Status of metal accumulation in farmland soils across China: From distribution to risk assessment

Niu, Lili; Yang, Fangxing; Xu, Chao; Yang, Huayun; Liu, Weiping

doi:10.1016/j.envpol.2013.01.019

Cited by 263 publications

(107 citation statements)

References 27 publications

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“…With the rapid urbanization and industrialization over the past decades in China, a large amount of heavy metals had been released into the environment with much being retained in the soil through atmospheric deposition and irrigation [1,2]. Chinese agricultural soils are suffering from increasing heavy metal pollution, among which paddy soil polluted by heavy metals is frequently reported and has drawn great public concern [3].…”

Section: Introductionmentioning

confidence: 99%

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

Xiao

Huang

et al. 2017

Sustainability

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Agricultural soils are suffering from increasing heavy metal pollution, among which, paddy soil polluted by heavy metals is frequently reported and has elicited great public concern. In this study, we carried out field experiments on paddy soil around a Pb-Zn mine to study amelioration effects of four soil amendments on uptake of Cd and Pb by rice, and to make recommendations for paddy soil heavy metal remediation, particularly for combined pollution of Cd and Pb. The results showed that all the four treatments can significantly reduce the Cd and Pb content in the late rice grain compared with the early rice, among which, the combination amendment of lime and phosphate had the best remediation effects where rice grain Cd content was reduced by 85% and 61%, respectively, for the late rice and the early rice, and by 30% in the late rice grain for Pb. The high reduction effects under the Ca + P treatment might be attributed to increase of soil pH from 5.5 to 6.7. We also found that influence of the Ca + P treatment on rice production was insignificant, while the available Cd and Pb content in soil was reduced by 16.5% and 11.7%, respectively.

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Section: Introductionmentioning

confidence: 99%

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

Xiao

Huang

et al. 2017

Sustainability

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“…One of the most significant impacts is heavy metal pollution of farmland as it serves as an intimate linkage to human food chain (Niu et al, 2013). The accumulation of metals in agricultural farmland does not only decrease the productivity and quality of crops grown, but it also greatly threatens the safety of ecosystem and human health through adverse effect.…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Concentration Levels in Soil at Lake Geriyo Irrigation Site, Yola, Adamawa State, North Eastern Nigeria

Hong¹

2014

IJEMA

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Abstract:The study assessed the physicochemical parameters and mean concentration levels of heavy metals in soil at two selected wastewater receiving sites and control site of Lake Geriyo irrigation project in order to determine the extent of heavy metal pollution due to wastewater irrigation using standard methods. The pH values at the River Benue, Shinko and control site soils were slightly acidic to neutral with mean value of 6.85, 5.75 and 7.0 respectively. Mean electrical conductivity values were 1.08µs/cm, 1.54µs/cm and 1.95µs/cm and organic matter levels are 0.75%, 2.11% and 3.5%. The textural classification of the soils revealed that the soils are predominantly sandy in nature with 56.4%, 55.6% and 50.4% sand, 20%, 16.0% and19% are clay, while 24.0%, 28.4% and 30.0% are silt. The mean concentrations of heavy metals (Fe, Zn, Mn, Cu, Cd, Cr, Pb and Ni) recorded in River Benue site soil are 86.89mg/kg, 74.38mg/kg,12.76mg/kg, 15.08mg/kg, 9.83mg/kg, 11.0mg/kg, 7.17mg/kg and 18.73mg/kg. Shinko site recorded concentration levels of 292.7mg/kg, 309.2mg/kg, 130.9mg/kg, 253.8mg/kg, 199.2mg/kg, 158.7mg/kg and 74.43mg/kg respectively, while the control site soil had concentration levels of Fe 58.48mg/kg, Zn 39.44mg/kg, Mn 7.13mg/kg, Cu 9.40mg/kg, Cd 7.62mg/kg, Cr 9.82mg/kg, Pb 6.28mg/kg and Ni 17.62mg/kg. The result showed that the concentrations of heavy metals at River Benue and Shinko site soils are more polluted than the control site soil with Shinko site soil exhibiting high levels of heavy metals concentration. Comparative analysis of this study and International threshold values of heavy metals concentration levels in soil revealed that most of the parameters at Shinko site soil are elevated above the EU, USA and UK Standards. Future study is hereby recommended to focus on the impact of heavy metal concentration on irrigated vegetables as some may find their way into the food chain and cause public health hazards to consumers.

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“…Irrigation with contaminated water greatly pollutes the fields with heavy metals, especially Cd, that affect crops and pose serious threats to human health (Meng et al, 2009). Cd is one of the most toxic elements worldwide and has the highest pollution index in China (Niu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Various strategies, such as split nitrogen application in form of ammonium or urea fertilizer, are being adopted for vegetable cultivation in Cd-contaminated soil (Fan et al, 2017), but still Cd has the highest pollution index in China (Niu et al, 2013) and is known for its carcinogenic, mutagenic, and teratogenic effects on human health. Despite being a non-essential element for plant metabolism, Cd uptake by the roots and transportation to the shoot can easily be accomplished in plants.…”

Section: Introductionmentioning

confidence: 99%

Role of jasmonic acid in improving tolerance of rapeseed (Brassica napus L.) to Cd toxicity

Ali

Hussain

Shamsi

et al. 2018

J. Zhejiang Univ. Sci. B

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Abstract:The well-known detrimental effects of cadmium (Cd) on plants are chloroplast destruction, photosynthetic pigment inhibition, imbalance of essential plant nutrients, and membrane damage. Jasmonic acid (JA) is an alleviator against different stresses such as salinity and drought. However, the functional attributes of JA in plants such as the interactive effects of JA application and Cd on rapeseed in response to heavy metal stress remain unclear. JA at 50 µmol/L was observed in literature to have senescence effects in plants. In the present study, 25 µmol/L JA is observed to be a "stress ameliorating molecule" by improving the tolerance of rapeseed plants to Cd toxicity. JA reduces the Cd uptake in the leaves, thereby reducing membrane damage and malondialdehyde content and increasing the essential nutrient uptake. Furthermore, JA shields the chloroplast against the damaging effects of Cd, thereby increasing gas exchange and photosynthetic pigments. Moreover, JA modulates the antioxidant enzyme activity to strengthen the internal defense system. Our results demonstrate the function of JA in alleviating Cd toxicity and its underlying mechanism. Moreover, JA attenuates the damage of Cd to plants. This study enriches our knowledge regarding the use of and protection provided by JA in Cd stress.

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Status of metal accumulation in farmland soils across China: From distribution to risk assessment

Cited by 263 publications

References 27 publications

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

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

Heavy Metal Concentration Levels in Soil at Lake Geriyo Irrigation Site, Yola, Adamawa State, North Eastern Nigeria

Role of jasmonic acid in improving tolerance of rapeseed (Brassica napus L.) to Cd toxicity

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