Sorptive removal of phenolic endocrine disruptors by functionalized biochar: Competitive interaction mechanism, removal efficacy and application in wastewater

Ahmed, Mohammad Boshir; Zhou, John L.; Ngo, Huu Hao; Johir, Abu Hasan; Sornalingam, Kireesan

doi:10.1016/j.cej.2017.11.041

Cited by 127 publications

(36 citation statements)

References 38 publications

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“…The subsequent increase in pH resulted in a further decrease in the adsorption capacity of BC to bisphenol A. This is because the π-π electron donor-acceptor interaction (EDA) and hydrogen bonding between BC and BPA is weakened when the pH of the solution is greater than the acid dissociation constant of BPA [61]. The adsorption capacity of bisphenol A by MBC increased at first and then decreased with the increase of pH, and the maximum adsorption capacity occurred at pH = 6.…”

Section: Effects Of Initial Bpa Concentration and Temperaturementioning

confidence: 99%

Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar

Wang

Zhang

2020

IJERPH

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In this paper, biochar (BC) was prepared from discarded grapefruit peel and modified to prepare magnetic biochar (MBC). Physical and chemical properties of BC and MBC were characterized, and the results showed that the type of iron oxide loaded by MBC was γ-Fe2O3. Compared with BC, MBC has a larger specific surface area and pore volume, with more oxygen-containing functional groups on the surface. BC and MBC were used to adsorb and remove endocrine-disrupting chemical (EDC) bisphenol A (BPA) from simulated wastewater. The results showed that the adsorption kinetics and adsorption isotherm of BPA adsorption by BC and MBC were mainly in accordance with the pseudo-second-order kinetics model and the Langmuir model. This indicates that the adsorption of BPA on BC and MBC is mainly a chemically controlled monolayer adsorption. Adsorption thermodynamics show that BC and MBC adsorption of BPA is a spontaneous exothermic reaction, and lowering the temperature is conducive to the adsorption reaction. The effect of solution pH on the adsorption of BPA by both was significant. The optimum pH for BC and MBC to absorb BPA was 6 and 3, respectively. The concentration of Na+ in the range of 0–0.10 mol·L−1 can promote the adsorption of BPA to MBC. MBC loaded with γ-Fe2O3 not only has excellent magnetic separation ability, but can also reach about 80% of the initial adsorption capacity after four cycles of adsorption. By analyzing the adsorption mechanism, it was found that the H-bond and the π–π electron donor–acceptor interaction (EDA) were the main forces for BC and MBC to adsorb BPA.

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Section: Effects Of Initial Bpa Concentration and Temperaturementioning

confidence: 99%

Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar

Wang

Zhang

2020

IJERPH

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“…Therefore, repulsive interactions did not occur, which could justify the higher adsorption capacity of carbamazepine than for sulfamethoxazole. The adsorption of five endocrine disruptors, namely estrone (E1), 17β-estradiol (E2), estriol (E3), 17α-ethynylestradiol (EE2) and bisphenol A (BPA), on an activated carbon from Eucalyptus globulus wood activated with H 3 PO 4 was analyzed by Ahmed et al [220]. The authors concluded that π-π electron donor-acceptor interactions were responsible of adsorption.…”

Section: Contaminantmentioning

confidence: 99%

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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“…Yin [ 4 ] has reported that the activated magnetic biochars (AMBCs) could be used as an effective adsorbent for removing E2 (the highest capacity 153.2 mg·g −1 ) by one-step synthesis. Mohammad [ 14 ] has researched that functionalized biochar with enhanced functional groups, specific surface area, and meso- and macro-pores prepared could be successfully applied for the removal of six phenolic EDCs. Biochar has been universally employed as a functional material for adsorption known for its large specific surface area, high porosity, and high physicochemical stability [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Zhou

Liu

et al. 2020

IJERPH

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The occurrence of environmental endocrine disrupting chemicals (EDCs) in aquatic environments has caused extensive concern. Graphene-like magnetic sawdust biochar was synthesized using potassium ferrate (K2FeO4) to make activated sawdust biochar and applied for the removal of 17-estradiol (E2). The characterization showed that the surface morphology of five graphene-like magnetic sawdust biochars prepared with different preparation conditions were quite different. The specific surface area and pore structure increased with the increment of K2FeO4 addition. The results have shown that graphene-like magnetic sawdust biochar (1:1/900 °C) had the best removal on E2. The experimental results indicated that pseudo-first-order kinetic model and the Langmuir model could describe the adsorption process well, in which the equilibrium adsorption capacity (qe,1) of 1:1/900 °C were 59.18 mg·g−1 obtained from pseudo-first-order kinetic model and the maximum adsorption capacity (qmax) of 1:1/900 °C were 133.45 mg·g−1 obtained from Langmuir model at 298K. At the same time, lower temperatures, the presence of humic acid (HA), and the presence of NaCl could be regulated to change the adsorption reaction in order to remove E2. Adsorption capacity was decreased with the increase of solution pH because pH value not only changed the surface charge of graphene-like magnetic sawdust biochar, but also affected the E2 in the water. The possible adsorption mechanism for E2 adsorption on graphene-like magnetic sawdust biochar was multifaceted, involving chemical adsorption and physical absorption, such as H-bonding, π-π interactions, micropore filling effects, and electrostatic interaction. To sum up, graphene-like magnetic sawdust biochar was found to be a promising absorbent for E2 removal from water.

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Sorptive removal of phenolic endocrine disruptors by functionalized biochar: Competitive interaction mechanism, removal efficacy and application in wastewater

Cited by 127 publications

References 38 publications

Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar

Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar

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

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

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