Trace Metals in Biochars from Biodegradable By-products of Industrial Processes

Mancinelli, Enrico; Baltrėnaitė, Edita; Baltrėnas, Pranas; Paliulis, Dainius; Passerini, G.

doi:10.1007/s11270-016-2892-1

Cited by 20 publications

(6 citation statements)

References 56 publications

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“…DWdry weight. BCs at 450 and 700 °C from wood chips and lignin are BCWC450, BCWC700, BCLG450, and BCLG700, respectively testing DOC leaching behaviour because of the TC analysis results reported in a previous study by Mancinelli et al (2016). These authors measured the highest TC content in BCWC and BCLG for both the applied pyrolysis temperatures of 450 and 700 °C which were between 54 and 68%, respectively, higher than the content of TC in BCDSS.…”

Section: Results Of the Up-flow Percolation Test Methodsmentioning

confidence: 74%

“…To model trace metal (Cd, Cu, and Pb) speciation in the BC eluates. To the best of the authors' knowledge, few studies have assessed DOC content and composition of BC from lignin (Smith et al 2016) or trace metal concentration, leachability and bioavailability in BC from lignin (Mancinelli et al 2016). Hence, the need for investigating DOC content and leachability of BC and for modelling trace metal speciation in the BC eluates.…”

Section: Introductionmentioning

confidence: 99%

“…Values of total carbon (TC) concentration in the studied BCs were determined in a study byMancinelli et al (2016) BCs at 450 and 700 °C from wood chips, lignin and digested sewage sludge are BCWC450, BCWC700, BCLG450, BCLG700, BCDSS450, and BCDSS700, respectively DOC -dissolved organic carbon. DW -dry weight.…”

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confidence: 99%

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Dissolved Organic Carbon Content and Leachability of Biomass Waste Biochar for Trace Metal (Cd, Cu and Pb) Speciation Modelling

Mancinelli

Baltrėnaitė

Baltrėnas

et al. 2017

Journal of Environmental Engineering and Landscape Management

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Dissolved organic carbon (DOC) interacts with dissolved trace metal affecting their mobility and bioavailability through the formation of DOC–metal complexes. Several types of biochar (BC) produced from slow pyrolysis of wood chips (WC), lignin (LG), and digested sewage sludge at 450 and 700 °C were tested for DOC leaching via batch and up-flow percolation test methods. Trace metal (Cd, Cu, and Pb) speciation modelling in BC eluates was carried out combining measured data (i.e., DOC, ph, temperature, and dissolved trace metal concentrations) with data reported in the literature regarding fractions of DOC that are inert or active (i.e., fulvic acids (FA) and humic acids (HA)) in metal binding. BC from LG (BCLG) and WC (BCWC) at 700 °C released lower cumulative amounts of DOC compared with BC at 450 °C in the range 0.02–0.07% and 0.06–0.09% of total carbon content, respectively. For both pyrolysis temperatures, BCWC exhibited a higher tendency to release DOC compared to BCLG. Speciation modelling results showed the predominance of FA and HA complexes of Cd, Cu, and Pb in all the eluates from BCWC and BCLG irrespective of the inert fractions of DOC or the different fractions of active FA and HA considered.

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Section: Results Of the Up-flow Percolation Test Methodsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

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Dissolved Organic Carbon Content and Leachability of Biomass Waste Biochar for Trace Metal (Cd, Cu and Pb) Speciation Modelling

Mancinelli

Baltrėnaitė

Baltrėnas

et al. 2017

Journal of Environmental Engineering and Landscape Management

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“…In addition to Cd volatilisation at temperatures above 650°C, some volatilisation of Pb was also observed by Han et al (2017) at pyrolysis temperature above 850°C in a laboratoryscale sewage sludge pyrolysis unit, as PbO reacted with carbon-compounds to form volatile Pb compounds (similar to Equation 2.8). Similar findings were observed by Mancinelli et al (2016) and He et al (2010) about Pb volatilisation at higher temperatures.…”

Section: Effect Of Reactor Configuration and Temperaturesupporting

confidence: 89%

Valorisation of sewage sludge through pyrolysis : product properties and immobilisation of heavy metals

Udayanga¹

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“…As regards biochar production, a method described in the work by Mancinelli et al (2016) was followed. Air dried feedstock was placed in open crucibles, weighed, and wrapped in aluminium foil in order to create an oxygen-limited environment.…”

Section: Biochar Productionmentioning

confidence: 99%

Effect of Modification with FeCl3 and MgCl2 on Adsorption Characteristics of Woody Biochar

Chemerys

Baltrėnaitė²

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. Due to high specific surface area, well-developed porous structure and surface functionality biochar has a potential for being used as low-cost adsorbent for adsorption of organic and inorganic contaminants from aqueous solutions. Higher adsorption capacity and selectivity for metals could be further developed after modification of properties of biochar through physical ("designed biochar") and chemical ("engineered biochar") modification techniques. Wood waste of three types [aspen (Populus tremula L.), pine (Pinus sylvestris L.) and fir (Picea abies L.)] were selected to produce the biochar under slow pyrolysis conditions at 450 °C for 2 h with the heating rate of 10 °C/min. Mg and Fe-particles, acting as potential sorption sites for adsorption of metals, were added into the biochar through modification of the biochar with metal salts MgCl2 and FeCl3. The aim of the study was to investigate the effect of chemical modifications of woody biochar with MgCl2 and FeCl3 on the adsorption characteristics of the biochar. The engineered biochar with improved physico-chemical and sorptive properties was evaluated as potential adsorbent of metals from aqueous solutions. Such characteristics of the biochar, as density, porosity, pH, cation exchange capacity, electrical conductivity, moisture content, ash content, water holding capacity, total organic carbon were analyzed. Modifications followed by increasing of moisture and ash content. While carrying out the future adsorption experiment, significantly decreased pH and electrical conductivity of the engineered biochar should be taken into account. Increased cation exchange capacity of the engineered biochar promotes enhanced adsorption of metals.

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Trace Metals in Biochars from Biodegradable By-products of Industrial Processes

Cited by 20 publications

References 56 publications

Dissolved Organic Carbon Content and Leachability of Biomass Waste Biochar for Trace Metal (Cd, Cu and Pb) Speciation Modelling

Dissolved Organic Carbon Content and Leachability of Biomass Waste Biochar for Trace Metal (Cd, Cu and Pb) Speciation Modelling

Valorisation of sewage sludge through pyrolysis : product properties and immobilisation of heavy metals

Effect of Modification with FeCl3 and MgCl2 on Adsorption Characteristics of Woody Biochar

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