Varying effect of biochar on Cd, Pb and As mobility in a multi-metal contaminated paddy soil

Yin, Daixia; Wang, Xin; Chen, Can; Peng, Bo; Tan, Changyin; Li, Hailong

doi:10.1016/j.chemosphere.2016.01.044

Cited by 203 publications

(54 citation statements)

References 59 publications

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“…2). The results indicated the bound force of Cd to soil and amendments was weak as the result of active nature of Cd, which was consistent with other studies (Yin et al, 2016;Park et al, 2011).…”

Section: Effects Of Amendments On Speciation Distribution Of CD Zn Asupporting

confidence: 93%

“…and environmental factor (temperature, moisture, foreign heavy metal, etc.). Biochar can change soil properties such as increasing soil pH and cation exchange capacity, and thus could indirectly promote metal stability (Yin et al, 2016). Moreover, the immobilization and stability of metals can be accomplished by the interaction of heavy metals with biochar, including metal exchange, the complexation with different functional groups on biochar, the specific and nonspecific adsorption and precipitation (Zhang et al, 2013).…”

Section: Effects Of Amendments On Speciation Distribution Of CD Zn Amentioning

confidence: 99%

“…Metal availability in every soil treatment was evaluated using CaCl 2 extraction, for the reason that CaCl 2 extraction is associated with pollutant availability and considered as a reliable indicator of metal availability in contaminated soils (Yin et al, 2016;Rosende et al, 2016;McBride et al, 2004). Briefly, metal availability was conducted in 50 mL glass conical flask by adding 3 g of soil and amendment-treated soil with 30 mL of 0.01 M CaCl 2 solution.…”

Section: Measures Of CD Zn and Cu Availabilitymentioning

confidence: 99%

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Changes in heavy metal mobility and availability from contaminated wetland soil remediated with combined biochar-compost

et al. 2017

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Section: Effects Of Amendments On Speciation Distribution Of CD Zn Asupporting

confidence: 93%

Section: Effects Of Amendments On Speciation Distribution Of CD Zn Amentioning

confidence: 99%

Section: Measures Of CD Zn and Cu Availabilitymentioning

confidence: 99%

See 1 more Smart Citation

Changes in heavy metal mobility and availability from contaminated wetland soil remediated with combined biochar-compost

et al. 2017

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“…These characteristics result in an increase in pH and cationic exchange capacity . The increase in pH therefore increased the surface charges of soil particles and thus the retention of metals . Humified organic matter, which has a high capacity to interact with metal ions and mobilize or immobilize metals, could reduce their mobility (and therefore their bioavailability) in the soil profile through the formation of more or less stable complexes .…”

Section: Resultsmentioning

confidence: 99%

“…These characteristics result in a CEC and pH increase . Which modify the surface charges of soil particles and thus the retention of metals . Compost has also been shown to influence the availability of metal(loid)s by binding them to humic acids …”

Section: Resultsmentioning

confidence: 99%

Effect of Biochar and Amendments on Pb and As Phytotoxicity and Phytoavailability in a Technosol

Nandillon

Miard

Lebrun

et al. 2019

CLEAN Soil Air Water

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Phytostabilization has been proposed as a promising tool for long-term management of polluted sites. Optimization of the process efficiency involves choosing suitable amendments to allow both efficient plant growth and the immobilization of contaminants. The objectives of this study are to evaluate the effect of amendments on (i) the physicochemical properties of technosol and (ii) the mobility and phyto-availability of metal(loid)s. A dwarf bean growth test is conducted on technosols amended with compost, garden soil, slag, and biochar. The physicochemical properties of soil pore water (SPW) are determined as well as the phyto-available concentrations of metal(loid)s by simple extraction tests. All amendments used are able to increase SPW pH and electrical conductivity, allowing a decrease in the lead concentration in SPW by 90% and the lead phytoavailable part by 93%. However, for all amendments, SPW As concentration increased. Lastly, the amendments improve bean growth and tend to decrease the metal(oid) concentrations in aerial organs. As concentration in roots did not decrease whereas Pb concentration decreased. Metal(loid) concentrations of Pb accumulated in the aerial parts of beans and their extractable concentrations show a significant positive correlation with the extraction procedures. In contrast, the phytoavailable As shows a weak correlation with As concentrations in the aerial parts. The 1-M NH 4 NO 3 extraction procedure is the most appropriate and provides the most useful indications of the phytoavailability for the studied elements.

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Super‐stable mineralization effect of layered double hydroxides for heavy metals: Application in soil remediation and perspective

2021

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Agriculture soil plays a crucial role in sustainable development of human society. Unfortunately, soil quality is continuing degradation due to industrial and agricultural activities. Among them, agriculture soil contamination by heavy metals has become a serious threat to global food safety and human health. Because of low-cost, easy to implement, and fast effects, in situ chemical stabilization strategy has drawn great attention in soil remediation fields. However, since heavy metals are not removed from soil, it is still a great challenge to develop the cost-effective stabilizers with strong and longterm immobilization ability. Layered double hydroxides (LDHs) have been extensively applied in environmental fields owing to their unique structure. Very recently, LDHs have been used as amendment in in situ soil remediation for immobilization of heavy metals, exhibiting excellent long-term stability in practice application through trapping heavy metal ions into the lattice of LDHs layer. Given that the super-stable mineralization effect of LDHs for heavy metals, we summarize the structure of LDHs, key points of super-stable mineralization, practical challenges, and potential applications in other heavy metals pollution scenarios in this article, wishing that could provide new strategies and insights into rational designing of amendments for soil remediation.

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Varying effect of biochar on Cd, Pb and As mobility in a multi-metal contaminated paddy soil

Cited by 203 publications

References 59 publications

Changes in heavy metal mobility and availability from contaminated wetland soil remediated with combined biochar-compost

Changes in heavy metal mobility and availability from contaminated wetland soil remediated with combined biochar-compost

Effect of Biochar and Amendments on Pb and As Phytotoxicity and Phytoavailability in a Technosol

Super‐stable mineralization effect of layered double hydroxides for heavy metals: Application in soil remediation and perspective

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