Alleviation of cadmium phytotoxicity to wheat is associated with Cd re-distribution in soil aggregates as affected by amendments

Li, Shanshan; Wang, Meng; Zhao, Zhongqiu; Li, Xiaoyue; Han, Yun; Chen, Shibao

doi:10.1039/c8ra03066a

Cited by 31 publications

(13 citation statements)

References 35 publications

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“…The role of AMF played in Cd uptake could be explained by changes in soil macroaggregates and total glomalin-related soil protein (T-GRSP) content in Cd-contaminated soils [ 7 , 43 ]. Additionally, soil macroaggregates possessing relatively higher mass Cd loading reduced Cd mobility and its export from contaminated soils [ 44 ]. However, the presence of AMF did not result in increase in total Cd uptake in white clover plants in our experiments (Fig.…”

Section: Discussionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi reduce potassium, cadmium and ammonium losses but increases nitrate loss under high intensity leaching events

Xiao

Chen

2022

BMC Plant Biol

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Background Nutrients and heavy metals can be lost from soils via leaching, and arbuscular mycorrhizal fungi (AMF) can influence these events. Soil column experiments were carried out to examine whether leaching intensity and AMF can alter nutrient and Cd uptake in white clover plants and the extent of their losses through leaching. Results The presence of AMF significantly increased shoot and total biomass, as well as increased N, P, Cu and Zn uptake independent of water amount applied; while root P and Cu uptakes were promoted by AMF at any water amount treatments. Higher water amounts led to reductions in total N, K and Zn uptake for AMF-colonized plants in comparison to moderate water amount treatments. In the absence of AMF, white clover at low water amount treatment exhibited maximal root Cd uptake. At high water amount treatments, the presence of AMF significantly decreased leachate volumes and the amount of leached NH4+, K and Cd while AMF significantly increased the amounts of leached NO3−. Conclusions Overall we found that AMF-colonized white clover plants reduced NH4+, K and Cd loss from soils but increased the risk of NO3− loss under high intensity leaching conditions.

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Section: Discussionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi reduce potassium, cadmium and ammonium losses but increases nitrate loss under high intensity leaching events

Xiao

Chen

2022

BMC Plant Biol

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“…EDTA extraction is closely related to toxic metals’ bioavailability to plants and other organisms. 49 Therefore, the EDTA extraction procedure was used to assess the metals’ (Cd, Pb, and As) mobility and the efficiency of remediation. The EDTA extraction was conducted in a 50 mL centrifugal tube; 10 g of soil was mixed with 50 mL of 0.05 mol/L EDTA (pH = 7.0), and the mixture was shaken (180 rpm/min) for 2 h. After that, the mixture was filtered and analyzed.…”

Section: Materials and Methodsmentioning

confidence: 99%

“…EDTA extraction is closely related to toxic metals’ bioavailability to plants and other organisms . Therefore, the EDTA extraction procedure was used to assess the metals’ (Cd, Pb, and As) mobility and the efficiency of remediation.…”

Section: Materials and Methodsmentioning

confidence: 99%

Assessment of Zeolite, Biochar, and Their Combination for Stabilization of Multimetal-Contaminated Soil

et al. 2020

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In this study, the natural zeolite and rice husk biochar were mixed as a combination amendment for metal immobilization in a Cd, Pb, As, and W co-contaminated soil. A 90 day incubation study was conducted to investigate the effects of amendments on toxic metal in soil. Zeolite, biochar, and their combination application increased the soil pH and cation exchange capacity. A combination of amendments decreased the bioavailability of Cd, Pb, As, and W. Besides, the potential drawback of biochar application on As and W release was overcome by the combination agent. Zeolite, biochar, and combination treatment decreased total bioavailability toxicity from 335.5 to 182.9, 250.5, and 143.4, respectively, which means that combination was an optimum amendment for soil remediation. The results of the Community Bureau of Reference sequential extraction and scanning electron microscopy–energy-dispersive spectrometry images confirmed the Cd and Pb adsorption onto biochar. However, As and W immobilization was dominantly controlled by zeolite. It appears that the combination of amendments is an efficient amendment to remediate Cd, Pb, As, and W co-contamination in soil, although the combination of amendments has a lower stabilization rate for W than for zeolite.

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“…In this study, four different amendments were prepared and compared: Ad1 contained a mixture of attapulgite and triple superphosphate; Ad2 consisted of zeolite and triple superphosphate; Ad3 was prepared by blending hydroxyapatite and humus; and Ad4 was the rice hull biochar prepared by high temperature carbonization (up to 550 • C). More information about the amendment preparation and their characteristics has been described in detail in our previous paper [33]. All reagents were of analytical reagent grade and used as supplied from Sinopharm Chemical Reagent Ce.…”

Section: Materials and Chemicalsmentioning

confidence: 99%

Adsorption and Desorption of Cd by Soil Amendment: Mechanisms and Environmental Implications in Field-Soil Remediation

Wang

Zhao

et al. 2018

Sustainability

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In China, 1/5 of the total farmland area is Cd-enriched; the wide occurrence of Cd-contaminated soil in China has already posed significant public health risk and deserves immediate action. In situ immobilization has been regarded as one of the most promising agricultural extension-technologies for remediating low-to-medium levels of heavy metal contaminated land in China. Although extensive research has been conducted to examine the effectiveness of different amendments on remediation of Cd-contaminated soils, the influence of changed soil properties on secondary release of Cd from Cd-amendment to soil is rarely known. The objective of this study was to evaluate the effectiveness of four soil amendments (denoted as Ad1, Ad2, Ad3 and Ad4, their main components being clay mineral, base mineral, humus and biochar, respectively) on reducing Cd availability and increasing Cd stability in soil. The maximum adsorption capacity of test amendments on Cd ranged from 7.47 to 17.67 mg g−1. The characterizations of test amendments before and after Cd loading provided the evidence that surface precipitation and ion exchange were the main reasons for Ad1 and Ad2 to adsorb Cd, and complexation was for Ad3 and Ad4. In addition, there was significant increase in the desorption percentages of Cd from amendments as pH decreased (from 7 to 1) or ion strength increased (from 0 to 0.2 M). Comparatively, Ad3 and Ad4 could be more effective for in situ immobilization of Cd in contaminated soils, due to their high adsorption capacities (12.82 and 17.67 mg g−1, respectively) and low desorption percentages (4.46–6.23%) at pH from 5 to 7 and ion strengths from 0.01 to 0.1 mol L−1. The results obtained in this study could provide a guideline for in-situ remediation of Cd polluted field-soil in China.

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Alleviation of cadmium phytotoxicity to wheat is associated with Cd re-distribution in soil aggregates as affected by amendments

Abstract: Soil aggregates exert a significant influence on the retention and bioavailability of Cd in soil.

Cited by 31 publications

References 35 publications

Arbuscular mycorrhizal fungi reduce potassium, cadmium and ammonium losses but increases nitrate loss under high intensity leaching events

Arbuscular mycorrhizal fungi reduce potassium, cadmium and ammonium losses but increases nitrate loss under high intensity leaching events

Assessment of Zeolite, Biochar, and Their Combination for Stabilization of Multimetal-Contaminated Soil

Adsorption and Desorption of Cd by Soil Amendment: Mechanisms and Environmental Implications in Field-Soil Remediation

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