Soil Amendments for Heavy Metal Immobilization Using Different Crops

2016 ◽  
pp. 371-399
Author(s):  
Mahar Amanullah ◽  
Amjad Ali ◽  
Wang Ping ◽  
Wang Quan ◽  
Shen Feng ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Soil Amendments ◽  
Metal Immobilization ◽  
Heavy Metal Immobilization

scholarly journals Effects of Soil Amendments on Heavy Metal Immobilization and Accumulation by Maize Grown in a Multiple-Metal-Contaminated Soil and Their Potential for Safe Crop Production

Toxics ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 102
Author(s):  
Fayuan Wang ◽  
Shuqi Zhang ◽  
Peng Cheng ◽  
Shuwu Zhang ◽  
Yuhuan Sun
Keyword(s):  
Heavy Metal ◽  
Plant Growth ◽  
Contaminated Soil ◽  
Crop Production ◽  
Metal Uptake ◽  
Soil Amendments ◽  
Heavy Metal Uptake ◽  
X Ray ◽  
Metal Immobilization ◽  
Heavy Metal Immobilization

Soil amendments have been proposed for immobilizing metallic contaminants, thus reducing their uptake by plants. For the safe production of crops in contaminated soil, there is a need to select suitable amendments that can mitigate heavy metal uptake and enhance crop yield. The present experiment compared the effects of three amendments, hydroxyapatite (HAP), organic manure (OM), and biochar (BC), on plant growth and heavy metal accumulation by maize in an acidic soil contaminated with Cd, Pb, and Zn, and their potential for safe crop production. Toxicity characteristic leaching procedure (TCLP) tests, energy dispersive X-ray spectroscopy (EDS) analysis, and X-ray diffraction (XRD) analysis were used to evaluate the effectiveness and mechanisms of heavy metal immobilization by the amendments. The results showed that shoot and root biomass was significantly increased by HAP and 1% OM, with an order of 1% HAP > 0.1% HAP > 1% OM, but not changed by 0.1% OM and BC (0.1% and 1%). HAP significantly decreased Cd, Pb, and Zn concentrations in both shoots and roots, and the effects were more pronounced at the higher doses. OM decreased the shoot Cd and Pb concentrations and root Zn concentrations, but only 1% OM decreased the shoot Zn and root Pb concentrations. BC decreased the shoot Cd and Pb concentrations, but decreased the shoot Zn and root Pb concentrations only at 1%. HAP decreased the translocation factors (TFs) of Cd, Pb, and Zn (except at the 0.1% dose). OM and BC decreased the TFs of Cd and Zn, respectively, at the 1% dose but showed no significant effects in other cases. Overall, plant P, K, Fe, and Cu nutrition was improved by HAP and 1% OM, but not by 0.1 OM and BC. Soil pH was significantly increased by HAP, 1% OM, and 1% BC, following an order of 1% HAP > 1% OM > 0.1% HAP > 1% BC. The TCLP levels for Cd, Pb, and Zn were significantly reduced by HAP, which can be partly attributed to its liming effects and the formation of sparingly soluble Cd-, Pb-, and Zn-P-containing minerals in the HAP-amended soils. To some extent, all the amendments positively influenced plant and soil traits, but HAP was the optimal one for stabilizing heavy metals, reducing heavy metal uptake, and promoting plant growth in the contaminated soil, suggesting its potential for safe crop production.

Comparison of heavy metal immobilization in contaminated soils amended with peat moss and peat moss-derived biochar

2016 ◽  
Vol 18 (4) ◽  
pp. 514-520 ◽  
Author(s):  
Jin Hee Park ◽  
Seul-Ji Lee ◽  
Myoung-Eun Lee ◽  
Jae Woo Chung
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soils ◽  
Soil Amendments ◽  
Peat Moss ◽  
Metal Immobilization ◽  
Heavy Metal Immobilization

Soil amendments showed contradictory results in heavy metal immobilization. Peat moss increased mobility and bioavailability of heavy metals in soil while peat moss-derived biochar decreased both through the coordination of metal electrons to CC bonds of the biochar.

scholarly journals Improved heavy metal immobilization of compacted clay by cement treatment

Heliyon ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. e06917
Author(s):  
Chairat Teerawattanasuk ◽  
Panich Voottipruex ◽  
Suksun Horpibulsuk
Keyword(s):  
Heavy Metal ◽  
Compacted Clay ◽  
Metal Immobilization ◽  
Heavy Metal Immobilization ◽  
Cement Treatment

Heavy Metal Immobilization Potential of Indigenous Bacteria Isolated from Gold Mine Tailings

2019 ◽  
Vol 14 (1) ◽  
pp. 71-86 ◽  
Author(s):  
Muibat Omotola Fashola ◽  
Veronica Mpode Ngole-Jeme ◽  
Olubukola Oluranti Babalola
Keyword(s):  
Heavy Metal ◽  
Mine Tailings ◽  
Gold Mine ◽  
Indigenous Bacteria ◽  
Metal Immobilization ◽  
Gold Mine Tailings ◽  
Heavy Metal Immobilization
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