Evaluation of lead(II) biosorption kinetics and isotherms from aqueous solution with dry Myriophyllum spicatum powder

Chemically activated biochars prepared from sorghum distillers grain using two base activators (NaOH and KOH) were investigated for their adsorption properties with respect to ammonium nitrogen from aqueous solution. Detailed characterizations, including scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetry (TG), and specific surface area analyses, were carried out to offer a broad evaluation of the prepared biochars. The results showed that the NaOH- and KOH-activated biochars exhibited significantly enhanced adsorption capacity, by 2.93 and 4.74 times, respectively, in comparison with the pristine biochar. Although the NaOH-activated biochar possessed larger specific surface area (132.8 and 117.7 m2/g for the NaOH- and KOH-activated biochars, respectively), the KOH-activated biochar had higher adsorption capacity owing to its much higher content of functional groups. The adsorption kinetics and isotherms of the KOH-activated biochar at different temperatures were further studied. The biochar had a maximum adsorption capacity of 14.34 mg/g at 45 °C, which was satisfactory compared with other biochars prepared using different feedstocks. The adsorption process followed pseudo-second-order kinetics, and chemical adsorption was the rate-controlling step. The equilibrium data were consistent with the Freundlich isotherm, and the thermodynamic parameters suggested that the adsorption process was endothermic and spontaneous. Consequently, this work demonstrates that chemically activated biochar from sorghum distillers grain is effective for ammonium nitrogen removal.

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Novel carbon based bioactive nanocomposites of aniline/indole copolymer for removal of cationic dyes from aqueous solution: kinetics and isotherms

New Journal of Chemistry ◽

10.1039/c8nj02924e ◽

2019 ◽

Vol 43 (5) ◽

pp. 2400-2410 ◽

Cited By ~ 1

Author(s):

Mona Rouhi ◽

Moslem Mansour Lakouraj ◽

Hamed Tashakkorian ◽

Vahid Hasantabar

Keyword(s):

Carbon Nanotubes ◽

Aqueous Solution ◽

Graphene Oxide ◽

Emulsion Polymerization ◽

Cationic Dyes ◽

Kinetics And Isotherms ◽

Solution Kinetics ◽

Carbon Based

In this study, a copolymer of aniline and indole P(ANI-co-IN) and its nanocomposites based on graphene oxide (GO) and functional carbon nanotubes (CNT-COOH) were synthesized by heterogeneous emulsion polymerization.

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Adsorption of Toluene and Paraxylene from Aqueous Solution Using Pure and Iron Oxide Impregnated Carbon Nanotubes: Kinetics and Isotherms Study

Bioinorganic Chemistry and Applications ◽

10.1155/2017/2853925 ◽

2017 ◽

Vol 2017 ◽

pp. 1-11 ◽

Cited By ~ 18

Author(s):

Aamir Abbas ◽

Basim Ahmed Abussaud ◽

Ihsanullah ◽

Nadhir A. H. Al-Baghli ◽

Halim Hamid Redhwi

Keyword(s):

Carbon Nanotubes ◽

Aqueous Solution ◽

Iron Oxide ◽

Multiwall Carbon Nanotubes ◽

Freundlich Isotherm ◽

Nitrogen Adsorption ◽

Isotherm Models ◽

Batch Adsorption ◽

Adsorption Analysis ◽

Kinetics And Isotherms

Multiwall carbon nanotubes (CNTs) and iron oxide impregnated carbon nanotubes (CNTs-iron oxide) were investigated for the adsorption of hazardous toluene and paraxylene (p-xylene) from aqueous solution. Pure CNTs were impregnated with iron oxides nanoparticles using wet impregnation technique. Various characterization techniques including thermogravimetric analysis, scanning electron microscopy, elemental dispersion spectroscopy, X-ray diffraction, and nitrogen adsorption analysis were used to study the thermal degradation, surface morphology, purity, and surface area of the materials. Batch adsorption experiments show that iron oxide impregnated CNTs have higher degree of removal of p-xylene (i.e., 90%) compared with toluene (i.e., 70%), for soaking time 2 h, with pollutant initial concentration 100 ppm, at pH 6 and shaking speed of 200 rpm at 25°C. Pseudo-second-order model provides better fitting for the toluene and p-xylene adsorption. Langmuir and Freundlich isotherm models demonstrate good fitting for the adsorption data of toluene and p-xylene.

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Investigations on the mechanism, kinetics and isotherms of ammonium and humic acid co-adsorption at low temperature by 4A-molecular sieves modified from attapulgite

RSC Advances ◽

10.1039/c7ra00268h ◽

2017 ◽

Vol 7 (28) ◽

pp. 17095-17106 ◽

Cited By ~ 9

Author(s):

Nan Sun ◽

Wenxin Shi ◽

Lixin Ma ◽

Shuili Yu

Keyword(s):

Heavy Metals ◽

Aqueous Solution ◽

Humic Acid ◽

Low Temperature ◽

Molecular Sieves ◽

Co Adsorption ◽

Aluminum Silicate ◽

Silicate Mineral ◽

Magnesium Aluminum Silicate ◽

Kinetics And Isotherms

Attapulgite (ATP) is a type of natural magnesium aluminum silicate mineral and has been applied as an adsorbent to remove organic pollutants and heavy metals in aqueous solution.

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Biosorptive removal of uranium(VI) from aqueous solution by Myriophyllum spicatum

10.5004/dwt.2018.22020 ◽

2018 ◽

Vol 105 ◽

pp. 273-281 ◽

Cited By ~ 1

Author(s):

Zheng-ji Yi ◽

Jun Yao ◽

Mi-jia Zhu ◽

Hui-lun Chen ◽

Fei Wang ◽

...

Keyword(s):

Aqueous Solution ◽

Myriophyllum Spicatum

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Kinetics and Isotherms Studies of methylene blue Basic Dye from Aqueous Solution onto Selenicereus grandiflorus Activated Carbon

Asian Journal of Materials Chemistry ◽

10.14233/ajmc.2019.ajmc-p71 ◽

2019 ◽

Vol 4 (1-2) ◽

pp. 1-6

Author(s):

M. Mahadeva Swamy ◽

B.M. Nagabhushana ◽

Nagaraju Kottam

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Activated Carbon ◽

Point Of Zero Charge ◽

Blue Dye ◽

Methylene Blue Dye ◽

Batch Mode ◽

Adsorption Studies ◽

Kinetics And Isotherms ◽

Adsorbent Dose

The present experiment explains the effectiveness of adsorption studies of methylene blue dye from aqueous solutions on activated carbon from Selenicereus grandiflorus (SG) treated with conc. sulfuric acid. The sulphuric acid-treated Selenicereus grandiflorus activated carbon (SGAC) was used as low-cost adsorbent for the removal of methylene blue dye from aqueous solution. It suggests an ideal alternative method to adsorption of dye compared to other expensive treatment options. The adsorption studies have been conducted at different experimental parameters, i.e., pH, contact time, adsorbent dose and initial dye concentration. The batch mode experiments were conducted by different adsorbent dose (0.03-0.150 g per 50 mL), pH of the solution (2-12), effect of time (3-18 min), initial dye concentration (10 mg/L), point of zero charge and regeneration of spent adsorbent studies. Langmuir model shows better fit to the equilibrium data (R2 = 0.966) than Freundlich model. The adsorption capacity (Qm) of SGAC increases with increasing dosage where Qm is 16.17 mg g-1.

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