Adsorption of Cu(II) ions from aqueous solutions on biochars prepared from agricultural by-products

Pellera, Frantseska-Maria; Giannis, Apostolos; Kalderis, Dimitrios; Anastasiadou, Kalliopi; Stegmann, Rainer; Wang, Jing‐Yuan; Gidarakos, Evangelos

doi:10.1016/j.jenvman.2011.10.010

Cited by 309 publications

(144 citation statements)

References 26 publications

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“…Large amounts of Ni(II) and Co(II) were removed within 150 min; after that the capacity of adsorption remained constant (Kilik & Kirbiyik 2013). Pellera et al (2012) obtained similar results for Cu(II): the required time to reach equilibrium was 2 hours. How to prepare 'engineered' biochar?…”

Section: Modification Methods For Lignocellulosic Biochar Towards Enhsupporting

confidence: 64%

“…Chen et al (2011) observed the highest metal sorption efficiencies for both hardwood and corn strawderived biochar 1 g/L, while the increase in the concentration of biochar decreased the adsorption efficiencies owing to the increase in the total number of active sites. The optimum Cu (II) adsorption conditions were found to occur at 5-12 g/L of adsorbent dose (Pellera et al, 2012). Highly alkaline biochar could increase pH of treating water above the limits (according to international standards, pH of treated effluent water (including storm water run-off) should be within the limits of 6.5 -8.5).…”

Section: Modification Methods For Lignocellulosic Biochar Towards Enhmentioning

confidence: 95%

“…The value of pH should be regulated according to the potential adsorbent, e.g. the highest adsorption of Ni(II) and Co(II) was observed at pH=7 (Kilik & Kirbiyik, 2013), for Cu (II) at pH=5-6 (Pellera et al, 2012). Large amounts of Ni(II) and Co(II) were removed within 150 min; after that the capacity of adsorption remained constant (Kilik & Kirbiyik 2013).…”

Section: Modification Methods For Lignocellulosic Biochar Towards Enhmentioning

confidence: 99%

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A review of lignocellulosic biochar modification towards enhanced biochar selectivity and adsorption capacity of potentially toxic elements

Chemerys¹,

Baltrėnaitė²

2018

Ukr J Ecol

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Biochar, which is rich in aromatic carbon and minerals, is a product of biomass pyrolysis at temperatures ranging from 350°C to 1000°C in oxygen-limited environments. In recent years biochar has generated much interest in the field of water treatment in view of low production costs, availability of the feedstock (e.g. lignocellulosic biomass waste) and adsorptive properties. This review incorporates researches on artificial and natural modifications of biochar towards adsorption of potentially toxic elements on biochar. The aim of this study was to provide a comprehensive review of recent research findings and theory developments on the existing modifications of biochar for adsorption of potentially toxic elements (i.e. inorganic compounds) from aqueous solutions. Factors affecting adsorption of potentially toxic elements by lignocellulosic biochar and modification techniques for lignocellulosic biochar towards enhanced adsorption of potentially toxic elements were analyzed. The novelty of this study is discussion of the natural modifications of biochar and smart properties of biochar towards adsorption of potentially toxic elements. Recommendations are offered for modifying the lignocellulosic biochar to produce designed, engineered or smart biochar with high adsorption capacity for potentially toxic elements. Key words: engineered biochar; adsorption; lignocellulosic biomass; pyrolysis IntroductionAccording to European Biochar Certificate 2015, biochar 'is a heterogeneous substance rich in aromatic carbon and minerals. It is produced by pyrolysis of the sustainably obtained biomass under controlled conditions with clean technology and is used for any purpose that does not involve its rapid mineralization to CO2 and may eventually become a soil amendment'. At the beginning of biochar research, it aroused much interest as a soil amendment because of its potential for carbon sequestration and soil quality improvement. After physical, chemical and biological properties of biochar (Sun et al., 2014) and production technologies (Nartey and Zhao, 2014) were investigated, biochar research shifted from soil improvement to application in health sciences and engineering. Biochar could be a new low-cost adsorbent for removal of inorganic compounds (e.g. potentially toxic elements). It can be produced from wastes (e.g. lignocellulosic biomass) and is cheaper than activated carbon because it is produced through single-stage pyrolysis at 350-1000 °C and does not need additional costs in the activation process. Activation is the second stage in the production of activated carbon and occurs in the temperature range of 600-1200 °C in the presence of oxidizing gas, e.g. CO2 or steam, which results in the formation of a well-developed micropore structure. Therefore, biochar requires less energy for production than activated carbon (Azargohar and Dalai, 2006) and can be used as an alternative adsorbent to remove potentially toxic elements (PTE) from water solutions and air (Baltrėnaitė et al., 2016a). It demonstrated the ability ...

