Removal of organic materials from TNT red water by Bamboo Charcoal adsorption

Fu, Dan; Zhang, Yihe; Lv, Fengzhu; Chu, Paul K.; Shang, Jiwu

doi:10.1016/j.cej.2012.03.039

Cited by 75 publications

(42 citation statements)

References 44 publications

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“…6 shows the effects of the exposure time on adsorption of organic pollutants from TNT red water diluted 30 times with a dosage of 2 g/25 mL between 298 and 353 K. The adsorption rate increases quickly in the initial 30 min and then does not change obviously, finally it reaches equilibrium after 30 min. A similar phenomenon has been reported for extraction of organic pollutants from TNT red water using AC and bamboo charcoal [22]. In this study, the relative removal of COD on MAC can reach 84.89% instead of 45% on AC at a dosage of 2 g/25 mL.…”

Section: Effects Of Adsorbent Dosage On Extraction Of Pollutantssupporting

confidence: 87%

Removal of organic pollutants from red water by magnetic-activated coke

Zhang

Tong

et al. 2015

Desalination and Water Treatment

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2014):Removal of organic pollutants from red water by magnetic-activated coke, Desalination and Water Treatment, A magnetic adsorbent, magnetic-activated coke (MAC), is incorporated with Fe 3 O 4 particles for removal of organic materials from 2,4,6-trinitrotoluene red water. The MAC is characterized by N 2 adsorption, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, and energy dispersive X-ray spectroscopy. Adsorption of organic pollutants is evaluated systematically by varying the adsorbent dosage, exposure time, temperature, pH, and dilution ratios of 2,4,6-trinitrotoluene red water. The equilibrium adsorption data can be better fitted with the Freundlich isotherm than Langmuir isotherm except at 343 K. The adsorption kinetics follows a pseudo-second-order model and thermodynamic analysis indicates an endothermic and spontaneous adsorption process. The settling rate after adsorption suggests that the response of MAC under an external magnetic field is very fast.

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Section: Effects Of Adsorbent Dosage On Extraction Of Pollutantssupporting

confidence: 87%

Removal of organic pollutants from red water by magnetic-activated coke

Zhang

Tong

et al. 2015

Desalination and Water Treatment

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“…millimole of sorbate per gram of adsorbent, against dye concentration at equilibrium (mM). In order to obtain a better description of the adsorption process, all the results were analyzed through the non-linear form of four two-parameters isotherm models (Langmuir, Freundlich, Dubinin-Radushkevich and Temkin) and two three-parameters models (Redlich-Peterson and Sips) [35,36]. Furthermore, the goodness-of-fit was evaluated by the root mean square error (RMSE) [37].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Development of a chitin/graphene oxide hybrid composite for the removal of pollutant dyes: Adsorption and desorption study

González

Villanueva

Piehl

et al. 2015

Chemical Engineering Journal

201

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“…Their results show that most chemical oxygen demand (COD) and DNTs in TNT red water could be removed by this technique (Zhang et al 2011); however, the fraction and saturated activated coke left were the hazardous wastes and needed to be further treated. Some researchers have investigated the TNT removal by activated carbon and further degradation (Fu et al 2012). Hwang et al (2005) conducted laboratory-scale experiments on the alkaline hydrolysis of TNT followed by thermal treatment of the hydrolysates.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption and wet air oxidation were also applied by researchers for TNT removal (Hao et al 1993; Lewis et al 2004;Fu et al 2012;Islam et al 2015). However, chemical methods are relatively more expensive and less environmental-acceptable compared to biological technologies and often require additional ex situ treatment systems, which may also produce new chemical by-products or waste gas emissions (Fuller et al 2005;Ayoub et al 2010;Douglas et al 2012;Islam et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of 2,4,6-trinitrotoluene-contaminated groundwater using unique bacterial strains: microcosm and mechanism studies

Sheu

Lien

Chen

et al. 2016

Int. J. Environ. Sci. Technol.

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Groundwater at many military factory, munition storage and maneuver sites is contaminated by explosives chemicals that were released into the subsurface. The 2,4,6-trinitrotoluene (TNT) is among the most common explosive pollutants. In this study, two TNT-degrading strains, isolated from TNT-contaminated soils and wastewater sludge, were applied for TNT biodegradation. Based on the 16S rDNA sequence analyses, these two bacterial strains were identified as Achromobacter sp. and Klebsiella sp. via biochemical and DNA analyses. Microcosm study was conducted to evaluate the feasibility and efficiency of TNT biodegradation under aerobic conditions. Results indicate that TNT degradation by-products were detected in microcosms (inoculated with Achromobacter sp. and Klebsiella sp.) with cane molasses addition. Klebsiella sp. and Achromobacter sp. used TNT as the nitrogen source and caused completely removal of TNT. Two possible TNT biodegradation routes could be derived: (1) part of the TNT was transformed to nitrotoluene then transformed to nitrobenzene followed by the nitro substitute process, and trinitrobenzene, dinitrobenzene, and nitrobenzene were detected; and (2) TNT was transformed via the nitro substitute mechanism, and dinitrotoluene followed by nitrotoluene isomers were detected. The initial TNT degradation involved the reduction or removal of the nitro substitute to an amino derivative or free nitrite. Results show that the second route was the dominant TNT biodegradation pathway. The produced by-products were also degraded without significant accumulation during the degradation process. These findings would be helpful in designing a practical system inoculated with isolated TNT degradation strains for the treatment of TNT-contained groundwater.

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Removal of organic materials from TNT red water by Bamboo Charcoal adsorption

Cited by 75 publications

References 44 publications

Removal of organic pollutants from red water by magnetic-activated coke

Removal of organic pollutants from red water by magnetic-activated coke

Development of a chitin/graphene oxide hybrid composite for the removal of pollutant dyes: Adsorption and desorption study

Bioremediation of 2,4,6-trinitrotoluene-contaminated groundwater using unique bacterial strains: microcosm and mechanism studies

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