Sustainable efficient adsorbent: Alkali-acid modified magnetic biochar derived from sewage sludge for aqueous organic contaminant removal

Tang, Lin; Yu, Jiangfang; Pang, Ya; Zeng, Guangming; Deng, Yaocheng; Wang, Jiajia; Ren, Xin; Ye, Shujing; Peng, Bo; Feng, Haopeng

doi:10.1016/j.cej.2017.11.048

Cited by 539 publications

(130 citation statements)

References 44 publications

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“…[6] and during the adsorption of methyl orange on coffee grounds activated carbon [18], respectively. Similar works on thermodynamic studies have been carried out by Olajire et al [12] and Tanga et al [19]. Figure 16 shows the plot of the extent of adsorption with time.…”

Section: Thermodynamic Studysupporting

confidence: 64%

Adsorptive desulfurization of diesel using activated sewage sludge: kinetics, equilibrium and thermodynamics studies

2019

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Combustion of fossil fuels gives rise to sulfur oxides, which are harmful to the environment. Adsorptive desulfurization (ADS) of diesel was conducted using sewage sludge activated with H 2 O 2 as the oxidizing agent. A full 2 2 central composite response surface design was employed to determine optimum conditions for the production of activated sewage sludge (ASS). The adsorbent (ASS) was characterized using SEM, EDX and FTIR and the results of the analysis showed that it has the capacity to desulfurize diesel significantly. The ASS was subsequently used to conduct batch ADS of diesel with a view to investigate the kinetics, equilibrium and thermodynamics of the process. The optimum conditions established for the production of ASS using H 2 O 2 as the oxidizing agent were: temperature 400 °C and holding time 60 min. The Elovich model gave the best fit to the kinetic data of the ADS of diesel using ASS, while the equilibrium study showed that the Freundlich isotherm fitted the data at 35 °C better than Temkin and Langmuir isotherms. The positive values of the free energy and enthalpy changes revealed that the process was non-spontaneous and endothermic, respectively, while the negative entropy change is evidence of decrease in randomness of the adsorbed species. 33% desulfurization was achieved in 100 min during ADS of diesel showing that the adsorbent developed by activating SS with H 2 O 2 was very good and effective. Thus, ASS can be used to gain more insight into kinetics, equilibrium and thermodynamics of the ADS of middle-distillate petroleum fractions.

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Section: Thermodynamic Studysupporting

confidence: 64%

Adsorptive desulfurization of diesel using activated sewage sludge: kinetics, equilibrium and thermodynamics studies

2019

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“…The adsorption mechanism seems to proceed through H-bonding and π-π electron donor-acceptor interactions, which can explain the increase of the adsorption with pH raising from 5.0 to 9.0. Even higher tetracycline adsorption capacities were reported when using alkali-acid modified biochar with magnetic properties obtained from sewage sludge [167]. According to density functional theory model calculations, the adsorption mechanism was controlled by strong π-π stacking interaction and pore-filling.…”

Section: Diclofenacmentioning

confidence: 96%

A Review on the Synthesis and Characterization of Biomass-Derived Carbons for Adsorption of Emerging Contaminants from Water

et al. 2018

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This review analyzes the preparation and characterization of biomass-derived carbons and their application as adsorbents of emerging contaminants from water. The study begins by identifying the different types of emerging contaminants more often found in water streams, including a brief reference to the available technologies for their removal. It also describes the biomass sources that could be used for the synthesis of biochars and activated carbons (AC). The characterization of the adsorbents and the different approaches that can be followed to learn about the adsorption processes are also detailed. Finally, the work reviews literature studies focused on the adsorption of emerging contaminants on biochars and activated carbons synthesized from biomass precursors.

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“…Up to now, there have been several methods used for removal of organic pollutants such as flocculation, ion-exchange, reverse osmosis, adsorption, etc. [6][7][8]. A major drawback of these methods is related to the secondary polluted compounds that can be generated since the separated pollutants are not destroyed after detoxification [9,10].…”

Section: Introductionmentioning

confidence: 99%

Nanosized Zincated Hydroxyapatite as a Promising Heterogeneous Photo-Fenton-Like Catalyst for Methylene Blue Degradation

Doan

et al. 2019

Advances in Materials Science and Engineering

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This study is devoted to synthesis of nanosized zincated hydroxyapatite (Zn-HA) and its utilization as a heterogeneous photo-Fenton-like catalyst for degradation of methylene blue (MB) in aqueous solution. The prepared catalyst was characterized by various techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray, and Fourier transform infrared spectroscopy. The catalytic activity of Zn-HA towards MB and the effects of various experimental factors such as pH, zinc substitution degrees, initial MB concentration, and H2O2 dosage were studied in detail. The results showed that the zinc substitution degree of 0.4 is optimal to get the highest degradation efficiency under conditions of pH = 10, H2O2 dosage of 0.05 M, and MB concentration of 30 mg/L for a contact time of 120 min. The degradation mechanism was proposed and discussed thoroughly. Besides, the ability of long-term use for the synthesized catalyst was also evaluated.

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Sustainable efficient adsorbent: Alkali-acid modified magnetic biochar derived from sewage sludge for aqueous organic contaminant removal

Cited by 539 publications

References 44 publications

Adsorptive desulfurization of diesel using activated sewage sludge: kinetics, equilibrium and thermodynamics studies

Adsorptive desulfurization of diesel using activated sewage sludge: kinetics, equilibrium and thermodynamics studies

A Review on the Synthesis and Characterization of Biomass-Derived Carbons for Adsorption of Emerging Contaminants from Water

Nanosized Zincated Hydroxyapatite as a Promising Heterogeneous Photo-Fenton-Like Catalyst for Methylene Blue Degradation

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