Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review

Wang, Jie; Shi, Liang; Zhai, Limin; Zhang, Haowen; Wang, Shengxiao; Zou, Jianwen; Shen, Zhenguo; Lian, Chunlan; Chen, Yahua

doi:10.1016/j.ecoenv.2020.111261

Cited by 170 publications

(47 citation statements)

References 134 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recent biochar studies describe primarily two methods of adsorption by biochar (He et al 2019a, b), firstly, by direct adsorption and secondly, by improving the soil's physicochemical properties (such as pH, CEC, mineral, and OM content) (Wang et al 2021). The mechanisms involved in controlling the removal of HMs from contaminated soils by direct adsorption of biochar includes physical sorption, ion exchange, electrostatic interaction, precipitation, and complexation (Inyang et al 2016).…”

Section: Improvement Of Biochar's Efficacy For Heavy Metal Remediationmentioning

confidence: 99%

“…Moreover, the soil type, biochar amendment rate and its placement in the soil controls the overall efficacy of biochar for HM remediation (O'Connor et al 2018b, Guo et al 2020). Biochar's preparation condition also influence its physicochemical properties, which indirectly also control its HM immobilisation effects (Wang et al 2021). The production parameters that were found to control these biochar properties include, pyrolysis temperature, heating rates, vapour residence time, biomass type and particle size (Sakhiya et al 2020).…”

Section: Improvement Of Biochar's Efficacy For Heavy Metal Remediationmentioning

confidence: 99%

See 1 more Smart Citation

Biochar remediation of soil: linking biochar production with function in heavy metal contaminated soils

Taraqqi-A-Kamal¹,

Atkinson²,

Khan³

et al. 2021

Plant Soil Environ.

View full text Add to dashboard Cite

The focus of this study is on the soil physicochemical, biological, and microbiological processes altered by biochar application to heavy metal (HM) contaminated soils. The aim is to highlight agronomical and environmental issues by which the restorative capacity of biochar might be developed. Literature shows biochar can induce soil remediation, however, it is unclear how soil processes are linked mechanistically to biochar production and if these processes can be manipulated to enhance soil remediation. The literature often fails to contribute to an improved understanding of the mechanisms by which biochar alters soil function. It is clear that factors such as biochar feedstock, pyrolysis conditions, application rate, and soil type are determinants in biochar soil functionality. These factors are developed to enhance our insight into production routes and the benefits of biochar in HM soil remediation. Despite a large number of studies of biochar in soils, there is little understanding of long-term effects, this is particularly true with respect to the use and need for reapplication in soil remediation.

show abstract

Section: Improvement Of Biochar's Efficacy For Heavy Metal Remediationmentioning

confidence: 99%

Section: Improvement Of Biochar's Efficacy For Heavy Metal Remediationmentioning

confidence: 99%

Biochar remediation of soil: linking biochar production with function in heavy metal contaminated soils

Taraqqi-A-Kamal¹,

Atkinson²,

Khan³

et al. 2021

Plant Soil Environ.

View full text Add to dashboard Cite

show abstract

“…Biochar is one of the three products, together with oil and gas, of the pyrolysis of biomass. It is a porous material, characterized by high carbon content, generally above 60%, an elevated surface area, an alkaline pH, a high cation exchange capacity and the presence of negatively charged functional groups on its surface [ 4 , 10 , 11 ]. Due to such properties, biochar has been shown to improve soil conditions, i.e., reduce soil acidity, increase nutrient and organic matter contents, as well as to immobilize metal(loid)s [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

The Potential of Clover Green Amendment, Associated with Biochar, Activated Carbon or Ochre, for the Phytoremediation, Using Populus x. canescens, of a Former Mine Technosol

Lebrun

Bourgerie

Morabito

2021

Plants

View full text Add to dashboard Cite

Metal(loid) soil pollution resulting from past and present mine activities is a serious environmental and health issues worldwide. Therefore, the remediation of those polluted areas has been a growing research interest over the last decades, especially the assisted phytoremediation. In this study, a pot experiment was set up, using a former mine technosol, highly polluted by As and Pb, to which biochar, activated carbon, or ochre was applied, alone or in combination to clover green amendment. Following amendment application, Populus x. canescens cuttings were planted. Results showed that all four amendments reduced soil acidity. However only the first three amendments immobilized As and Pb, while the green amendment drastically mobilized those two pollutants and none of the amendments improved plant growth. In conclusion, the association of clover green amendment to biochar, activated carbon, or ochre did not appear as an efficient remediation strategy in this case; although the aging of the amendments and degradation of the green amendment in the soil with time could have positive outcomes.

show abstract

“…The remediation of polluted soils and water was and still one of the critical environmental issues, which means the removal of pollutants from soil and water using different strategies such as fungi ormyco-remediation (Butu et al 2020), the cultivated plants by phytoremediation (Khan et al 2020), earthworms or vermi-remediation (Karimi et al 2020;Lacalle et al 2020;Zeb et al 2020), or soil micro-organisms by bioremediation (Kalsi et al 2020), or by using some biosorbent materials like biochar (Wang et al 2021), fly ash and organic fertilizers (Hu et al 2020), humic substances (Dong et al 2021) and nanomaterials through green remediation (Yin et al 2021) or combined remediation (Gu et al 2020). Agricultural soil could be contaminated by several pollutants such as heavy metals (Hu et al 2020), poly-and perfluoroalkyl substances (Bolan et al 2021), and microplastics (Kumar et al 2020a).…”

Section: Introductionmentioning

confidence: 99%

Agro-Pollutants and their Nano-Remediation from Soil and Water: A Mini-Review

El-Ramady

El-Henawy

Amer

et al. 2020

EBSS

View full text Add to dashboard Cite

T HE human activities include the agricultural, industrial and other activities. The agricultural sector is considered the main source for our life's supplies. However, the agricultural activities or practices might result many pollutants such as applied mineral fertilizers, pesticides, effluents from domestic and industrial sewages and vehicular emissions. Therefore, a remediation to remove or decrease the pollutants in soil and water is needed for the environment protection. This remediation has several classic strategies several years ago, but a promising and new approaches have been established particularly nano-remediation. This nano-remediation depends on the applied nanomaterials in removing pollutants from soils and water through nano-bioremediation and nano-phytoremediation. The most important nanomaterials that have potential in removing pollutants from contaminated soils and water are nano-silica, nano-zero-valent of iron, nano-sized iron sulfide particles, nano-ZnO and others. However, many challenges or open questions are still needing a justification because using nanomaterials in higher concentrations are toxic to plants and agro-environment. Are these nanomaterials stable under environmental conditions or will be converted into toxic ones or still need to be identified for sustainable nano-remediation? Is there any possibility to enter the nanomaterials or other toxic compounds the food chain through these plants? Therefore, a lot of further research is needed concerning the nano-remediation in removal the agro-pollutants.

show abstract

Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review

Cited by 170 publications

References 134 publications

Biochar remediation of soil: linking biochar production with function in heavy metal contaminated soils

Biochar remediation of soil: linking biochar production with function in heavy metal contaminated soils

The Potential of Clover Green Amendment, Associated with Biochar, Activated Carbon or Ochre, for the Phytoremediation, Using Populus x. canescens, of a Former Mine Technosol

Agro-Pollutants and their Nano-Remediation from Soil and Water: A Mini-Review

Contact Info

Product

Resources

About