Mechanism of glyphosate removal by biochar supported nano-zero-valent iron in aqueous solutions

Jiang, Xianying; Ouyang, Zhuozhi; Zhang, Zhengfang; Yang, Chen; Li, Xiaoqin; Dang, Zhi; Wu, Pingxiao

doi:10.1016/j.colsurfa.2018.03.041

Cited by 103 publications

(32 citation statements)

References 43 publications

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“…Previous studies in the literature have investigated glyphosate adsorption of various adsorbent doses. A comparison of the results is presented in Table 6, which shows high adsorbent capacity for resin D301 (Chen et al 2016), Zr-MOF (Yang et al 2018), biochar-supported nano-zerovalent iron (Jiang et al 2018), MnFe 2 O 4 -graphene hybrid composite (Yamaguchi et al 2016), forest soil (Sen et al 2017), rice husk char (Herath et al 2016), woody biochar (Mayakaduwa et al 2016), palm oil frond-activated carbon (Salman and Abid 2013), alum sludge in liquid form (LAS) (Hu et al 2011), and dewatered alum sludge (DAS) (Hu et al 2011). The adsorption capacity for glyphosate, in descending order, is as follows: resin D301 > Zr-MOF > MnFe 2 O 4 -graphene hybrid composite > forest soil > rice husk char > LAS > palm oil fronds > activated carbon > DAS > EBAC > biochar-supported nano-zerovalent iron > woody biochar.…”

Section: Comparison Of Current Study With Previously Published Reportsmentioning

confidence: 99%

“…Glyphosate has different functional groups, giving rise to donor groups including phosphonate, amino, and hydroxyl in aqueous medium, which can bind to the adsorbent surface during the adsorption process (Jensen et al 2009). Previous studies have investigated glyphosate adsorption by various materials, including waste residue (Hu et al 2011), woody char (Mayakaduwa et al 2016), resin (Chen et al 2016), MnFe 2 O 4 -graphene hybrid composite (Yamaguchi et al 2016), biochar-supported zerovalent iron (Jiang et al 2018), Zr-MOF (Yang et al 2018), graphene oxide/TiO 2 nanocomposite (Hosseini and Toosi 2019), and forest soil (Sen et al 2017). However, no studies have investigated eucalyptus bark char for glyphosate separation.…”

Section: Introductionmentioning

confidence: 99%

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Glyphosate adsorption by Eucalyptus camaldulensis bark-mediated char and optimization through response surface modeling

2019

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In this study, orthophosphoric acid-modified activated char was prepared from Eucalyptus camaldulensis bark (EBAC), and used for removing traces of [N-(phosphonomethyl)glycine] (glyphosate) herbicide from aqueous solution. The adsorption capacity was characterized by zero-point-charge pH, surface analysis, and Fourier transform infrared spectroscopy. Batch mode experiments were conducted to observe the effects of selected variables, namely dose, contact time, pH, temperature, and initial concentration, on adsorption capacity. Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm models were generated to describe the mechanisms involved in the multilayer adsorption process. The results show that high temperature enhanced the adsorption capacity of EBAC, with a temperature of 373 K yielding adsorption capacity (q max) and Freundlich parameter (K F) of 66.76 mg g −1 and 9.64 (mg g −1) (L mg −1) −n , respectively. The thermodynamics study revealed entropy and enthalpy of −5281.3 J mol −1 and −20.416 J mol −1 , respectively. Finally, glyphosate adsorption was optimized by the Box-Behnken model, and optimal conditions were recorded as initial concentration of 20.28 mg L −1 , pH 10.18, adsorbent dose of 199.92 mg/50 mL, temperature of 303.23 K, and contact time of 78.42 min, with removal efficiency of 98%. Therefore, it can be suggested that EBAC could be used as an efficient, low-cost adsorbent for removal of glyphosate from aqueous solutions.