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Section: Modification Methods For Lignocellulosic Biochar Towards Enhsupporting

confidence: 64%

Section: Modification Methods For Lignocellulosic Biochar Towards Enhmentioning

confidence: 95%

Section: Modification Methods For Lignocellulosic Biochar Towards Enhmentioning

confidence: 99%

See 1 more Smart Citation

A review of lignocellulosic biochar modification towards enhanced biochar selectivity and adsorption capacity of potentially toxic elements

Chemerys¹,

Baltrėnaitė²

2018

Ukr J Ecol

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“…It can be seen from Figure 2 that the adsorption amount of Ni 2+ increased as pH increased from 2 to 6. This can be attributed to the effect of pH on affinity between adsorbent (biochar) and adsorbate (metal ion solution) and the speciation of metals and dissociation of active functional sites on the adsorbent [15]. At low pH, the surface functional groups (mainly oxygen-containing groups) linked to the H + ion making competition between Ni 2+ ions and H + ions which resulted in a lower electrostatic repulsion [16].…”

Section: Effect Of Solution Ph On Ni 2+ Adsorptionmentioning

confidence: 99%

Date seed derived biochar for Ni(II) removal from aqueous solutions

2017

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Abstract. The purpose of this study was to investigate the adsorption characteristic of biochars derived from date seed for Ni 2+ ions removal from aqueous solutions. Two biochars were prepared by slow pyrolysis of date seed for 3 h at 450 °C (DSB450) and 550 °C (DSB550). The adsorption of Ni 2+ was carried out by batch experiments at room temperature. The effects of pyrolysis temperature, contact time, initial metal concentration, and solution pH were investigated. The results showed that biochar prepared at higher temperature (DSB550) had higher adsorption capacity of Ni 2+ from aqueous solution than biochar prepared at lower temperature (DBS450). Adsorption efficiency of Ni 2+ ions was pH dependent and the maximum adsorption was found to occur at pH around 6.0. To describe the equilibrium isotherms, the experimental results were analyzed by the Langmuir, and Freundlich isotherms. The adsorption isotherm for Ni 2+ by DSB550 was best fit to Langmuir isotherm with (R 2 = 0.94). The maximum adsorption capacity of Ni 2+ of DSB550 biochar was 0.609 mmol g í1 . Pseudo-first order, pseudo-second order, and intraparticle diffusion models were used to model the kinetic parameters and mechanism of adsorption process. The results showed that the adsorption kinetics of these biochars are well described by a pseudo-second order kinetic model with correlation coefficient (R 2 = 0.99). The results of the study indicated that biochar derived from date seed biomass is a suitable material for adsorption of Ni 2+ ion from aqueous solution.

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“…Pellera et al [41] also reported biochar yields of rice husk and compost derived after hydrothermal pyrolysis of about 62.5%, and olive pomace and organic waste at a quite lower of 37.5%. This revealed that the increase in pyrolytic temperature led to a decrease in the yield for all produced materials through the pyrolysis.…”

Section: Production Of Biochar For Adsorptionmentioning

confidence: 97%

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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Adsorption of Cu(II) ions from aqueous solutions on biochars prepared from agricultural by-products

Cited by 309 publications

References 26 publications

A review of lignocellulosic biochar modification towards enhanced biochar selectivity and adsorption capacity of potentially toxic elements

A review of lignocellulosic biochar modification towards enhanced biochar selectivity and adsorption capacity of potentially toxic elements

Date seed derived biochar for Ni(II) removal from aqueous solutions

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

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