Preparation of iminodiacetic acid-modified magnetic biochar by carbonization, magnetization and functional modification for Cd(II) removal in water

Zhou, Xiaohui; Zhou, Jianjun; Liu, Yaochi; Guo, Jing; Ren, Jia-Lin; Zhou, Fang

doi:10.1016/j.fuel.2018.06.075

Cited by 99 publications

(24 citation statements)

References 34 publications

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“…In order to further study this adsorption process, Langmuir and Freundlich models were simulated in the adsorption isotherm data. All equilibrium data were fitted by using the linear forms described by the following equations:

\frac{{normalC}_{normale}}{{normalQ}_{normale}} = \frac{1}{k_{L} Q_{m}} + \frac{{normalC}_{normale}}{{normalQ}_{normalm}}

ln Q_{e} = ln k_{f} + \frac{1}{n} ln C_{e}

where Q e (mg/g) and Q m (mg/g) are the adsorption ability in equilibrium and the theoretical maximum adsorption capacity, respectively; k L (l/mg) represents the affinity constant; C e (mg/l) is the adsorbates concentration at equilibrium; k f (mg/g) represents the Freundlich adsorption constant; and n represents the adsorption intensity.…”

Section: Resultsmentioning

confidence: 99%

Section: Adsorption Isothermmentioning

confidence: 99%

“…The harmful impacts of heavy metals in the environment are mainly attributed to the fact that they cannot be degraded biologically towards animals, plants and human beings . Many technologies, such as membrane filtration, electrolysis, ion‐exchange, adsorption and precipitation, have been studied for the treatment of heavy metals in effluents. Specially, adsorption is considered to be one of the most effective methods for removal of contaminants .…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Pb (II) adsorption in aqueous of 2D/2D g‐C₃N₄/MnO₂ composite

Guo

Chen

Zhou

et al. 2019

Applied Organom Chemis

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A novel g‐C3N4/MnO2 composite was prepared by in situ deposition of MnO2 on graphitic carbon nitride (g‐C3N4) nanosheets, and its adsorption properties were evaluated for removal of Pb (II) in aqueous. Fourier transform‐infrared, spectrometer scanning electron microscopy and transmission electron microscopy characterization showed the g‐C3N4/MnO2 composite had a two‐dimensional/two‐dimensional (2D/2D) structure with ample active sites. The Brunauer–Emmett–Teller specific surface area of g‐C3N4/MnO2 composites (234.9 m2/g) was 13.5 times larger than that of g‐C3N4 (17.37 m2/g), providing better conditions for adsorption. The adsorption kinetic data were better fitted with the pseudo‐second‐order model. The Langmuir model was more suitable for describing the experimental equilibrium data of g‐C3N4/MnO2, and the maximum adsorption capacity was 204.1 mg/g for Pb (II). The adsorption of g‐C3N4/MnO2 composite for Pb (II) was an endothermic and spontaneous process, and reached adsorption equilibrium rapidly within initial 150 min. This composite was an excellent adsorbent because of its higher adsorption capacity and facile preparation progress.

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\frac{{normalC}_{normale}}{{normalQ}_{normale}} = \frac{1}{k_{L} Q_{m}} + \frac{{normalC}_{normale}}{{normalQ}_{normalm}}

ln Q_{e} = ln k_{f} + \frac{1}{n} ln C_{e}

Section: Resultsmentioning

confidence: 99%

Section: Adsorption Isothermmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation and Pb (II) adsorption in aqueous of 2D/2D g‐C₃N₄/MnO₂ composite

Guo

Chen

Zhou

et al. 2019

Applied Organom Chemis

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“…HNO 3 modification significantly (p < 0.05) increased BC carboxyl, carbonyl, and total acidic oxygen-containing functional group amounts with the greatest extent among all the four modification methods. The acidic oxygen-containing functional group of HNO 3 -modified BC released H + , making the lowest value of pH pzc [24]. Moreover, the corrosion effect of HNO 3 on BC pore walls led to increased specific surface area and total pore volume [25].…”

Section: Effects Of Different Modification Methods On Biochar Physicomentioning

confidence: 99%

Ammonium removal efficiency of biochar-based heterotrophic nitrifying bacteria immobilization body in water solution

Wang

Ren

Qiao

et al. 2020

Environmental Engineering Research

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In order to explore the performance of biochar-based microbial immobilization body in ammonium removal from water and potential mechanisms, a strain of heterotrophic nitrifying bacteria (HNB) was isolated from activated sludge, and the biochemical and molecular biological identification of HNB was carried out. Moreover, HNO3-, Mg2+-, NaOH-, and NaOH+Mg2+-modified rice husk-derived biochars were prepared. Then all the five kinds of biochars, including the original biochar, were used as carriers of HNB to remove NH4+-N from water. Results showed that HNB was classified as Pseudomonas, and the 72-h NH4+-N removal ratio of the free bacteria reached 80.24%. Compared with biochar itself, biochar-based HNB immobilization body showed a much stronger ability to remove NH4+-N, especially for NaOH- and NaOH+Mg2+-modified biochars. At the initial NH4+-N concentration of 100 mg/L and biochar addition dose of 10 g/L, NH4+-N removal ratio of NaOH- and NaOH+Mg2+-modified biochar-based HNB immobilization bodies reached 57.78% and 58.35% after 5 h, and reached 88.66% and 90.93% after 48 h respectively, which were obviously higher than the original, HNO3- and Mg2+-modified biochar-based HNB immobilization bodies. The phenomenon resulted from significantly higher bacteria adsorption ability of NaOH- and NaOH+Mg2+-modified biochars, which reached 773.75 and 941.17 nmol P/g biochar, respectively.

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“…The synthesis of APTES-ECH-IDA was based on previous reports. [39][40][41] Typically, 1.0 g IDA was dissolved in 25 mL deionized water containing 1.2 g NaOH. Then, 1.2 mL epichlorohydrin was added and reacted at 40 C for 4 hours.…”

Section: Preparation Of Ni-mnpsmentioning

confidence: 99%

Synthesis of magnetic nanoparticles with an IDA or TED modified surface for purification and immobilization of poly-histidine tagged proteins

et al. 2020

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Preparation of iminodiacetic acid-modified magnetic biochar by carbonization, magnetization and functional modification for Cd(II) removal in water

Cited by 99 publications

References 34 publications

Preparation and Pb (II) adsorption in aqueous of 2D/2D g‐C₃N₄/MnO₂ composite

Preparation and Pb (II) adsorption in aqueous of 2D/2D g‐C₃N₄/MnO₂ composite

Ammonium removal efficiency of biochar-based heterotrophic nitrifying bacteria immobilization body in water solution

Synthesis of magnetic nanoparticles with an IDA or TED modified surface for purification and immobilization of poly-histidine tagged proteins

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Preparation of iminodiacetic acid-modified magnetic biochar by carbonization, magnetization and functional modification for Cd(II) removal in water

Cited by 99 publications

References 34 publications

Preparation and Pb (II) adsorption in aqueous of 2D/2D g‐C3N4/MnO2 composite

Preparation and Pb (II) adsorption in aqueous of 2D/2D g‐C3N4/MnO2 composite

Ammonium removal efficiency of biochar-based heterotrophic nitrifying bacteria immobilization body in water solution

Synthesis of magnetic nanoparticles with an IDA or TED modified surface for purification and immobilization of poly-histidine tagged proteins

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Preparation and Pb (II) adsorption in aqueous of 2D/2D g‐C₃N₄/MnO₂ composite

Preparation and Pb (II) adsorption in aqueous of 2D/2D g‐C₃N₄/MnO₂ composite