Enhanced adsorption of bisphenol A and sulfamethoxazole by a novel magnetic CuZnFe2O4–biochar composite

Heo, Jiyong; Yoon, Yeomin; Lee, Gooyong; Kim, Yejin; Han, Jung-Geun; Park, Chang Min

doi:10.1016/j.biortech.2019.02.091

Cited by 239 publications

(56 citation statements)

References 47 publications

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“…S5), meaning that the alkaline activation and magnetization did not change the adsorption kinetics pattern. Similar results were also reported by previous studies performed to explore the feasibility of using BC and magnetic BC derived from biomass to remove organic pollutants from aqueous solution [29,30]. For pseudo-second order model, the initial adsorption rate r (mg (g min) −1 ) is proportion to the adsorption equilibrium capacity and can be calculated using the equation as        [31].…”

Section: Rhb Adsorption Kineticssupporting

confidence: 79%

Magnetic biochar from alkali-activated rice straw for removal of rhodamine B from aqueous solution

Ren

Chen

Wang

et al. 2019

Environmental Engineering Research

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To address organic dye wastewater, economic and effective adsorbents are required. Here, magnetic biochar from alkali-activated rice straw (AMBC) was successfully synthesized using one-step magnetization and carbonization method. The alkaline activation caused the large specific surface area, high pore volume and abundant oxygen-containing groups of the AMBC, and the magnetization gave the AMBC a certain degree of electropositivity and fast equilibrium characteristics. These characteristics collectively contributed to a relative high adsorption capacity of 53.66 mg g<sup>−1</sup> for this adsorbent towards rhodamine B (RhB). In brief, RhB can spontaneously adsorb onto the heterogeneous surface of the AMBC and reach the equilibrium in 60 min. Although the initial pH, ionic strength and other substances of the solution affected the adsorption performance of the AMBC, it could be easily regenerated and reused with considerable adsorption content. Based on the results, H-bonds, π–π stacking and electrostatic interactions were speculated as the primary mechanisms for RhB adsorption onto the AMBC, which was also demonstrated by the FTIR analysis. With the advantageous features of low cost, easy separation, considerable adsorption capacity and favorable stability and reusability, the AMBC would be a potential adsorbent for removing organic dyes from wastewater.

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Section: Rhb Adsorption Kineticssupporting

confidence: 79%

Magnetic biochar from alkali-activated rice straw for removal of rhodamine B from aqueous solution

Ren

Chen

Wang

et al. 2019

Environmental Engineering Research

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“…The increment of pH results in a more negatively charged surface as well as more negatively charged SMX species and thus a lower deposition of SMX onto the biochar surface. Even if SMX interacts with the C=C bonds, as has been reported in the literature [36], the negative charge increases and should be partially neutralized. As can be seen, SMX concentrations up to 500 µg/L can saturate the surface with the adsorption maximum being about 150 µg/g of the biochar (BC).…”

Section: Adsorption Capacitymentioning

confidence: 51%

Activation of Persulfate by Biochars from Valorized Olive Stones for the Degradation of Sulfamethoxazole

et al. 2019

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Biochars from spent olive stones were tested for the degradation of sulfamethoxazole (SMX) in water matrices. Batch degradation experiments were performed using sodium persulfate (SPS) as the source of radicals in the range 250–1500 mg/L, with biochar as the SPS activator in the range 100–300 mg/L and SMX as the model micro-pollutant in the range 250–2000 μg/L. Ultrapure water (UPW), bottled water (BW), and secondary treated wastewater (WW) were employed as the water matrix. Removal of SMX by adsorption only was moderate and favored at acidic conditions, while SPS alone did not practically oxidize SMX. At these conditions, biochar was capable of activating SPS and, consequently, of degrading SMX, with the pseudo-first order rate increasing with increasing biochar and oxidant concentration and decreasing SMX concentration. Experiments in BW or UPW spiked with various anions showed little or no effect on degradation. Similar experiments in WW resulted in a rate reduction of about 30%, and this was attributed to the competitive consumption of reactive radicals by non-target water constituents. Experiments with methanol and t-butanol at excessive concentrations resulted in partial but generally not complete inhibition of degradation; this indicates that, besides the liquid bulk, reactions may also occur close to or on the biochar surface.

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“…The iron tailoring enabled a higher adsorption performance along with an easier separation and recovery process in the post-adsorption stage when using a simple magnet. A similar approach was applied by Heo et al [161], who used a CuZnFe 2 O 4 -tailored biochar composite for the simultaneous removal of bisphenol A and sulfamethoxazole.…”

Section: Organic Pollutants Removalmentioning

confidence: 99%

A Review of Non-Soil Biochar Applications

et al. 2020

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Biochar is the solid residue that is recovered after the thermal cracking of biomasses in an oxygen-free atmosphere. Biochar has been used for many years as a soil amendment and in general soil applications. Nonetheless, biochar is far more than a mere soil amendment. In this review, we report all the non-soil applications of biochar including environmental remediation, energy storage, composites, and catalyst production. We provide a general overview of the recent uses of biochar in material science, thus presenting this cheap and waste-derived material as a high value-added and carbonaceous source.

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Enhanced adsorption of bisphenol A and sulfamethoxazole by a novel magnetic CuZnFe2O4–biochar composite

Cited by 239 publications

References 47 publications

Magnetic biochar from alkali-activated rice straw for removal of rhodamine B from aqueous solution

Magnetic biochar from alkali-activated rice straw for removal of rhodamine B from aqueous solution

Activation of Persulfate by Biochars from Valorized Olive Stones for the Degradation of Sulfamethoxazole

A Review of Non-Soil Biochar Applications

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