Comparing adsorption properties of NH 4 Cl-modified activated carbon towards chlortetracycline antibiotic with those of commercial activated carbon

Alahabadi, Ahmad; Hosseini-Bandegharaei, Ahmad; Moussavi, Gholamreza; Amin, Bahareh Golrokh; Rastegar, Ayoob; Karimi-Sani, Hamidreza; Fattahi, Mojtaba; Miri, Mohammad

doi:10.1016/j.molliq.2017.02.077

Cited by 75 publications

(21 citation statements)

References 71 publications

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“…Nonetheless, the removal efficiency performances vs. the amount of biochar used are still lower for commercial activated charcoal due to the higher specific surface area of commercial AC (1024 m 2 /g) (Alahabadi et al 2017). This is why an activation process can be presumed to be a particularly suitable way to improve and enhance the surface properties and microporosity, and hence the removal efficiency of organic and inorganic contaminants in wastewater.…”

Section: Introductionmentioning

confidence: 99%

One-pot activation and pyrolysis of Moroccan Gelidium sesquipedale red macroalgae residue: production of an efficient adsorbent biochar

Tayibi

Monlau²,

Fayoud

et al. 2019

Biochar

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One-pot chemical activation and pyrolysis process was developed for biochar production from red macroalgae residue of Gelidium sesquipedale. The macroalgae residue was activated by various catalysts (KOH, NaOH, H 3 PO 4 , and CH 4 ON 2 ) with the two concentrations (2.5 wt% and 5 wt%) using a pulverization system followed by slow pyrolysis at 500 °C. The activated biochars showed a porous morphology with an increase of water holding capacity compared to the unactivated one. The properties of activated biochar observed by further characterization (i.e., FTIR, SEM, TGA) revealed their feasibility to be used as an adsorbent. The results of adsorption experiment confirmed that adsorption was dependent not only on the surface area but also on the surface charge, and functional groups. The sorption performance of activated biochars (AcBC), in terms of the adsorption of methylene blue, was comparable to commercial activated charcoal (Norit ® ). NaOH (2.5 wt%)activated biochar had the removal efficiency of 87% versus 97% for commercial activated charcoal.

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Section: Introductionmentioning

confidence: 99%

One-pot activation and pyrolysis of Moroccan Gelidium sesquipedale red macroalgae residue: production of an efficient adsorbent biochar

Tayibi

Monlau²,

Fayoud

et al. 2019

Biochar

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“…Values of 1 > n, 1-2, and 2-10 represent weak, favorable, and good adsorption conditions, respectively. A plot of lnq e vs, lnC e would give n and K F from the slope and intercept, respectively [41]. Linear isotherms of the Langmuir and Freundlich models are shown in Fig.…”

Section: Isotherms Of Phenol Adsorptionmentioning

confidence: 99%

“…The adsorption capacity of adsorbents strongly depends on the activation method and the conditions of production [20]. In chemical activation processes and preparation of activated carbons, the adsorbent can be saturated (soaked) with a chemical material and pyrolyzed at a specific temperature [40,41]. By the employment of a beneficial method of activation, surface area and porosity of the adsorbent significantly increase, and functionality is modified, which altogether improve the adsorption properties of the activated carbon toward special pollutants and consequently leads to decreasing the amount of activated carbon consumption [41].…”

Section: Introductionmentioning

confidence: 99%

“…In chemical activation processes and preparation of activated carbons, the adsorbent can be saturated (soaked) with a chemical material and pyrolyzed at a specific temperature [40,41]. By the employment of a beneficial method of activation, surface area and porosity of the adsorbent significantly increase, and functionality is modified, which altogether improve the adsorption properties of the activated carbon toward special pollutants and consequently leads to decreasing the amount of activated carbon consumption [41]. In the present work, in the light of the need for production of new beneficial adsorbents, RHA was exploited for preparation of a more effective activated adsorbent for phenol removal from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

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Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

Jafari¹,

Alahabadi²,

Saghi³

et al. 2019

Desalination and Water Treatment

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Phenol can cause environmental problems due to low biological degradation, high toxicity and long persistence in the environment. Thus, the removal of phenol and its derivatives from water is of great importance. Application of agricultural waste materials has been intensively investigated for many years for adsorptive removal of active pollutants. The objective of this research was to improve the adsorption capacity of rice husk ash by activation with different chemical agents for removing phenol from aqueous solutions. Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller (BET), and field emission electron scanning microscopy techniques were used for characterization, and the modified rice ash husk was compared with the conventional one. Results indicated that the effect of chemical treatment by NH 4 Cl was better than the other tested chemical agents. The BET specific surface area of NH 4 Cl-activated rice husk ash (ARHA) was 543 m 2 /g, and the average pore diameter was 3.24 nm. The isotherm and kinetic studies of phenol removal by ARHA showed that the Langmuir model and the pseudo-second-order equation represented the best fit with the adsorption data. The maximum adsorption capacity of phenol onto the newly activated rice husk ash was obtained from the Langmuir isotherm model, which was 66 mg/g.

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“…Since the initial concentration of adsorbate affects on the adsorption efficiency of adsorbent towards adsorbate (Alahabadi et al, 2017), the impact of initial P concentration on adsorption was investigated in the range of 20-100 mg L -1 . As presented in Fig.…”

Section: Effect Of Initial P Concentrationmentioning

confidence: 99%

Thermally treated aluminium waste-filings, a low cost and efficient adsorbent for phosphorus removal from water

Qasemi¹,

Hosseini-Bandegharaei²,

Afsharnia³

et al. 2018

Global NEST Journal

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<p>A facile strategy toward modification of aluminium filings (AF), a waste material from aluminium manufacturing industry, into a highly efficient adsorbent was examined. AF was simply treated with thermal modification to form a cheap adsorbent for Phosphorus (P) removal from aqueous solutions. The results showed that increasing the calcination temperature from 500 to 900 ˚C improved the P removal. P adsorption occurred quite fast and 70% of P removal observed in 15 minutes. Adsorption efficiency was increased by increasing pH, decreasing P initial concentration as well. The presence of coexisting anions, except HCO3-, showed a negligible effect on P adsorption by AF. Thermodynamic studies revealed that P adsorption onto AF was endothermic in nature. Kinetic modelling demonstrated that the adsorption rate was controlled by the chemisorption. The process also fitted well with the Langmuir isotherm model, indicating that the process proceeds via monolayer coverage with 49.97 mg g-1 maximum monolayer capacity. Overall, in addition to beneficial environmental and economic aspects, the results demonstrated excellent adsorption characteristics which make thermally treated AF a promising adsorbent material for phosphorus removal from polluted streams.</p>

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Comparing adsorption properties of NH 4 Cl-modified activated carbon towards chlortetracycline antibiotic with those of commercial activated carbon

Cited by 75 publications

References 71 publications

One-pot activation and pyrolysis of Moroccan Gelidium sesquipedale red macroalgae residue: production of an efficient adsorbent biochar

One-pot activation and pyrolysis of Moroccan Gelidium sesquipedale red macroalgae residue: production of an efficient adsorbent biochar

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

Thermally treated aluminium waste-filings, a low cost and efficient adsorbent for phosphorus removal from water

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