, but the presence of zinc in the outflow demonstrates the need for further investigation into the stabilisation of the coating process.

scholarly journals Electrosorptive disinfection of Escherichia coli (E. coli) aqueous solutions by activated carbon monolith electrodes

2020 ◽  
Author(s):  
Edip Bayram ◽  
Ceren Karaman ◽  
Zehra Kuru ◽  
Onur Karaman
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Activity ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Industrial Process ◽  
E Coli ◽  
Carbon Monolith ◽  
As Adsorption ◽  
Activated Carbon Monolith ◽  
Better Than

Abstract Electrosorption, which can be defined as adsorption onto the surfaces of charged electrodes, has been developing as an efficient and environmentally friendly technology for removing toxic pollutants from aqueous solutions. In this study, an industrial process was used for the fabrication of activated carbon electrodes (ACEs). An electroless metal deposition method was used for the modification of activated carbon granules with silver (Ag) for antibacterial activity of electrodes. The antibacterial activity of Ag-modified–ACEs (Ag–ACEs) for Escherichia coli (E. coli) bacteria commonly found in water was tested. Adsorption and electrosorption behaviors of E. coli aqueous solutions onto ACEs and Ag–ACEs were examined in a cyclic electrosorption system. It has been concluded that the performance of Ag–ACEs is better than ACEs as an electrode for electrosorption of E. coli. Moreover polarization can significantly enhance the removal efficiency of E. coli on both ACEs and Ag–ACEs. Finally, electrosorption capacity of the system for E. coli was determined.

Biosorption of hexavalent chromium using biofilm of E. coli supported on granulated activated carbon

2009 ◽  
Vol 25 (10) ◽  
pp. 1695-1703 ◽  
Author(s):  
Rabei M. Gabr ◽  
Sanaa M. F. Gad-Elrab ◽  
Romany N. N. Abskharon ◽  
Sedky H. A. Hassan ◽  
Ahmed A. M. Shoreit
Keyword(s):  
Activated Carbon ◽  
Hexavalent Chromium ◽  
E Coli ◽  
Granulated Activated Carbon

Investigation of surfactant-modified activated carbon for recycled water disinfection

2010 ◽  
Vol 62 (8) ◽  
pp. 1755-1766 ◽  
Author(s):  
T. Garoma ◽  
J. Kocher
Keyword(s):  
Activated Carbon ◽  
Contact Time ◽  
Total Coliform ◽  
Water Disinfection ◽  
Hexadecyltrimethylammonium Bromide ◽  
Recycled Water ◽  
Experimental Conditions ◽  
Modified Activated Carbon ◽  
E Coli ◽  
Didodecyldimethylammonium Bromide

This study investigated the effectiveness of surfactant-loaded granular activated carbon (GAC) to deactivate total coliform, E. coli, and enterococci found in tertiary effluent under various experimental conditions, i.e. varying surfactant dose, GAC dose, and contact time. The results indicate that GAC loaded with 100 mg/g of hexadecyltrimethylammonium bromide (CTAB) and didodecyldimethylammonium bromide (DDAB), achieved log reductions as high as 1.02 and 1.86 of total coliform, respectively. At varying GAC doses and contact times, 200 mg/g of DDAB dose achieved 99.9 to 100% reduction in total coliform at initial concentrations as high as 38,000 MPN/100 mL. Complete deactivation of E. coli and enterococci were observed for CTAB and DDAB at 200 mg/g dose for varying GAC doses and contact times used in this study. DDAB was more effective than CTAB at deactivating total coliform and E. coli, both Gram-negative bacteria, while both surfactants were shown to have similar disinfection capabilities against enterococci. Surfactant dose and GAC dose were shown to enhance bacteria deactivation; however, surfactant dose was found to be the most important parameter. For contact times evaluated in this research, bacterial deactivation remained the same or slightly decreased with contact time. In conclusion, surfactant-modified GAC can be used as an effective disinfection technique for recycled water.

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