Efficacy of woody biomass and biochar for alleviating heavy metal bioavailability in serpentine soil

Bandara, Tharanga; Herath, Indika; Kumarathilaka, Prasanna; Hseu, Zeng Yei; Ok, Yong Sik; Vithanage, Meththika

doi:10.1007/s10653-016-9842-0

Cited by 72 publications

(35 citation statements)

References 49 publications

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“…The decrease in the yield at high pyrolysis temperatures could be ascribed to the loss of volatile components, and the high ash content of the biochar indicates the accumulation of inorganic minerals, which could raise the pH and CEC 20,21 . Previous studies have shown that a high pH value for biochar may result from the release of alkali salts and the loss of acidic functional groups 22 . The elemental composition of PC and SC is shown in Table 1; very small amounts (≤0.20%) of other elements (e.g., S, Ca, Mn, Ag, Cr, and Cd) were detected, and the contents of these elements are not given in the table.…”

Section: Resultsmentioning

confidence: 99%

Adsorption characteristics of Pb(II) using biochar derived from spent mushroom substrate

Yang²,

et al. 2019

Sci Rep

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As a multifunctional material, biochar is considered a potential adsorbent for removing heavy metals from wastewater. Most biochars with high adsorption capacities have been modified, but this modification is uneconomical, and modifying biochar may cause secondary pollution. Thus, it is necessary to develop an efficient biochar without modification. In this study, spent P. ostreatus substrate and spent shiitake substrate were used as the raw materials to prepare biochar. Then, the physicochemical properties of the biochars and their removal efficiencies for Pb(II) were investigated. The results showed that the physicochemical properties (e.g., large BET surface area, small pore structure and abundant functional groups) contributed to the large adsorption capacity for Pb(II); the maximum adsorption capacities were 326 mg g−1 (spent P. ostreatus substrate-derived biochar) and 398 mg g−1 (spent shiitake substrate-derived biochar), which are 1.6–10 times larger than those of other modified biochars. The Pb(II) adsorption data could be well described by the pseudo-second-order kinetic model and the Langmuir model. This study provides a new method to comprehensively utilize spent mushroom substrates for the sustainable development of the edible mushroom industry.

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Section: Resultsmentioning

confidence: 99%

Adsorption characteristics of Pb(II) using biochar derived from spent mushroom substrate

Yang²,

et al. 2019

Sci Rep

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“…Biochar amendments onto contaminated soils would greatly reduce the total metal concentration and bioavailability fraction [23][24][25][26]. For instance, Ahmad et al [27] found that soybean stover-derived BC more efficiently immobilized Pb (88%) and Cu (87%) in shooting range soil in Cheorwon-gun in Gangwon-do, Korea.…”

Section: Introductionmentioning

confidence: 99%

Influence of Gliricidia sepium Biochar on Attenuate Perchlorate-Induced Heavy Metal Release in Serpentine Soil

Kumarathilaka

Vithanage

2017

Journal of Chemistry

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Perchlorate (ClO4-) is a strong oxidizer, capable of accelerating heavy metal release into regolith/soil. Here, we assessed interactions between ClO4- and serpentine soil to simulate and understand the fate of Ni and Mn and their immobilization with the presence of biochar (BC). A soil incubation study (6 months) was performed using serpentine soil in combination with different ClO4- concentrations (0.25, 0.5, 0.75, and 1 wt.%) and three different amendment rates (1, 2.5, and 5 wt.%) of Gliricidia sepium BC. Bioavailable fraction of Ni and Mn was analyzed using CaCl2 extraction method. An increase of ClO4- concentrations enhanced bioavailability fraction of Ni and Mn. However, BC amendments reduced the bioavailability of Ni and Mn. In comparison, 5% BC amendment significantly immobilized the bioavailability of Ni (68–92%) and Mn (76–93%) compared to other BC amendment rates. Electrostatic attractions and surface diffusion could be postulated for Ni and Mn immobilization by BC. In addition, ClO4- may have adsorbed to BC via hydrogen bonding which may reduce the influence of ClO4- on Ni and Mn mobility. Overall, it is obvious that BC could be utilized as an effective amendment to immobilize Ni and Mn in heavy metal and ClO4- contaminated soil.

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“…Instead, biochars are recalcitrant from degradation (Cernansky, 2015 ) and characterized with lower labile C fractions (Zimmerman et al, 2011) and rich functional groups for metal retention (Dong et al, 2014). For example, biochars are able to immobilize nickel, chromium, and Mn in heavy metal contaminated serpentine soil (Bandara et al, 2016). On other hand, the metal compounds in the biomass can be converted to their more stable forms.…”

Section: A Practical Solution To Disposal Of Heavy Metal Hyper-accumumentioning

confidence: 99%

Biochar provides a safe and value-added solution for hyperaccumulating plant disposal: A case study of Phytolacca acinosa Roxb. (Phytolaccaceae)

Wang

Gao

et al. 2017

Chemosphere

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In this work, an innovative approach using biochar technology for hyperaccumulator disposal was developed and evaluated. The heavy metal enriched P. acinosa biomass (PBM) was pyrolyzed to produce biochar (PBC). Both PBM and PBC were characterized with X-ray diffraction (XRD) for crystal phases, scanning electron microscopy (SEM) for surface topography, and analyzed for elemental composition and mobility. The results revealed that whewellite, a dominant crystal form in biomass, was decomposed to calcite after pyrolysis. Elemental analysis indicated that 91-99% total non-volatile elements in the biomass were retained in the biochar. The toxicity characteristic leaching procedure (TCLP) results revealed that 94.6% and 0.15% of total Mn was extracted for biomass and biochar, respectively. This suggests that mobility and bioavailability of Mn in biochar was much lower relative to pristine biomass. Batch sorption experiment showed that excellent removal of aqueous silver, lead, cadmium, and copper ions can be achieved with PBC. Findings from this work indicated that biochar technology can provide a value-added solution for hyperaccumulator disposal.

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Efficacy of woody biomass and biochar for alleviating heavy metal bioavailability in serpentine soil

Cited by 72 publications

References 49 publications

Adsorption characteristics of Pb(II) using biochar derived from spent mushroom substrate

Adsorption characteristics of Pb(II) using biochar derived from spent mushroom substrate

Influence of Gliricidia sepium Biochar on Attenuate Perchlorate-Induced Heavy Metal Release in Serpentine Soil

Biochar provides a safe and value-added solution for hyperaccumulating plant disposal: A case study of Phytolacca acinosa Roxb. (Phytolaccaceae)

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