Lime and Phosphate Amendment Can Significantly Reduce Uptake of Cd and Pb by Field-Grown Rice

Xiao, Rongbo; Huang, Zehong; Li, Xiaonuo; Chen, Weiping; Deng, Yangbo; Han, Cunliang

doi:10.3390/su9030430

Cited by 40 publications

(14 citation statements)

References 15 publications

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“…This decreases the activity of contaminants in soil that reduced phytotoxicity which ultimately leading to a significant increase in yield 46 . It has been reported that mixture of lime and phosphate amendments increased rice biomass in Cd contaminated field 47 . Liming was also testified to sustain crop yield in Cd contaminated soil 48 .…”

Section: Resultsmentioning

confidence: 98%

Immobilization of cadmium and lead in contaminated paddy field using inorganic and organic additives

Hamid

Tang

Wang

et al. 2018

Sci Rep

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Heavy metal contamination of agricultural soils has posed a risk to environment and human health. The present study was conducted to assess the effectiveness of soil amendments for reducing cadmium (Cd) and lead (Pb) uptake by rice (Oryza sativa L) in a contaminated field. The soil amendments used include lime, DaSan Yuan (DASY), DiKang No.1 (DEK1), biochar, Fe-biochar, Yirang, phosphorus fertilizer, (Green Stabilizing Agent) GSA-1, GSA-2, GSA-3, and GSA-4, applied at 1% rate in a field experiment. The results exposed that GSA-4 treatment showed best effects on reducing Cd and Pb phytoavailability in soil and uptake by early rice. Linear increase in pH (i.e. 5.69 to 6.75) was recorded in GSA-4 amended soil from sowing to the 3rd month of growth season. GSA-4 decreased DTPA extractable contents of cadmium (Cd) from 0.324 to 0.136 mg kg−1 soil and lead (Pb) from 53.21 to 24.68 mg kg−1 soil at 90 days of amendment. Treatment with GSA-4 improved rice growth (56%) and grains yield (42%). The enhancement effects on grain yield may be result from the positive effects of GSA-4 application on increasing photosynthesis (116%) and transpiration rate (152%) as compared to the control. Significant reduction in Cd and Pb uptake in shoot (42% and 44%) and in grains (77 and 88%), was observed, respectively in GSA-4 treatment as compared with the control. Moreover, negative correlation was recorded between DTPA extractable Cd/Pb and soil pH that directly depended on applied amendments. In short, use of combined amendment (GSA-4) was more effective for immobilizing heavy metals in contaminated paddy field, and secures rice safe production, as compared other tested amendment products.

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Section: Resultsmentioning

confidence: 98%

Immobilization of cadmium and lead in contaminated paddy field using inorganic and organic additives

Hamid

Tang

Wang

et al. 2018

Sci Rep

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“…HAP is a typical inorganic chemical amendment that immobilized heavy metals 25 . Generally, the primary mechanisms of HAP for metal immobilization are adsorption, precipitation, cation exchange, and surface complexation, and involved processes as the follows [26][27][28] (Eqs. 2-4): HAP is dissolved in acidic soil, then Cd ions are adsorbed on the surface of HAP to form phosphate precipitates.…”

Section: Resultsmentioning

confidence: 99%

The Immobilization of Soil Cadmium by the Combined Amendment of Bacteria and Hydroxyapatite

