Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction model

Wu, Jiahui; Song, Qingmei; Zhou, Jingyan; Wu, Yingxin; Liu, Xiaowen; Liu, Junjun; Zhou, Lingli; Wu, Zhuohao; Wu, Wencheng

doi:10.1016/j.ecoenv.2020.111420

Cited by 29 publications

(16 citation statements)

References 58 publications

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“…The total Cd content was about tenfold the maximum found in normal Oklahoma soils [26]. The DTPA-extractable Cd has been considered the most efficient method to predict the Cd phytoavailability to grasses, such as rice (Oryza sativa) [27] and perennial ryegrass [11]. Still, the threshold of DTPA-extractable Cd found by Wu et al [27] was 0.03 to 0.16 mg kg −1 depending on the soil organic matter (SOM) content, which is more than 10 times lower than the content found in the Tar Creek soil of this study.…”

Section: Soil Sampling and Analysismentioning

confidence: 99%

Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil

Antonângelo

Zhang

2021

Environments

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Little is known about the effect of nitrogen (N) application via biochar on the removal of trace elements by crops, and the effects with chemical fertilizers are inconsistent. We determined, from a previous study, the influence of increased N addition via biochars produced from switchgrass (SGB) and poultry litter (PLB) on cadmium (Cd) removal by ryegrass. The biochar rates of 0, 0.5, 1, 2, and 4% w/w were applied to a Cd-contaminated soil before seeding in a potting experiment with a complete randomized block design (CRBD). Ryegrass yield and N and Cd removed by harvest were strongly related (p < 0.05). The ryegrass yields increased up to 1% of PLB, and Cd removal was also the highest at 1% of PLB. The biomass of ryegrass roots increased with Cd accumulation (p < 0.05). Overall, the Cd transfer factor (TF) from ryegrass roots to shoots increased when up to 206 ± 38 kg N ha−1 was removed in ryegrass shoots (p < 0.0001). The application of PLB up to 1% might be a viable option since it is a practical rate for handling operations requiring less volume of material than SGB. Additionally, the Cd concentration in the aboveground forage remained acceptable for grazing cattle. Future studies are encouraged to evaluate different sources of N fertilizers affecting Cd uptake on cash crops.

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Section: Soil Sampling and Analysismentioning

confidence: 99%

Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil

Antonângelo

Zhang

2021

Environments

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“…10,17 There are weak correlations between total soil TE concentrations and plant TE concentrations because the TE uptake of plants from soil also depends on the plant variety and the available soil pool, which is affected by several soil properties, such as pH, organic matter content and cation exchange capacity. 18,19 Measuring the extractable TE concentration in soil may provide a more reliable prediction of TE accumulation in crops. 20 Chinese flowering cabbage (Brassica parachinensis L.) is an important vegetable in China that is cultivated year-round and exported worldwide.…”

Section: Introductionmentioning

confidence: 99%

A risk‐based approach for the safety analysis of eight trace elements in Chinese flowering cabbage (Brassica parachinensis L.) in China

Wang

et al. 2021

J Sci Food Agric

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BACKGROUND: Most countries set regulatory values for the total trace element (TE) concentrations in soil, although there is growing interest in using a risk-based approach to evaluate the bioavailable TE using dilute salt extractants or other soil parameters, including pH and organic carbon . The present study compares the current regulatory system (based on total TEs and pH) and a risk-based approach using 0.01 mol L -1 CaCl 2 to estimate the bioavailable fraction. RESULTS: In total, 150 paired samples of Chinese flowering cabbages (Brassica parachinensis) and their growth soils were collected, and the total and extractable concentrations of chromium (Cr), cadmium (Cd), lead (Pb), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As) and mercury (Hg), as well as soil pH and organic matter content, were measured. No more than 3.33% of the edible parts exceeded Chinese food safety standards, even when growing in soils exceeding the current regulatory thresholds by over 50%. The total soil Cd (1.5 mg kg −1 ), as well as the extractable concentrations of Cd (0.1 mg kg −1 ), Ni (0.03 mg kg −1 ) and Zn (0.1 mg kg −1 ), are the key factors affecting the TE concentrations in B. parachinensis.CONCLUSION: Our findings suggest that the current soil regulatory guidelines for safe production of B. parachinensis are overly strict and conservative. A risk-based approach based on the extractable TE concentrations would provide a better indication for plant uptake of soil TEs and avoid the waste of farmlands that can still produce safe vegetables. Future research should focus on providing crop-specific available TE concentration guidelines to promote effective utilization of farmlands.

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“…A recent troubling source of HM contaminants is electronic waste (e-waste). E-waste is characterized by multiple HMs species, most of which are dangerous (Wu et al, 2021). Vegetables and crops produced in the soil around e-waste recycling areas can be contaminated with Zn, Cd, Ni, Cu, and Pb (Yu et al, 2019).…”

Section: Solid Wastesmentioning

confidence: 99%

Heavy Metals in Food Crops: Ideal Sources and Roles of Urban Agriculture in Facilitating Their Consumption- A Review

Abdullahi¹,

Igwe²,

Dandago³

et al. 2021

FJS

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The qualities of agricultural soil and water are diminishing continuously due to the rigorous anthropogenic activities currently stocking the soil with a lot of toxic chemicals including heavy metals. Heavy metals are highly persistent and non-biodegradable, control of their contamination is very tricky to handle. Their presence in soil and water is detrimental to food crops and humans. Various sources of heavy metals contaminants and the role of urban food production on human heavy metal contamination were discussed.Heavy metals have their way into the soil and food crops through wastewater irrigation and production in contaminated soil. The habitual heavy metals contamination sources for food crops are wastewater irrigation, abuse of agrochemicals, production in the contaminated field, atmospheric deposit when foods are exposed to contaminated air, and unethical mining activities. Agricultural soil in urban and peri-urban areas are heavily contaminated with heavy metal due to various anthropogenic activities. Wastewater irrigation intensify the contamination by supplying the soil with more heavy metals. The heavy metals are passed to food during production and subsequently to humans after consumption.

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Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction model

Cited by 29 publications

References 58 publications

Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil

Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil

A risk‐based approach for the safety analysis of eight trace elements in Chinese flowering cabbage (Brassica parachinensis L.) in China

Heavy Metals in Food Crops: Ideal Sources and Roles of Urban Agriculture in Facilitating Their Consumption- A Review

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