Impact of organic amendments (biochar, compost and peat) on Cd and Zn mobility and solubility in contaminated soil of the Campine region after three years

Egene, Caleb Elijah; Poucke, Reinhart Van; Ok, Yong Sik; Meers, Erik; Tack, Filip

doi:10.1016/j.scitotenv.2018.01.054

Cited by 149 publications

(42 citation statements)

References 48 publications

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“…Chen et al [50] observed that in contaminated alfisol 48-70% transformation of soluble Cd to organic bond Cd occurred by compost application. Although biochar is well known for its HMs adsorption capacity, WB treated tailings showed higher bioavailable Cd content as compared to other amendments, and this result might be because of the fact that biochar is comparatively more recalcitrant and resilient to degradation, and eventually it needs longer time to mineralize through physical or biological processes than other organic amendments [51].…”

Section: Dtpa-extracted Pb Zn CD and Cu Concentrations In Treated Tmentioning

confidence: 93%

Phytostabilization of Pb-Zn Mine Tailings with Amorpha fruticosa Aided by Organic Amendments and Triple Superphosphate

et al. 2020

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A greenhouse pot trial was conducted to investigate the effect of organic amendments combined with triple superphosphate on the bioavailability of heavy metals (HMs), Amorpha fruticosa growth and metal uptake from Pb-Zn mine tailings. Cattle manure compost (CMC), spent mushroom compost (SMC) and agricultural field soil (AFS) were applied to tailings at 5%, 10%, 20% and 30% w/w ratio, whereas sewage sludge (SS) and wood biochar (WB) were mixed at 2.5%, 5%, 10% and 20% w/w ratio. Triple superphosphate (TSP) was added to all the treatments at 4:1 (molar ratio). Amendments efficiently decreased DTPA-extracted Pb, Zn, Cd and Cu in treatments. Chlorophyll contents and shoot and root dry biomass significantly (p < 0.05) increased in the treatments of CMC (except T4 for chlorophyll b) and SMC, whereas treatments of SS (except T1 for chlorophyll a and b), WB and AFS (except T4 for chlorophyll a and b) did not show positive effects as compared to CK1. Bioconcentration factor (BCF) and translocation factor (TF) values in plant tissues were below 1 for most treatments. In amended treatments, soluble protein content increased, phenylalanine ammonialyase (PAL) and polyphenol oxidase (PPO) decreased, and catalase (CAT) activity showed varied results as compared to CK1 and CK2. Results suggested that A. fruticosa can be a potential metal phytostabilizer and use of CMC or SMC in combination with TSP are more effective than other combinations for the in situ stabilization of Pb-Zn mine tailings.

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Section: Dtpa-extracted Pb Zn CD and Cu Concentrations In Treated Tmentioning

confidence: 93%

Phytostabilization of Pb-Zn Mine Tailings with Amorpha fruticosa Aided by Organic Amendments and Triple Superphosphate

et al. 2020

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“…Moreover, European policy has recognised soil organic carbon (SOC) as an instrument to reduce CO 2 emission through soil C sequestration (Lugato et al 2014). Finally, organic soil improvers have also proven their potential utilisation to reduce metal mobility in soils exhibiting elevated concentrations, and by doing so alleviate associated environmental risks (Van Poucke et al 2020;Egene et al 2018). Therefore, there is a need for increased utilisation of C-rich biosolids in agriculture to improve soil organic matter and increase soil C reserves.…”

Section: Introductionmentioning

confidence: 99%

Solid fraction of separated digestate as soil improver: implications for soil fertility and carbon sequestration

et al. 2020

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Purpose This study investigated the C and N mineralisation potential of solid fractions (SFs) from co-digestated pig manure after P-stripping (P-POOR SF) in comparison with P-rich SFs, as a means to estimate their organic matter stability in soil. Compost (COMP) and biochar (BCHR) (made from P-POOR SF) were also included in the study as reference biosolids. Methods The SFs were incubated in a sandy-loam soil under moist conditions to determine production of CO2 and mineral N. At specified intervals, CO2 evolution in the mixtures was measured via the alkali trap method and titration over a period of 81 days, while mineral N was measured using a flow analyser after KCl extraction over a period of 112 days. Results The various SFs showed similar patterns of C mineralisation (15–26% of added total C in 81 days) that were clearly higher than for COMP and BCHR (6% and 7%, respectively). Temporary N immobilisation was observed in biosolids with a high C/N ratio. The effective organic matter (EOM) of the SFs was calculated based on the C mineralisation data and varied between 130 and 369 kg Mg−1. Conclusions The SF with a reduced P content had a high EOM/P ratio which is beneficial in areas where P status of the soil is already high. Moreover, the N mineralisation patterns confirm that a high C/N ratio may also reduce risks for N leaching due to temporary N immobilisation.

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“…The presence of organic matter redistributed the PTE to less-available forms and thus ameliorated its toxicity to plants [25]. The solubility of PTE is high in an acidic pH, whereas addition of lime and biochar (BC) can increase the soil pH and thus can decrease the bioavailability [26][27][28]. Biochars are porous, low density, and carbon-rich solid products from the pyrolysis of waste biomass.…”

Section: Introductionmentioning

confidence: 99%

Amendment of Husk Biochar on Accumulation and Chemical Form of Cadmium in Lettuce and Pak-Choi Grown in Contaminated Soil

Chen

Pai

Lai

2020

Water

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(1) Background: Cadmium (Cd) accumulated in vegetables not only affects their growth but can also enter the human body via food chains and lead to various illnesses. Plants can decrease the toxicity by changing the chemical forms of Cd, which include inorganic (FE), water-soluble (FW), pectate- and protein-integrated (FNaCl), undissolved phosphate (FHAc), oxalate (FHCl), and residual forms (FR). Among them, FE and FW chemical forms show higher mobility to translocate upward from roots to shoots compared with the others. (2) Methods: Different varieties or cultivars of lettuce and pak-choi were grown in Cd-contaminated soils amended with husk biochar (BC) to replenish nitrogen to the recommended amount and also to raise the soil pH value. (3) Results: More than 73% of the accumulated Cd in the edible organs was compartmentalized in FE chemical form in both leafy vegetables regardless of treatments. In comparison with control, the application of BC decreased the Cd concentrations and bioconcentration factors in the roots and shoots of two leafy vegetables at different growth periods in general. The chemical form and bioaccessible fraction of Cd in the edible blanching tissues were used to calculate the risk of oral intake. The vegetable-induced hazard quotients of lettuce and pak-choi were acceptable, except for pak-choi grown in control without applying BC.

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Impact of organic amendments (biochar, compost and peat) on Cd and Zn mobility and solubility in contaminated soil of the Campine region after three years

Cited by 149 publications

References 48 publications

Phytostabilization of Pb-Zn Mine Tailings with Amorpha fruticosa Aided by Organic Amendments and Triple Superphosphate

Phytostabilization of Pb-Zn Mine Tailings with Amorpha fruticosa Aided by Organic Amendments and Triple Superphosphate

Solid fraction of separated digestate as soil improver: implications for soil fertility and carbon sequestration

Amendment of Husk Biochar on Accumulation and Chemical Form of Cadmium in Lettuce and Pak-Choi Grown in Contaminated Soil

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