Zeng

et al. 2020

Sci Rep

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the remediation of heavy metal-contaminated soils has attracted increased attention worldwide. The immobilization of metals to prevent their uptake by plants is an efficient way to remediate contaminated soils. this work aimed to seek the immobilization of cadmium in contaminated soils via a combination method. Flask experiments were performed to investigate the effects of hydroxyapatite (HAp) and the Cupriavidus sp. strain ZSK on soil pH and DtpA-extractable cadmium. pot experiments were carried out to study the effects of the combined amendment on three plant species. The results showed that HAP has no obvious influence on the growth of the strain. With increasing concentrations of HAp, the soil pH increased, and the DtpA-extractable cd decreased. Via the combined amendment of the strain and HAP (SH), the DTPA-extractable Cd in the soil decreased by 58.2%. With the combined amendment of the SH, the cadmium accumulation in ramie, dandelion, and daisy decreased by 44.9%, 51.0%, and 38.7%, respectively. Moreover, the combined amendment somewhat benefitted the growth of the three plant species and significantly decreased the biosorption of cadmium. These results suggest that the immobilization by the SH combination is a potential method to decrease the available cadmium in the soil and the cadmium accumulation in plants. Soil is the main sink for metals and acts as a barrier to prevent their entry into the food chain 1. However, human activities such as mining and metal smelting have gradually transferred many toxic metals from the earth's crust to the environment, resulting in the spread and contamination of heavy metals 2-4. In recent decades, heavy metal pollution has become a serious problem worldwide. In China, it was reported that 13.33% of all soil samples collected from 6.3 million square kilometres of land were polluted with high levels of metals 5. Cadmium pollution has been detected in all agricultural areas. Cadmium is chemically stable and does not undergo chemical or microbial degradation. Moreover, cadmium is not an essential element for living organisms. Generally, it is regarded as the most toxic among heavy metals 6. Cadmium in the soil harms plant cells by altering metabolic pathways, damaging chloroplasts and mitochondria, and causing oxidative damage to lipids and proteins 7,8 , and cadmium also interferes with the uptake and transport of essential elements, e.g., P and K 9. Excessive Cd can reduce iron uptake by plants, affecting their photosynthesis 10. Cadmium can also accumulate in plants and animals and thus enters the human body through the food chain, threatening health 11,12. Thus, it is an enormous challenge to remediate heavy metal-contaminated soils worldwide. Various physical, chemical and biological techniques have been used to remediate heavy metal-contaminated soils 1. In situ immobilization is generally considered a feasible technique to remediate metal-contaminated soils due to its cost effectiveness and ease of operation 13. Many researchers have reported on the use of various...

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“…Numerous reports on the application of lime for the remediation of heavy metal-contaminated soils have been published (Simón et al 2010;Hale et al 2012;Chen et al 2016;Cui et al 2016). In some previous studies, the application of lime significantly reduced Cd accumulation in rice grain below the Cd limiting standards (Bian et al 2016;Li et al 2016a;Xiao et al 2017). In these cases, lime was applied to heavy metal-contaminated paddy soils to immobilize Cd (Hu et al 2016).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Effects and Mechanism of Continuous Liming on Cadmium Immobilization and Uptake by Rice Grown on Acid Paddy Soils

Liu

Huang

Xiong-hui³

et al. 2020

J Soil Sci Plant Nutr

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Lime application is the most effective agricultural practice for the reduction of cadmium (Cd) bioavailability in acid soils. This study was conducted to investigate the impact of continuous liming across five consecutive growing seasons on the remediation of Cd in acid paddy soils, as well as rice yield. Two rice cultivars, i.e., Zhuliangyou 819 and Xiangwanxian 12, were cultivated in Cd-contaminated paddy soil for five consecutive growing seasons from 2014 to 2018. The investigated lime levels were 0, 450, 900, 1350, 1800, 2250, 3000, and 3750 kg ha −1. Lime application significantly increased rice yield, soil pH, exchangeable soil Ca 2+ , and rice calcium (Ca) contents; besides, it reduced soil and rice Cd contents. The application of lime at the rate of 1350-2250 kg ha −1 significantly increased rice yield. Under continuous liming, rice yield obviously increased first and then decreased with the cumulative application of lime. The application of a cumulative lime amount of 18,000 kg ha −1 was identified as the critical transition point of soil pH, soil Cd, and rice Cd content. Application of lime up to or above 3000 kg ha −1 per season reduced Cd content in brown rice below 0.20 mg kg −1. The results suggest that the reduction in effective Cd content might be a result of the combined action of exchangeable soil Ca 2+ and soil pH rather than being a direct effect of Ca 2+. Therefore, acid Cdcontaminated paddy fields can realize the safe production of rice by the continuous application of an appropriate amount of lime.

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Lime and Phosphate Amendment Can Significantly Reduce Uptake of Cd and Pb by Field-Grown Rice

Cited by 40 publications

References 15 publications

Immobilization of cadmium and lead in contaminated paddy field using inorganic and organic additives

Immobilization of cadmium and lead in contaminated paddy field using inorganic and organic additives

The Immobilization of Soil Cadmium by the Combined Amendment of Bacteria and Hydroxyapatite

Effects and Mechanism of Continuous Liming on Cadmium Immobilization and Uptake by Rice Grown on Acid Paddy Soils

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