A review on reactive adsorption for potential environmental applications

Sharma, Manisha; Vyas, Raj K.; Singh, Kanhaiya

doi:10.1007/s10450-012-9436-9

Cited by 62 publications

(24 citation statements)

References 127 publications

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“…Various regeneration procedures such as acid/alkali regeneration, thermal regeneration, solvent extraction, etc. have been adopted by researchers depending upon the type of adsorbate-adsorbent system [49]. In the present study, AA may be regenerated by caustic regeneration while regeneration of CFA may be achieved by H 2 O 2 treatment [50], alkali regeneration [11], or thermal regeneration procedure.…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

Kinetics, equilibrium and thermodynamics of ciprofloxacin hydrochloride removal by adsorption on coal fly ash and activated alumina

Maheshwari

Vyas

Sharma

2013

Desalination and Water Treatment

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A B S T R A C TIn this study, performance of two different adsorbents namely, activated alumina (AA) and coal fly ash (CFA) have been examined for the removal of an antibiotic Ciprofloxacin hydrochloride (CPH) from its aqueous solution. Batch adsorption experiments were conducted to study the effect of various operational parameters such as pH, initial antibiotic concentration, adsorbent dose, and temperature on the adsorption process. The optimal pH for CPH adsorption was found to be 4. The adsorption kinetics was evaluated at different initial antibiotic concentrations and temperatures. Kinetics of adsorption, in all cases, followed pseudosecond-order rate equation for both the adsorbents. Adsorption of CPH was well described by Freundlich isotherm. Thermodynamic analysis unveiled the feasibility, spontaneity, and endothermic nature of overall adsorption process at higher temperatures. Values of DG˚for CFA and AA are À0.029 and À2.714 kJ/mol, respectively, at 328 K. The corresponding values for DH˚are 6.572 and 28.408 kJ/mol and that of DS˚are 0.020 and 0.093 kJ/mol K, respectively. The study is significant in designing the water treatment plants for the removal of CPH. Overall, it was concluded that AA is a better adsorbent than CFA for the removal of CPH from its aqueous solution.

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Section: Thermodynamic Studiesmentioning

confidence: 99%

Kinetics, equilibrium and thermodynamics of ciprofloxacin hydrochloride removal by adsorption on coal fly ash and activated alumina

Maheshwari

Vyas

Sharma

2013

Desalination and Water Treatment

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“…Firstly, there are preventive actions that entail the optimization of combustion processes to reduce NO x emissions. The catalytic reduction, effective for treatment and denitrification of flue gases, requires reaction temperatures above 300 °C and the addition of chemical reducing agents such as ammonia and hydrocarbons, therefore it is not an ecologically viable technique for removing NO x in the atmosphere at room temperature and from natural agents, as by products formed may affect the biogeochemical cycle (Yao et al 2010, Sharma et al 2012.…”

Section: No X Removal By Activated Carbon Fibersmentioning

confidence: 99%

Adsorption of SOX and NOX in activated viscose fibers

Plens

Monaro

Coutinho

2015

An. Acad. Bras. Ciênc.

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SO x and NO x are emissions resulting from combustion processes and are the main agents that contribute to the formation of acid rain, which causes harm to humans and the environment. Several techniques for removing these pollutants are applied in i.e. oil refineries, thermoelectric that use petroleum oils and vehicular pollution. Among these, highlight the adsorption of contaminants by the usage of activated carbon fibers and activated carbon, which are characterized by high surface area and uniform distribution of pores, providing appropriate conditions for application in processes of removing environmental contaminants. In the present work, activated viscose fibers (AVF) were prepared and applied in adsorption experiments of NO and SO 2 . The materials produced showed high values of surface area, with a predominance of micro pores with diameters in the range of 1.0 nm. The AVF had satisfactory performance in the removal of contaminants and are compatible with other synthetic fibers. Thus, the formation of active sites of carbon provides contaminants adsorption, demonstrating that carbon fibers cloth can be applied for the removal of pollutants.

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“…Indeed, reactive 60 adsorption increases the rate of production/degradation by a 61 significant proportion as compared to simple adsorption [19,23]. 62 The advantage of reactive adsorption over simple adsorption is that 63 reaction and separation occurs simultaneously during adsorption 64 in a single unit operation [9]. Reactive degradation of dye 65 molecules almost completely removes the color and may render 66 the wastewater much less harmful [19].…”

Section: Introductionmentioning

confidence: 99%

“…8 Approximately 32 L of water is consumed in dyeing per kilograms of 9 textile produced which constitutes about 16% of the total water 10 consumed in textile manufacture [1]. An average sized textile mill 11 with a production of 0.6 million m fabric per day discharges 1500 m 3 / 12 day of waste water in India [2].…”

Section: Introductionmentioning

confidence: 99%

“…24 Among all other physicochemical methods, adsorption is the 25 superior technique owing to its easy availability, low cost, high 26 efficiency, ease of operation and ability to treat more concentrated 27 dyes [8]. Activated carbon is widely used in wastewater treatment 28 because of its efficacy and versatility [9]. Different types of low cost 29 adsorbents namely, neem (Azadirachta indica) leaf powder [10], 30 Indian rosewood sawdust [7], wheat shells [8] and can papyrus [11] 31 have also been studied for MB removal from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

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