Efficient simultaneous removal of cadmium and arsenic in aqueous solution by titanium-modified ultrasonic biochar

Luo, Mingke; Lin, Hai; He, Yinhai; Li, Bing; Dong, Yingbo; Wang, Liang

doi:10.1016/j.biortech.2019.03.108

Cited by 147 publications

(44 citation statements)

References 32 publications

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“…Cd(II) and As(III)], which Fig. 4 Isotherm adsorption of Cd(II) and As(III) on BC, α-FeOOH, and α-FeOOH@BC Table 2 Langmuir and Freundlich parameters for the adsorption of Cd(II) and As(III) on BC, α-FeOOH, and α-FeOOH@BC Table 4 Langmuir and Freundlich parameters for co-adsorption of Cd(II) and As(III) on BC, α-FeOOH, and α-FeOOH@BC were also similar to the previous findings (Luo et al 2019;Wu et al 2018a).…”

Section: Co-adsorptionsupporting

confidence: 85%

“…Additionally, the rate constants of pseudosecond-order (k 2 ) of Cd(II) and As(III) co-adsorption were 0.058 and 0.035, respectively, suggesting that the adsorption rate of α-FeOOH@BC for Cd(II) was faster than that for As(III). Luo et al (2019) obtained similar results in the co-adsorption of Cd(II) and As(V) on TiO 2 nanoparticles modified biochar.…”

Section: Co-adsorptionsupporting

confidence: 66%

“…5c, d, and Table 4. The Langmuir models (R 2 > 0.984 for Cd(II), R 2 > 0.896 for As(III)) could better describe the Cd(II) and As(III) co-adsorption process on BC, α-FeOOH, and α-FeOOH@ BC, indicating that the simultaneous adsorption of heavy metals on three adsorbents was a monolayer coverage (Luo et al 2019). The Langmuir maximum adsorption capacities (Q e ) of Cd(II) and As(III) on α-FeOOH@BC were 39.25 and 67.18 mg/g, respectively, which were 3.58 and 63.98 times higher than BC.…”

Section: Co-adsorptionmentioning

confidence: 98%

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Simultaneous removal of Cd(II) and As(III) from co-contaminated aqueous solution by α-FeOOH modified biochar

Zhu

Irshad

et al. 2020

Biochar

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A novel α-FeOOH modified wheat straw biochar (α-FeOOH@BC) was developed and the findings of the current study showed that α-FeOOH@BC is an efficient material for the simultaneous removal of cations (Cd(II)) and anions (As(III)) from aqueous solutions. The SEM, FTIR, and XRD analysis proved that α-FeOOH@BC was covered by α-FeOOH. In the single adsorption system, the maximum adsorption capacities of α-FeOOH@BC for Cd(II) and As(III) were 62.9 and 78.3 mg/g, respectively. In the dual adsorption system, the maximum adsorption capacities of α-FeOOH@BC for Cd(II) and As(III) dropped to 39.3 and 67.2 mg/g, respectively. The adsorption capacities of Cd(II) and As(III) by α-FeOOH@BC were much higher by BC and α-FeOOH both in single and dual adsorbate system. The adsorption results were well fitted by the Langmuir and pseudo-second-order kinetics models. The Cd(II) and As(III) co-adsorption on α-FeOOH@BC had a competitive effect, and the dominant adsorption mechanisms were co-precipitation and ion exchange. Our study showed that α-FeOOH@BC could be an effective remediation material for Cd(II) and As(III) co-adsorption from aqueous environment.

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Section: Co-adsorptionsupporting

confidence: 85%

Section: Co-adsorptionsupporting

confidence: 66%

Section: Co-adsorptionmentioning

confidence: 98%

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Simultaneous removal of Cd(II) and As(III) from co-contaminated aqueous solution by α-FeOOH modified biochar

Zhu

Irshad

et al. 2020

Biochar

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“…The literature survey indicate that the maximum adsorption capacity of different materials towards Cd 2+ and Pb 2+ are 7.28 and 7.39 [41], 80.64 and 93.45 mg/g [13], 29.23 and 31.44 [42], 92.4 and 94.5 mg/g [43] respectively, for cadmium and lead. Cadmium showed maximum adsorption capacities of 9-10 [44], 72.62 [45], 88.75 [46] 31.65 [47], 81.02 [48], 45.58 [49] and 21.6 mg/g [50]. Whereas, lead indicated maximum adsorption capacities of 97.5 [51], 417 [52], 263.6 [53] and 328.9 mg/g [54].…”

