Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction model
Cadmium (Cd) contamination in soil-rice systems has become a global public concern. However, influencing factors and the contamination threshold of Cd in soils remain largely unknown owing to soil heterogeneity, which limits our ability to assess the risk to human health and to draft appropriate env...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-01-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651320312574 |
| _version_ | 1818720613068439552 |
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| author | Jiahui Wu Qingmei Song Jingyan Zhou Yingxin Wu Xiaowen Liu Junjun Liu Lingli Zhou Zhuohao Wu Wencheng Wu |
| author_facet | Jiahui Wu Qingmei Song Jingyan Zhou Yingxin Wu Xiaowen Liu Junjun Liu Lingli Zhou Zhuohao Wu Wencheng Wu |
| author_sort | Jiahui Wu |
| collection | DOAJ |
| description | Cadmium (Cd) contamination in soil-rice systems has become a global public concern. However, influencing factors and the contamination threshold of Cd in soils remain largely unknown owing to soil heterogeneity, which limits our ability to assess the risk to human health and to draft appropriate environmental policies. In this study, we selected the soil-rice system of Longtang and Shijiao town in southern China, which was characterized by multi-metal acidic soil contamination due to improper electronic waste recycling activities, as a case to analyze the influence of different soil properties on the Cd threshold in the soil and Cd accumulation in rice. The results showed that soil organic matter (SOM) was the main factor regulating Cd accumulation in the soil-rice system. Moreover, compared with the total Cd concentration, the DTPA-extractable Cd concentration in the soil was a better predictor of Cd transportation in the soil-rice system. According to the prediction model, when SOM was < 35 g kg−1, the CdDTPA threshold was 0.16 mg kg−1 with a 95% likelihood of Cdrice accumulation above the Chinese food standard limit (0.2 mg kg−1). Conversely, when SOM was ≥ 35 g kg−1, the CdDTPA threshold was only 0.03 mg kg−1. This study of the influence of SOM on Cd accumulation in a soil-rice system confirms that SOM is a crucial parameter for better and safer rice production, especially in multi-metal contaminated acidic soils. |
| first_indexed | 2024-12-17T20:25:37Z |
| format | Article |
| id | doaj.art-712848079d5449eda654645e5d9f9aaa |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-12-17T20:25:37Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-712848079d5449eda654645e5d9f9aaa2022-12-21T21:33:48ZengElsevierEcotoxicology and Environmental Safety0147-65132021-01-01208111420Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction modelJiahui Wu0Qingmei Song1Jingyan Zhou2Yingxin Wu3Xiaowen Liu4Junjun Liu5Lingli Zhou6Zhuohao Wu7Wencheng Wu8South China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR ChinaSouth China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR ChinaSouth China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR ChinaSouth China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR ChinaSouth China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR ChinaSouth China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR ChinaSouth China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR ChinaSouth China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR ChinaCorresponding author.; South China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR ChinaCadmium (Cd) contamination in soil-rice systems has become a global public concern. However, influencing factors and the contamination threshold of Cd in soils remain largely unknown owing to soil heterogeneity, which limits our ability to assess the risk to human health and to draft appropriate environmental policies. In this study, we selected the soil-rice system of Longtang and Shijiao town in southern China, which was characterized by multi-metal acidic soil contamination due to improper electronic waste recycling activities, as a case to analyze the influence of different soil properties on the Cd threshold in the soil and Cd accumulation in rice. The results showed that soil organic matter (SOM) was the main factor regulating Cd accumulation in the soil-rice system. Moreover, compared with the total Cd concentration, the DTPA-extractable Cd concentration in the soil was a better predictor of Cd transportation in the soil-rice system. According to the prediction model, when SOM was < 35 g kg−1, the CdDTPA threshold was 0.16 mg kg−1 with a 95% likelihood of Cdrice accumulation above the Chinese food standard limit (0.2 mg kg−1). Conversely, when SOM was ≥ 35 g kg−1, the CdDTPA threshold was only 0.03 mg kg−1. This study of the influence of SOM on Cd accumulation in a soil-rice system confirms that SOM is a crucial parameter for better and safer rice production, especially in multi-metal contaminated acidic soils.http://www.sciencedirect.com/science/article/pii/S0147651320312574RiceCadmiumSoil environmental factorsPath analysisSoil thresholds |
| spellingShingle | Jiahui Wu Qingmei Song Jingyan Zhou Yingxin Wu Xiaowen Liu Junjun Liu Lingli Zhou Zhuohao Wu Wencheng Wu Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction model Ecotoxicology and Environmental Safety Rice Cadmium Soil environmental factors Path analysis Soil thresholds |
| title | Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction model |
| title_full | Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction model |
| title_fullStr | Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction model |
| title_full_unstemmed | Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction model |
| title_short | Cadmium threshold for acidic and multi-metal contaminated soil according to Oryza sativa L. Cadmium accumulation: Influential factors and prediction model |
| title_sort | cadmium threshold for acidic and multi metal contaminated soil according to oryza sativa l cadmium accumulation influential factors and prediction model |
| topic | Rice Cadmium Soil environmental factors Path analysis Soil thresholds |
| url | http://www.sciencedirect.com/science/article/pii/S0147651320312574 |
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