Characteristics and mechanisms of hexavalent chromium removal by biochar from sugar beet tailing

Dong, Xueliang; Lena, Q.; Li, Yuncong

doi:10.1016/j.jhazmat.2011.04.008

Cited by 518 publications

(182 citation statements)

References 31 publications

(40 reference statements)

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“…For instance, Cr adsorption by seven sludge-derived biochars was pH-dependent at pH values of 2.0-5.0, with a maximum adsorption at pH 2.0 ). The pH-dependent Cr adsorption on biochar was also shown by others (Demirbas et al 2004;Dong et al 2011;Mohan et al 2011). Zhang et al (2013) also noted that the highest Pb adsorption on seven biochars occurred at pH 5.0, a value similar to that of our experiments (i.e., 4.5); moreover, these authors showed that Pb adsorption was stronger than that of Cr, by comparing the shape of the adsorption isotherms of Pb (at pH 5.0) and Cr (at pH 2.0).…”

Section: Adsorption Properties Of Biocharsupporting

confidence: 68%

Effect of pruning-derived biochar on heavy metals removal and water dynamics

et al. 2014

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Biomass-derived biochar is considered as a promising heavy metal adsorbent, due to abundance of polar functional groups, such as carboxylic, hydroxyl, and amino groups, which are available for heavy metal removal. The aims of this study were to evaluate the effectiveness of an orchard pruning-derived biochar in removing some heavy metals (through the evaluation of isotherms) and to study water dynamics at the solid-liquid interface as affected by heavy metal adsorption (through an innovative nuclear magnetic resonance (NMR) relaxometry approach). Both isotherms and NMR spectra revealed that Pb and Cr showed a good affinity for the biochar surface (Pb > Cr), while Cu was less affine. Accordingly, higher amounts of Pb and Cr were adsorbed by biochar as compared to those of Cu in the single systems. In binary systems (i.e., when two metals were applied simultaneously), Pb showed the highest inhibition of the adsorption of the other two metals, whereas the opposite was evidenced when Cu was used; the competitive adsorption was also strongly influenced by the metal residence time on biochar surface. In ternary systems (i.e., when all metals were applied simultaneously), even in the presence of high amounts of Pb and Cr, considerable adsorption of Cu occurred, indicating that some biochar adsorption sites were highly specific for a single metal.

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Section: Adsorption Properties Of Biocharsupporting

confidence: 68%

Effect of pruning-derived biochar on heavy metals removal and water dynamics

et al. 2014

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“…The chemical characteristics of individual feedstock and its biochar are always at significantly varying rate both spatially and temporarily [31]. It is indisputable that fixed carbon is the solid combustible residue that usually remains after a particle sample is carbonised and with volatile matter expelled [44]. Elemental ratios of oxygen/ carbon, oxygen/ hydrogen, and carbon/ hydrogen have been proven to be a reliable measure of both the extent of pyrolysis and level of oxidative adjustment of biochar in the solution systems [45,46].…”

Section: Physico-chemical Characterisation Of Biocharmentioning

confidence: 99%

Review of Eco-Friendly Biochar Used in the Removal of Trace Metals on Aqueous Phases

Duwiejuah¹,

Cobbina²,

Bakobie³

2017

IJEBB

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Eco-friendly biochar produced from cost-effective and readily available agricultural waste will likely pose no threat on the aqueous phases, other environmental media, human health and emission of greenhouse gases to the atmosphere. Optimising biochar for an intended application could require careful selection of a biomass feedstock as well as production pyrolysis technique and conditions for the production of biochars with specific characteristics. Previous studies have explores the relationships that exist between biochar production conditions, characteristics, and possible end-uses of biochar. This review provides an overview of the production and utilisation of biochar as absorbents for adsorption of trace metals in contaminated aqueous environment. Biochar has great affinity to adsorb molecular ions that is making it possible to be used for various toxicological remediation strategies. It has proven effective and useful for mitigating aqueous metals, organic compounds, suspended solids, and organic hydrocarbons in a various kind of industrial applications such as urban and residential storm water runoff, landfill leachates, industrial runoff, resource extraction runoff, and industrial wastewater filtration. Specifically designed biochar could be very effective in the removal of trace metals from contaminated aqueous environment. The multiple factors that determine the adsorption of the trace metals in aqueous environment or phases needs to be carefully examined. Cost-effectiveness of biomass feedstock and eco-friendliness of techniques need to also be given much consideration by way of making comparison with existing contaminant mitigation technologies. Keywords: aqueous phases, biochar, cost-effective, biomass feedstock, removal, trace metalsCite This Article: A. B. Duwiejuah, S.

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“…on the HAs, a small amount of positive charge occurred on the surface under acidic conditions in the form of protonated carboxylic, alcohol and hydroxyl groups (Dong et al 2011). Because positive and negative charges attract, an electrostatic interaction occurred potentially between the HAs and DBSA.…”

Section: Sorption Mechanism Of the Dbsa On Hasmentioning

confidence: 99%

Sorption behavior of dodecylbenzene sulfonic acid on humic acids from Mollisol and Alluvial soils

Zhao

Song³

et al. 2016

Environ Earth Sci

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Dodecylbenzene sulfonic acid (DBSA), the acid form of sodium dodecylbenzenesulfonate (SDBS), is often identified and detected in soils. However, it still has less awareness of the sorption behavior of DBSA with soil organic matter. In this paper, the sorption behaviors of DBSA on two different types of soils (Mollisol and Alluvial soils) and soil humic acids (HAs) were studied and compared, and the mechanisms of HAs and DBSA interactions were discussed. Sorption dynamics and isotherms were studied using the batch equilibrium method. The sorption kinetics was relatively slow, and the sorption equilibrium can be reached within 10 h. In the designed concentration range of DBSA in this work, the maximum DBSA sorption capacities on the Alluvial soil HA (AHA) and the Mollisol soil HA (MHA) were 115.0 and 112.2 mg/ g, respectively, which were higher than those of the Alluvial soil (AS) and Mollisol soil (MS). The sorption isotherms were well fitted by the Freundlich equation. The sorption capacity of the AHA was greater than that of the MHA, AS and MS. Furthermore, the sorption complexes of HAs and DBSA were characterized using elemental analysis, micro-Fourier transform infrared spectroscopy (FTIR), solid-state 13 C nuclear magnetic resonance (NMR) spectroscopy and electron spin resonance spectroscopy (ESR), it reveals that the sorption of DBSA on HAs mainly occurred on the C=O, C-O and aromatic functional groups. Moreover, the sorption data indicated that the sorption behavior was complicated, probably due to the formation of H bonds, hydrophobic interactions and electron donoracceptor mechanisms.

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Characteristics and mechanisms of hexavalent chromium removal by biochar from sugar beet tailing

Cited by 518 publications

References 31 publications

Effect of pruning-derived biochar on heavy metals removal and water dynamics

Effect of pruning-derived biochar on heavy metals removal and water dynamics

Review of Eco-Friendly Biochar Used in the Removal of Trace Metals on Aqueous Phases

Sorption behavior of dodecylbenzene sulfonic acid on humic acids from Mollisol and Alluvial soils

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