Removal of arsenic from water using pine leaves

Shafique, Umer; Ijaz, Aamir; Salman, Muhammad; Zaman, Waheed; Jamil, Nadia; Rehman, Rabia; Javaid, Amna

doi:10.1016/j.jtice.2011.10.006

Cited by 112 publications

(43 citation statements)

References 32 publications

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“…In case of higher agitation speed, As(V) particles have not enough time to make a bond with SAC-MBH due to random collisions among the participant particle. Similar type of agitation speed pattern was also found by the other researchers (Liu et al 2012;Shafique et al 2012). …”

Section: Effect Of Agitation Speedsupporting

confidence: 87%

Biosorptive uptake of arsenic(V) by steam activated carbon from mung bean husk: equilibrium, kinetics, thermodynamics and modeling

2017

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The present investigation emphasizes on the biosorptive removal of toxic pentavalent arsenic from water using steam activated carbon prepared from mung bean husk (SAC-MBH). Characterization of the synthesized sorbent was done using different instrumental techniques, i.e., SEM, BET and point of zero charge. Sorptive uptake of As(V) over steam activated MBH as a function of pH (3-9), agitation speed (40-200 rpm), dosage (50-1000 mg) and temperature (298-313 K) was studied by batch process at arsenic concentration of 2 mg L -1 . Lower pH increases the arsenic removal over the pH range of 3-9. Among three adsorption isotherm models examined, Langmuir model was observed to show superior results over Freundlich model. The mean sorption energy (E) estimated by Dubinin-Radushkevich model suggested that the process of adsorption was chemisorption. Thermodynamic parameters confer that the sorption process was spontaneous, exothermic and feasible in nature. The pseudo-second-order rate kinetics of arsenic gave better correlation coefficients as compared to pseudo-first-order kinetics equation. Three process parameters, viz. adsorbent dosage, agitation speed and pH were opted for optimizing As(V) elimination using central composite design matrix of response surface methodology (RSM). The identical design setup was used for artificial neural network (ANN) for comparing its prediction capability with RSM towards As(V) removal. Maximum arsenic removal was observed to be 98.75% at sorbent dosage 0.75 gm L -1 , pH 3.0, agitation speed 160 rpm and temperature 308 K. The study concluded that SAC-MBH could be a competent adsorbent for As(V) removal and ANN model was better in arsenic removal predictability results than RSM model.

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Section: Effect Of Agitation Speedsupporting

confidence: 87%

Biosorptive uptake of arsenic(V) by steam activated carbon from mung bean husk: equilibrium, kinetics, thermodynamics and modeling

2017

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“…It is an ultra-trace nutrient and its insufficiency can cause inhibited growth; however it can be a severe poison to animals, plants and human beings while consumption just exceeds the required level [2]. The main natural processes attributed for its increasing concentration in water sources are geothermal dissolution of minerals and ores [3] and volcanic emission [2]. The main industrial routes contributing to anthropogenic arsenic pollution of water tables are mining, smelting of non-ferrous metals, burning of fossil fuel, usage of pesticides, processing of wool and cotton, use of arsenic based wood preservative etc.…”

Section: Introductionmentioning

confidence: 99%

SD/MnFe2O4 composite, a biosorbent for As(III) and As(V) removal from wastewater: Optimization and isotherm study

Podder

Majumder

2015

Journal of Molecular Liquids

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“…1e). In previous work [24,25], it has been shown that NZVI would be covered by a layer of iron oxide or hydroxide, demonstrating a core-shell structure after exposure to air. In summary, NZVI particles dispersed onto GAC had good stability and dispensability from the above SEM and TEM (Fig.…”

Section: Morphology Analysismentioning

confidence: 91%

Characterization of nanoscale zero-valent iron supported on granular activated carbon and its application in removal of acrylonitrile from aqueous solution

Xiao

Gao

Yue

et al. 2015

Journal of the Taiwan Institute of Chemical Engineers

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Removal of arsenic from water using pine leaves

Cited by 112 publications

References 32 publications

Biosorptive uptake of arsenic(V) by steam activated carbon from mung bean husk: equilibrium, kinetics, thermodynamics and modeling

Biosorptive uptake of arsenic(V) by steam activated carbon from mung bean husk: equilibrium, kinetics, thermodynamics and modeling

SD/MnFe2O4 composite, a biosorbent for As(III) and As(V) removal from wastewater: Optimization and isotherm study

Characterization of nanoscale zero-valent iron supported on granular activated carbon and its application in removal of acrylonitrile from aqueous solution

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