Biochar supported nanoscale zerovalent iron composite used as persulfate activator for removing trichloroethylene

Yan, Jingchun; Han, Lu; Gao, Weiguo; Xue, Shenghui; Chen, Mengfang

doi:10.1016/j.biortech.2014.10.103

Cited by 529 publications

(136 citation statements)

References 34 publications

(32 reference statements)

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“…Such pH-induced trend was also reported in reaction system of persulfate and magnetite nanoparticles [42]. One reasonable explanation is that the variations of solution pH changed the types and the amounts of active species in MS-Oxone systems [45], which had been confirmed by our EPR tests (see Figs. 6 and S13).…”

Section: Influence Of Solution Phsupporting

confidence: 67%

“…In detail, when 38.6 mM methanol or TBA were introduced BPB solutions, the removal rates were reduced by 15.14% and 17.67%, respectively, compared to the case without adding methanol or TBA. This relatively lower inhibition of methanol than TBA suggests that OH Å was formed in aquatic MS-Oxone system via the reaction of SO 4 ÅÀ with hydroxide at the solution pH of 6.5 [31,45,47]. Nevertheless, significant reduction of BPB removal was not observed when further increasing the concentrations of methanol or TBA.…”

Section: Influence Of Quenching Agentsmentioning

confidence: 86%

“…5(c), initial pH values of solutions ranging from acidic to moderately alkaline conditions generally exerted more favorable effect on BPB removal for MS-Oxone reaction systems than those of extremely alkaline ones. Different reasons were explored to explain the effects of the solution pH on persulfate-based oxidation systems [31,42,44,45]. For current reaction system, the role of electrostatic interactions between MS particles and BPB molecules could not explain such trend.…”

Section: Influence Of Solution Phmentioning

confidence: 99%

See 2 more Smart Citations

Synthetic conditions-regulated catalytic Oxone efficacy of MnO x /SBA-15 towards butyl paraben (BPB) removal under heterogeneous conditions

Yang

Lan

Lin

et al. 2016

Chemical Engineering Journal

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Section: Influence Of Solution Phsupporting

confidence: 67%

Section: Influence Of Quenching Agentsmentioning

confidence: 86%

Section: Influence Of Solution Phmentioning

confidence: 99%

See 1 more Smart Citation

Synthetic conditions-regulated catalytic Oxone efficacy of MnO x /SBA-15 towards butyl paraben (BPB) removal under heterogeneous conditions

Yang

Lan

Lin

et al. 2016

Chemical Engineering Journal

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“…The peaks of BC occurring at the wavenumbers of 3438 cm -1 and 1590 cm -1 corresponded to OH stretching vibration (Vuković et al 2010) and carbonyl/carboxyl C=O stretching vibration (Yan et al 2014), respectively. The peak at ~2790 cm -1 is connected with -CH 2 stretching vibration.…”

Section: Fourier Transform Infrared (Ftir) Analysismentioning

confidence: 99%

Effective Removal of Copper (II) and Cadmium (II) by Adsorbent Prepared from Chitosan-modified Magnetic Biochar

Song¹,

Yang²,

Cao³

2016

JRST

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A novel chitosan-modified magnetic biochar composite (CC-Fe) was synthesized by embedding Fe 2 O 3 and assembling chitosan in two-step. The properties of CC-Fe were characterized systematically by elemental analysis, Brunauer-Emmett-Teller (BET) surface area, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and batch sorption processes. The prepared adsorbent composite was comprised of magnetic particulates of Fe 2 O 3 and multifunctional group, and thus exhibited high sorption capability to remove copper (II) or cadmium (II) from waste water. For both copper (II) and cadmium (II), CC-Fe demonstrated a higher sorption capability (98% and 97%) than the non-chitosan magnetic biochar (11% and 7%). The sorption experimental results showed that the composite is a potential sorbent to remove copper (II) and cadmium (II). Due to its excellent magnetic characteristic, the heavy metal-laden CC-Fe could be isolated again from treated solution and reused after the desorption treatment. The functional groups of CC-Fe made efforts to the removal of heavy metals.

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“…They suggested that this integrated approach is highly effective for the removal of PCBs. In addition, the efficiency of rice-hull-biochar-supported nanoscale zerovalent iron (nZVI/biochar) with respect to the activation of PS for removing trichloroethylene (TCE) as the target pollutant from aqueous solutions has also been evaluated [24]. It was found that the rate of TCE degradation using the nZVI/biochar/PS technique was the highest for a reaction time of 5 min, pH of 6.2, and nZVI-to-biochar mass ratio of 1:5 in the aqueous stream.…”

Section: Introductionmentioning

confidence: 99%

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

et al. 2018

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Abstract:In this study, we investigated the ability of a magnetic wood biochar (WB)-based composite catalyst (Fe 3 O 4 -WB) to catalyze sodium persulfate (PS) for the remediation of estuary sediment contaminated with polycyclic aromatic hydrocarbons (PAHs). The effects of various critical parameters, including the catalyst dose and initial pH, were investigated. The degradation of the PAHs was found to be related to the number of rings in their structure. The results showed that Fe 3 O 4 -WB is an efficient catalyst for the removal of high-ring PAHs (HPAHs), with the highest degradation rates for the 6-, 5-, and 4-ringed PAHs being 90%, 84%, and 87%, respectively, for a PS concentration of 2 × 10 −5 M, catalyst concentration of 3.33 g/L, and pH of 3.0. That the reduction rate of the HPAHs was greater than that of the low-ring PAHs can be attributed to the strong affinity of the HPAHs for biochar derived from wood biomass. Overall, this study revealed that the WB-mediated electron transfer catalysis of the surface functional groups in a wide range of pH in the Fe 3 O 4 -WB/PS system and potentially application in the remediation of sediments contaminated with PAHs.

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Biochar supported nanoscale zerovalent iron composite used as persulfate activator for removing trichloroethylene

Cited by 529 publications

References 34 publications

Synthetic conditions-regulated catalytic Oxone efficacy of MnO x /SBA-15 towards butyl paraben (BPB) removal under heterogeneous conditions

Synthetic conditions-regulated catalytic Oxone efficacy of MnO x /SBA-15 towards butyl paraben (BPB) removal under heterogeneous conditions

Effective Removal of Copper (II) and Cadmium (II) by Adsorbent Prepared from Chitosan-modified Magnetic Biochar

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

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