Synthesis of novel magnesium ferrite (MgFe2O4)/biochar magnetic composites and its adsorption behavior for phosphate in aqueous solutions

Jung, Kyung Won; Lee, Soonjae; Lee, Young Jae

doi:10.1016/j.biortech.2017.09.035

Cited by 230 publications

(45 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Removal mechanisms of nZVI@biochar include reduction, surface complexation, and coprecipitation. Other magnetic mediums, such as spinel-type ferromagnets (MgFe 2 O 4 , MnFe 2 O 4 , and CoFe 2 O 4 ) (Chen et al 2019a, b, c, d;Fu et al 2019;Jung et al 2017;Wang et al 2015b) and alloys (CoPt 3 and FePt) (Wang et al 2014; Zhu et al 2009), when coated on biochar surface via different methods, can also endow biochar magnetism.…”

Section: Magnetic Biocharsmentioning

confidence: 99%

“…This characteristic potentially endows magnetic biochar to be directly used in pollutant removal from aqueous solution rather than worrying the leaching of biochar particles that may lead to secondary pollution (Li et al 2020;Yi et al 2020). A wide range of pollutants can be removed through sorption by magnetic biochar, such as inorganic anions (Chen et al 2011;Jung et al 2017), heavy metals (Cai et al 2019;Wang et al 2015c;Wu et al 2018;Yap et al 2017), and organic pollutants (Frohlich et al 2019;. What is more, the introduction of magnetic components (nZVI, nano-Fe 3 O 4 and -FeO) endows or enhances magnetic biochar with catalytic reduction activity for heavy metals (Liu et al 2019b;Zhong et al 2018) and degradation activity for organic contaminants (Chen et al 2017a;Cheng et al 2019;Fu et al 2019).…”

Section: Magnetic Biocharsmentioning

confidence: 99%

See 1 more Smart Citation

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Wang

et al. 2020

Biochar

136

View full text Add to dashboard Cite

The development of biochar has triggered a hot-spot in various research fields including agriculture, energy, environment, and materials. Biochar-based materials provide a novel approach against environmental challenging issues. Considering the rapid development of biochar materials, this review serves as a valuable platform to summarize the recent progress on the theoretical investigation and engineering applications of biochar materials in environmental remediation. For a better understanding of the structure-application relationships, the structural properties of biochar from macroscopic and microscopic aspects are summarized. The multilevel structures including elements, phases, surface chemistry, and molecular are highlighted to elucidate the multi-functional properties of biochars. Sorption, catalysis, redox reaction, and biological activity of biochar are briefly illustrated, which influence the transport, transformation, and removal of organic and inorganic pollutants in the environments. According to the multi-level structures and structure-application relationships of biochar, specific biocharbased materials and devices have been designed for practical environmental application. The important progress on the functionalization and device of biochar-based materials, including magnetic biochars, 2D and 3D biochar-based macrostructures, immobilized microorganism on biochar, and biochar-amended biofilters are highlighted. The environmental friendliness and sustainability of biochar-based materials, considering the whole cycle from synthesis to application, are evaluated.

show abstract

Section: Magnetic Biocharsmentioning

confidence: 99%

Section: Magnetic Biocharsmentioning

confidence: 99%

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Wang

et al. 2020

Biochar

136

View full text Add to dashboard Cite

show abstract

“…Phosphate is the important nutrient in the Earth's natural ecosystem. However, large amounts of phosphate in wastewater discharged into the environment are the main reason for eutrophication in aquatic environments, resulting in serious pollution and economic problems 1 . The source of phosphate pollution usually originates from a wide range of human activities such as agricultural runoff, domestic wastewater, and industrial discharge 2 .…”

mentioning

confidence: 99%

Phosphate Adsorption by Silver Nanoparticles-Loaded Activated Carbon derived from Tea Residue