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Section: Comparison Of Current Study With Previously Published Reportsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Glyphosate adsorption by Eucalyptus camaldulensis bark-mediated char and optimization through response surface modeling

2019

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“…All the results were obtained by taking an average of three specimens. The equilibrium adsorption capacity of Cu(II) (q e ) was calculated using eqn (2):…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Pyrolytic behavior of a zero-valent iron biochar composite and its Cu(ii) removal mechanism

Zhang

Dong

et al. 2018

RSC Adv.

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“…Among these methods, adsorption technology is particularly attractive, owing to its high efficiency, easy operation and low‐cost features. To date, adsorbents such as activated carbon, goethite, water industrial residue, magnetic MnFe 2 O 4 ‐graphene, resin and chemical modified biochar (BC), have been used for the removal of aqueous glyphosate. Derived from the hydrolysis of plant biomass, BC is considered to be a promising adsorbent support for large‐scale adsorption applications, as a result of its economical, well‐developed porosity paired with rich surface functional group properties …”

Section: Introductionmentioning

confidence: 99%

Effective removal of aqueous glyphosate using CuFe₂O₄@biochar derived from phragmites

Jia

Liu

Xia

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The excess use of glyphosate in both agricultural and nonagricultural areas has led to tremendous health (e.g. cardiac and respiratory impacts) and environmental concerns worldwide. There is an urgent need to find efficient ways to remove glyphosate residue from the aqueous environment. RESULTS: Herein, an effective method for the removal of aqueous glyphosate is developed by employing nano-CuFe 2 O 4 modified biochar (BC) as an adsorbent. The CuFe 2 O 4 @BC adsorbents were prepared through hydrolyzing phragmite powders at 500 ∘ C, followed by a simple coprecipitation method. The influence of initial glyphosate concentration, temperature, pH, time and coexisting species on the adsorption behavior of CuFe 2 O 4 @BC to glyphosate were fully examined. CONCLUSION: It was found that the adsorption of glyphosate onto CuFe 2 O 4 @BC is highly dependent on the initial glyphosate concentration, pH and temperature, as well as coexisting species. The Freundlich and Langmuir models fitted the equilibrium isotherm data well, indicating the presence of both physisorption and chemisorption. In addition, the adsorption kinetic is well described by the pseudo-second-order kinetic model, which indicated that chemical adsorption may dominate the adsorption process. The CuFe 2 O 4 @BC adsorption of glyphosate presented a maximum adsorption capacity of 269.4 mg g −1 within 240 min, under 600 mg L −1 of glyphosate solution at 298 K and pH 4; this performance exceeds all other biochar-derived adsorbents for the removal of aqueous glyphosate encountered in the open literature. Such a cost-effective, high-performance adsorbent shows a great potential for the removal of aqueous glyphosate in industry. Regeneration testThe CuFe 2 O 4 @BC adsorbents were regenerated via a NaOH (0.5 mol L -1 ) rinsing method: they were collected via filtration and J Chem Technol Biotechnol 2020; 95: [196][197][198][199][200][201][202][203][204]

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Mechanism of glyphosate removal by biochar supported nano-zero-valent iron in aqueous solutions

Cited by 103 publications

References 43 publications

Glyphosate adsorption by Eucalyptus camaldulensis bark-mediated char and optimization through response surface modeling

Glyphosate adsorption by Eucalyptus camaldulensis bark-mediated char and optimization through response surface modeling

Pyrolytic behavior of a zero-valent iron biochar composite and its Cu(ii) removal mechanism

Effective removal of aqueous glyphosate using CuFe₂O₄@biochar derived from phragmites

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Mechanism of glyphosate removal by biochar supported nano-zero-valent iron in aqueous solutions

Cited by 103 publications

References 43 publications

Glyphosate adsorption by Eucalyptus camaldulensis bark-mediated char and optimization through response surface modeling

Glyphosate adsorption by Eucalyptus camaldulensis bark-mediated char and optimization through response surface modeling

Pyrolytic behavior of a zero-valent iron biochar composite and its Cu(ii) removal mechanism

Effective removal of aqueous glyphosate using CuFe2O4@biochar derived from phragmites

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Effective removal of aqueous glyphosate using CuFe₂O₄@biochar derived from phragmites