Immobilization and bioavailability of heavy metals in greenhouse soils amended with rice straw-derived biochar

Zhang, Runhua; Li, Zhiguo; Liu, Xudong; Bincai, Wang; Zhou, Guolin; Huang, Xiaoqiao; Lin, Chufa; Wang, Aihua; Brooks, Margot

doi:10.1016/j.ecoleng.2016.10.057

Cited by 197 publications

(49 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This indicated low CEC values of these two studied biochars. Normally biochars are considered to develop more oxygen-containing functional groups (Bruun et al, 2011;Manyà, 2012) and hence increased CEC and negative charge of soils (Lehmann, 2007a;Maia et al, 2011;Mohamed et al, 2015;Zhang et al, 2017). Our study, however, suggested the increase of soil functional groups caused by biochars was not significant enough to change soil surface charge.…”

Section: Surface Charges Of Soilscontrasting

confidence: 52%

See 1 more Smart Citation

Effects of acidic and neutral biochars on properties and cadmium retention of soils

Dong

Lamb

et al. 2017

Chemosphere

View full text Add to dashboard Cite

In this study, an acidic biochar and a neutral biochar were applied at 5 wt% into two soils for an 11-month incubation experiment. One Ferrosol soil (Ba) was slightly acidic with low organic matter and the other Dermosol soil (Mt) was slightly alkaline with high organic matter. The acidic (pH = 3.25) wood shaving (WS) biochar had no marked impact on nutrient levels, cation exchange capacity (CEC), pH and acid neutralization capacity (ANC) of either soil. By contrast, the neutral (pH = 7.00) chicken litter (CL) biochar significantly increased major soluble nutrients, pH, ANC of soil Ba. In terms of C storage, 87.9% and 69.5% WS biochar-C can be sequestrated as TOC by soil Ba and Mt, respectively, whereas only 24.0% of CL biochar-C stored in soil Ba and negligible amount in Mt as TOC. Biochars did not have significant effects on soil sorption capacity and sorption reversibility except that CL biochar increased sorption of soil Ba by around 25.4% and decreased desorption by around 50.0%. Overall, the studied acidic C rich WS biochar held little agricultural or remedial values but was favourable for C sequestration. The neutral mineral rich CL biochar may provide short-term agricultural benefit and certain sorption capacities of lower sorption capacity soils, but may be unlikely to result in heightened C sequestration in soils. This is the first study comprehensively examining functions of acidic and neutral biochars for their benefits as a soil amendment and suggests the importance of pre-testing biochars for target purposes prior to their large scale production.

show abstract

Section: Surface Charges Of Soilscontrasting

confidence: 52%

“…Biochars produced under low pyrolysis temperatures can be acidic (Novak et al, 2009;Hagner et al, 2016;Zhang et al, 2017). For example, birch (Betula spp.)…”

Section: Introductionmentioning

confidence: 99%

Effects of acidic and neutral biochars on properties and cadmium retention of soils

Dong

Lamb

et al. 2017

Chemosphere

View full text Add to dashboard Cite

show abstract

“…Several related studies have also shown that, under enhanced organic matter, more stable metal fractions could form Bian et al, 2013;Ok et al, 2011). However, while the results indicate that biochar may be able to stabilize metals in contaminated sediments under certain conditions as clear decreases in C p and C DGT and clear increases in F3 and F4 in this study, it is clear that biochar is not as effective as phosphate or iron-bearing materials, the removals and transformations reported in other related studies are much higher than those reported in this and other biochar-related studies (Zhang et al, 2017;Igalavithana et al, 2017;Lu et al, 2017). For example, when phosphate compounds were added to contaminated soils, the concentrations of extractable heavy metals decreased by more than 90% (Ahn et al, 2015;Sima et al, 2015), while the oxidizable and residual phases of Pb and Cu increased by between 70%…”

Section: Possible Mechanisms Of Stabilization Induced By Biocharcontrasting

confidence: 80%

Assessing the capacity of biochar to stabilize copper and lead in contaminated sediments using chemical and extraction methods

Wang

Ren

Wang

et al. 2019

Journal of Environmental Sciences

View full text Add to dashboard Cite

“…Currently, it is mainly used as a soil improver; however, its adsorbent properties suggest it could also be used for metal sequestering, thus reducing mobility and danger. For instance, it has been demonstrated that by applying biochar to soil, pH can be effectively modified and metal solubilization prevented [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Application of Biochar to the Remediation of Pb-Contaminated Solutions

2018

View full text Add to dashboard Cite

BIOTON® biochar, produced by a wood biomass pyrolysis process, which is usually applied as soil amendment, was investigated for a novel application, i.e., the adsorption of lead from contaminated solutions. The experimental activity included physical and chemical characterization of BIOTON®; and Scanning Electron Microscope (SEM) images to highlight its internal structure. The adsorption process was investigated through batch and column experiments. Adsorption kinetics showed very rapid achievement of equilibrium conditions, i.e., 50 mg/L and 100 mg/L initial Pb concentration at 2 h and 4 h, respectively. Complete removal also occurred within the same time. The Brunauer–Emmett–Teller model was a better fit for the equilibrium data of both Pb concentrations, whereas the kinetics were best represented by the pseudo second-order model. Column tests showed that the addition of biochar as an adsorbent media within the bed significantly extended the time of breakthrough and exhaustion, with respect to the column filled with soil only. The values found for the adsorption capacity of BIOTON®- versus lead-containing solutions were comparable to those reported for commercial adsorbents. Therefore, BIOTON® can be considered a valid option: It also offers the additional benefit of allowing the recovery of a residue, which alternately would need to be disposed of.

show abstract

Immobilization and bioavailability of heavy metals in greenhouse soils amended with rice straw-derived biochar

Cited by 197 publications

References 37 publications

Effects of acidic and neutral biochars on properties and cadmium retention of soils

Effects of acidic and neutral biochars on properties and cadmium retention of soils

Assessing the capacity of biochar to stabilize copper and lead in contaminated sediments using chemical and extraction methods

Application of Biochar to the Remediation of Pb-Contaminated Solutions

Contact Info

Product

Resources

About