Trinh

Nguyen

Van

et al. 2020

Sci Rep

133

View full text Add to dashboard Cite

Vu 6 , t. t. pham 7 , thi nu nguyen 8 , n. V. Quang 9 & X. c. nguyen 10,11* this study presents the removal of phosphate from aqueous solution using a new silver nanoparticlesloaded tea activated carbon (Agnps-tAc) material. in order to reduce costs, the tea activated carbon was produced from tea residue. Batch adsorption experiments were conducted to evaluate the effects of impregnation ratio of Agnps and tAc, pH solution, contact time, initial phosphate concentration and dose of Agnps-Ac on removing phosphate from aqueous solution. Results show that the best conditions for phosphate adsorption occurred at the impregnation ratio AgNPs/TAC of 3% w/w, pH 3, and contact time lasting 150 min. The maximum adsorption capacity of phosphate on AgNPs-TAC determined by the Langmuir model was 13.62 mg/g at an initial phosphate concentration of 30 mg/L. The adsorption isotherm of phosphate on AgNPs-TAC fits well with both the Langmuir and Sips models. The adsorption kinetics data were also described well by the pseudo-first-order and pseudo-secondorder models with high correlation coefficients of 0.978 and 0.966, respectively. The adsorption process was controlled by chemisorption through complexes and ligand exchange mechanisms. this study suggests that Agnps-tAc is a promising, low cost adsorbent for phosphate removal from aqueous solution.

show abstract

“…In general, values of ΔG o in the range of −20 to 0 kJ/mol represent physical adsorption, whereas values between −80 and −400 kJ/mol indicate chemical adsorption [46]. As shown in Table 5, the values of ΔG o determined in this work were −19.847, −19.642, −19.409, and −18.655 kJ/mol at 15,25,35, and 45 C, respectively, indicating that the adsorption of AO7 on MSS-AC was a thermodynamically spontaneous and feasible process at all investigated temperatures, and the adsorption mechanism is driven by electrostatic interactions and/or physical adsorption mediated by interactions such as van der Waals forces [47,48]. In addition, the more negative values of ΔG o at lower reaction temperatures are indicative of an exothermic adsorption process, which is also supported by the negative value of ΔH o (−26.337 kJ/mol) and confirmed by the fact that the adsorption capacity of MSS-AC decreased with increasing temperature.…”

Section: Effect Of Temperature: Adsorption Thermodynamics Studiesmentioning

confidence: 58%

Optimized preparation of activated carbon from municipal sewage sludge and application to the adsorption of azo dye from aqueous solutions

Jung

Lee

2018

Env Prog and Sustain Energy

Self Cite

View full text Add to dashboard Cite

In this study, the conditions for preparation of active carbon from municipal sewage sludge (MSS) were optimized from application to the efficient removal of the azo dye, Acid Orange 7 (AO7), from aqueous solutions. To maximize the adsorption capacity (response variable) of the MSS‐derived activated carbon (MSS‐AC), a 3 k Box–Behnken design based on response surface methodology was used to simultaneously optimize five important conditions (independent variables), that is, carbonizing temperature (400–600°C), carbonizing time (0.5–2.0 h), impregnation ratio (1.0–3.5 g KOH/g MSS), activating temperature (600–800°C), and activating time (0.5–2.0 h). The optimal conditions were established as carbonizing temperature: 509°C, carbonizing time: 1.25 h, impregnation ratio: 2.3 g KOH/g MSS, activating temperature: 681°C, and activating time: 1.21 h, with an overall desirability function of 0.991. Further, the effects of various key parameters (solution pH, ionic strength, adsorbent dosage, initial concentration, contact time, and temperature) on the adsorption of AO7 on the as‐synthesized MSS‐AC were elucidated through a series of batch experiments. Adsorption kinetics and isotherm studies revealed that the adsorption process is accurately described by the pseudo‐second order and Sips models. The theoretical maximum adsorption capacity of AO7 was found to be ~1410 mg/g at 25°C, which is superior to that of the other adsorbents reported to date. Additionally, the intraparticle diffusion model suggested that the adsorption was controlled by both external surface adsorption and intraparticle diffusion. Thermodynamic studies also suggested that the adsorption of AO7 by MASS‐AC is exothermic and is governed by physisorption. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S267–S276, 2019

show abstract

Synthesis of novel magnesium ferrite (MgFe2O4)/biochar magnetic composites and its adsorption behavior for phosphate in aqueous solutions

Cited by 230 publications

References 46 publications

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Phosphate Adsorption by Silver Nanoparticles-Loaded Activated Carbon derived from Tea Residue

Optimized preparation of activated carbon from municipal sewage sludge and application to the adsorption of azo dye from aqueous solutions

Contact Info

Product

Resources

About