Section: Effect Of Carbon Dosagementioning

confidence: 94%

Surface oxidized and un-oxidized activated carbon derived from Ziziphus jujube Stem, and its application in removal of Cd(II) and Pb(II) from aqueous media

et al. 2020

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Agricultural waste based low cost oxidized activated carbon (OSD) and un-oxidized activated carbon (USD) samples were prepared from saw dust of Ziziphus jujube by chemical activation with phosphoric acid (H 3 PO 4 ). The activated carbon was used for the removal of toxic metal ions such as cadmium(II) and lead(II) from aqueous solutions. The effect of pH (2-9), initial concentration (70-100 mg/L), contact time (5-700 min), activated carbon dose (0.1-1.0 g) and temperature (298-328 K) was investigated. In addition, the kinetic study was performed at pH 6, while the carbon dose of 0.1 g was used for 40 mL solution of 70 mg/L at four different temperatures (298, 308, 318 and 328 K). The adsorption efficiency of USD was found higher than OSD. Comparatively higher uptake of Pb(II) ions was observed by each carbon sample. Pseudo-second order equation best fitted the experimental data. As such, both activated carbon samples (USD and OSD) exhibited higher adsorption capacities and faster kinetics which revealed their commercial usefulness.

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“…Biochar is a carbon rich material produced through pyrolysis of biomass at high temperatures (600-800° C) in an inert atmosphere [13]. Biochar has been widely used over the years for water treatment and remediation of soil due to its inherent properties such as high porosity, large surface area per unit volume and a good cation exchange capacity [14]. Biochar is usually produced from inexpensive, abundant and easily available biowastes derived from food and agricultural by-products [15].…”

Section: Introductionmentioning

confidence: 99%

Batch and continuous reactor studies for the adsorption of As(III) from wastewater using a hybrid biochar loaded with transition metal oxides: Kinetics and mass transfer analysis

Gupta

Giri

Rene

et al. 2020

Environmental Engineering Research

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As(III) presence in low concentration (1-5 mg/L) in water presents a challenging problem in its removal. In the present study, biochar prepared by pyrolysis of mustard cake and loaded with Fe-Mn binary oxides through hydrothermal technique was used for adsorptive removal of As(III) from water in batch and continuous mode. The synthesised biochar exhibited mesoporous structures in the range of 2-50 nm (based on BET analysis). The maximum adsorption capacity (95.7 mg/g) obtained using biochar loaded with both Fe-Mn oxides was found to be 1.4 times higher than that of pristine biochar. The adsorption equilibria was best described by Freundlich isotherm (based on R 2 and χ 2) suggesting that the As(III) adsorption was multilayered. The external mass transfer coefficients (β L = 10-5 cm 2 /s) were observed to be higher than film (D f = 10-7-10-9 cm 2 /s) and intraparticle (D i = 10-9 cm 2 /s) diffusivities in batch mode. In column studies, Thomas model gave the best correlation coefficient (R 2 > 0.95) and the adsorption was limited by external mass transfer. Kinetic rate constant decreased with increase in initial As(III) concentration and flow rate. The oxide loaded biochar exhibited reusability up to three times for As(III) removal.

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Efficient simultaneous removal of cadmium and arsenic in aqueous solution by titanium-modified ultrasonic biochar

Cited by 147 publications

References 32 publications

Simultaneous removal of Cd(II) and As(III) from co-contaminated aqueous solution by α-FeOOH modified biochar

Simultaneous removal of Cd(II) and As(III) from co-contaminated aqueous solution by α-FeOOH modified biochar

Surface oxidized and un-oxidized activated carbon derived from Ziziphus jujube Stem, and its application in removal of Cd(II) and Pb(II) from aqueous media

Batch and continuous reactor studies for the adsorption of As(III) from wastewater using a hybrid biochar loaded with transition metal oxides: Kinetics and mass transfer analysis

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