Processing of fique bagasse waste into modified biochars for adsorption of caffeine and sodium diclofenac

Author(s):  
Yaned Milena Correa-Navarro ◽  
Juan Carlos Moreno-Piraján ◽  
Liliana Giraldo
2017 ◽  
Vol 68 (11) ◽  
pp. 2566-2569 ◽  
Author(s):  
Elena Rusu ◽  
Ionela Sarbu ◽  
Magdalena Mitache ◽  
Horatiu Moldovan ◽  
Carmen Ioana Biris ◽  
...  

The high frequency of occurrence of candidiasis as well as high mortality of patients with immunosuppression cause a tendency toward better understanding of Candida albicans species virulence factors and developing sensitive and specific diagnostic methods, and appropriate strategies of candidiasis treatment. In recent decades the incidence of fungal infections has alarming increases because of advanced medical treatments. In this study was analyzed possible ultrastructural changes of the species C. albicans cells following treatment with sodium diclofenac at various concentrations. Following treatment of C. albicans cells with sodium diclofenac 1 mM and 2 mM changes in the plasmalemma can be noticed, changes in the density of cell wall, disruption and necrotic appearance of the cytoplasm.


Author(s):  
Lorenzo Lisuzzo ◽  
Giuseppe Cavallaro ◽  
Stefana Milioto ◽  
Giuseppe Lazzara

AbstractIn this work, we investigated the effects of the vacuum pumping on both the loading efficiencies and the release kinetics of halloysite nanotubes filled with drug molecules dissolved in ethanol. As model drugs, salicylic acid and sodium diclofenac were selected. For comparison, the loading of the drug molecules was conducted on platy kaolinite to explore the key role of the hollow tubular morphology on the filling mechanism of halloysite. The effects of the pressure conditions used in the loading protocol were interpreted and discussed on the basis of the thermodynamic results provided by Knudsen thermogravimetry, which demonstrated the ethanol confinement inside the halloysite cavity. Several techniques (TEM, FTIR spectroscopy, DLS and $$\zeta$$ ζ -potential experiments) were employed to characterize the drug filled nanoclays. Besides, release kinetics of the drugs were studied and interpreted according to the loading mechanism. This work represents a further step for the development of nanotubular carriers with tunable release feature based on the loading protocol and drug localization into the carrier. Graphic abstract The filling efficiency of halloysite nanotubes is enhanced by the reduction of the pressure conditions used in the loading protocol.


2021 ◽  
Vol 1143 (1) ◽  
pp. 012073
Author(s):  
Wibawa Hendra Saputera ◽  
Candra Egiyawati ◽  
Amellia Setyani Putrie ◽  
Aryan Fathoni Amri ◽  
Jenny Rizkiana ◽  
...  

2021 ◽  
Vol 235 (3) ◽  
pp. 281-294
Author(s):  
Abida Kausar ◽  
Haq Nawaz Bhatti ◽  
Munawar Iqbal

Abstract Sugarcane bagasse waste biomass (SBWB) efficacy for the adsorption of Zr(IV) was investigated in batch and column modes. The process variables i.e. pH 1–4 (A), adsorbent dosage 0.0–0.3 g (B), and Zr(IV) ions initial concentration 25–200 mg/L (C) were studied. The experiments were run under central composite design (CCD) and data was analysed by response surface methodology (RSM) methodology. The factor A, B, C, AB interaction and square factor A2, C2 affected the Zr(IV) ions adsorption onto SBWB. The quadratic model fitted well to the adsorption data with high R2 values. The effect of bed height, flow rate and Zr(IV) ions initial concentration was also studied for column mode adsorption and efficiency was evaluated by breakthrough curves as well as Bed Depth Service and Thomas models. Bed height and Zr(IV) ions initial concentration enhanced the adsorption of capacity of Zr(IV) ions, whereas flow rate reduced the column efficiency.


Biochar ◽  
2021 ◽  
Author(s):  
Judilyn Q. Filipinas ◽  
Kim Katrina P. Rivera ◽  
Dennis C. Ong ◽  
Sheila Mae B. Pingul-Ong ◽  
Ralf Ruffel M. Abarca ◽  
...  

1988 ◽  
Vol 42 (1-3) ◽  
pp. 251-256 ◽  
Author(s):  
Toshiaki Nishihata ◽  
Masaru Keigami ◽  
Akira Kamada ◽  
Takashi Fujimoto ◽  
Shigeo Kamide ◽  
...  

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