Complete dechlorination of pentachlorophenol using palladized bacterial cellulose in a rotating catalyst contact reactor

Patel, Upendra D.; Suresh, S.

doi:10.1016/j.jcis.2007.12.019

Cited by 48 publications

(22 citation statements)

References 27 publications

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“…However, because of its poor dissolution properties and processing difficulties, BC's application as water adsorbent for water conservation is still limited [9,[11][12][13][14][15][16][17]. Usually, BC modification could be done with some physical or chemical methods to enhance its performance [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Bacterial Cellulose/Inorganic Gel of Bentonite Composite by In Situ Modification

Wang

Huang

et al. 2015

Indian J Microbiol

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To evaluate the possibility of Bacterial cellulose/Inorganic Gel of Bentonite (BC/IGB) composite production using in situ method, the BC/IGB composite was successfully produced by in situ modification of BC in both HS medium and corncob hydrolysate. The results showed that the BC/IGB composite obtained in HS medium (one classical medium for BC production) had a higher water holding capacity, but the water retention capacity of the BC/IGB composite obtained in corncob hydrolysate was better. The performance of BC/IGB composite depended on the environment of in situ modification. Using different media showed significant influence on the sugar utilization and BC yield. In addition, BC/IGB composite produced by in situ method was compared with that produced by ex situ method, and the results shows that water holding capacity of BC/IGB composite obtained through in situ method was better. XRD results showed the crystallinity of BC/IGB composite related little to its performance as water absorbent. Overall, in situ modification is appropriate for further production of BC composite and other clay materials.

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Section: Introductionmentioning

confidence: 99%

Preparation of Bacterial Cellulose/Inorganic Gel of Bentonite Composite by In Situ Modification

Wang

Huang

et al. 2015

Indian J Microbiol

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“…The dried film was subsequently ignited in a muffle furnace at 650uC for 24 hours, to completely oxidize the organic content and determine the total quantity of palladium that was deposited. A significant difference between the initial and final palladium content in the bacterial cellulose before and after performing the reactions was not expected based on inductively coupled plasma analysis performed earlier by Patel and Suresh (2008).…”

Section: Methodsmentioning

confidence: 71%

“…(1) Immobilization of bacterial cellulose on a suitable support material and in situ palladization, (2) Provision to provide a high surface area of palladized bacterial cellulose for reductive reactions, and (3) Requirement for the exposure of immobilized palladium alternately to a liquid phase containing the target pollutant (dye) and a gaseous phase containing molecular hydrogen (Patel and Suresh, 2008).…”

Section: Methodsmentioning

confidence: 99%

Decolorization of Drimarene Red Dye Using Palladized Bacterial Cellulose in a Reactor

Vyjayanthi

Suresh

2010

Water Environment Research

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Palladized bacterial cellulose was used in the present investigations for the reductive decolorization of drimarene red dye in a rotating catalyst contact reactor (RCCR). Approximately 90% of 100 mg/L of dye was decolorized at pH 2 after 25 minutes of reaction in RCCR using hydrogen as the reducing agent. Scanning electron microscopy and energy dispersive X-ray spectroscopic analyses suggested irreversible impregnation of nano-sized zero-valent-form palladium (Pd 0 ) deposits within the bacterial cellulose fibrils. The kinetics of decolorization remained unaffected by varying initial concentrations of dye and rotational speed of discs in the reactor. The rate of decolorization of dye increased with increasing palladium concentration per unit area of bacterial cellulose and decreasing pH of the reaction phase. UV-Visible absorption spectroscopy and liquid chromatography-mass spectroscopy suggested the accumulation of low-molecular-weight products, as a result of the cleavage of azo bonds in the dye molecules. Reusability of immobilized palladium is expected to reduce the treatment cost. Water Environ. Res., 82, 601 (2010).

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“…1a, b, respectively. The characteristic ATR-FTIR bands of pure BC are stretching vibration of hydroxyl group (-OH) (from 3600 to 3050 cm -1 ), stretching vibration of C-OH (1060 cm -1 ), bending vibration of C-O-C (1163 cm -1 ) (Patel and Suresh 2008). The comparison between the ATR-FTIR band of pure BC and BC/ TiO 2 shows that the characteristic ATR-FTIR bands of pure BC declined because of a steric hindrance effect Cellulose of TiO 2 particles coating on the surface of BC fibers (Qian et al 2007).…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic disinfection of water by bacterial cellulose/N–F co-doped TiO2 under fluorescent light

2015

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The hybrid nanocomposite material of bacterial cellulose (BC) nanofibers and titaniumdioxide (TiO 2 ) nanoparticles with improved visible light sensitivity was developed by doping nitrogen (N) and fluorine (F) on TiO 2 nanoparticles embedded on BC nanofibers. To synthesize TiO 2 nanoparticles on BC produced by Acetobacter xylinum (TISTR 975), titanium tetraisopropoxide (TTIP) was used as a titanium source and was directly hydrolyzed on BC nanofibers. After providing heat via the reflux technique to BC/TiO 2 pellicle, the crystalline structure of TiO 2 was changed to an anatase form on a three dimensional network structure of BC confirmed by XRD. Nitrogen (N) and fluorine (F) were successfully doped into TiO 2 nanoparticles by using NH 4 F as the source of N and F (BC/N-F-co-doped TiO 2 ). The TEM results showed that the average particle size of BC/N-F-codoped TiO 2 was smaller than the BC matrix containing none of the co-doped TiO 2 (BC/TiO 2 ) and N-doped TiO 2 (BC/N-TiO 2 ). In addition, BC/ N-F-co-doped TiO 2 demonstrated the high efficiency of photocatalytic disinfection activity against both gram-negative and gram-positive bacteria under fluorescence light. Nevertheless, the photocatalytic antibacterial activity of N-F-co-doped TiO 2 also depended on the type of bacteria, and degree of N-F-co-doped TiO 2 .

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Complete dechlorination of pentachlorophenol using palladized bacterial cellulose in a rotating catalyst contact reactor

Cited by 48 publications

References 27 publications

Preparation of Bacterial Cellulose/Inorganic Gel of Bentonite Composite by In Situ Modification

Preparation of Bacterial Cellulose/Inorganic Gel of Bentonite Composite by In Situ Modification

Decolorization of Drimarene Red Dye Using Palladized Bacterial Cellulose in a Reactor

Photocatalytic disinfection of water by bacterial cellulose/N–F co-doped TiO2 under fluorescent light

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