Distribution Characteristics and Risk Assessment of Heavy Metals in Soil from an Agricultural Park of Xinmadun Village, Zhuhai City

Tao GU; Xin-wen ZHAO; Xue-yuan HU; Wang YU; Min ZENG; Jie-tao WANG

doi:10.15898/j.cnki.11-2131/td.201712100190

2018 Vol. 37, No. 4

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Article navigation > Rock and Mineral Analysis > 2018 > 37(4): 419-430

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Tao GU, Xin-wen ZHAO, Xue-yuan HU, Wang YU, Min ZENG, Jie-tao WANG. Distribution Characteristics and Risk Assessment of Heavy Metals in Soil from an Agricultural Park of Xinmadun Village, Zhuhai City[J]. Rock and Mineral Analysis, 2018, 37(4): 419-430. doi: 10.15898/j.cnki.11-2131/td.201712100190

Citation:

Tao GU, Xin-wen ZHAO, Xue-yuan HU, Wang YU, Min ZENG, Jie-tao WANG. Distribution Characteristics and Risk Assessment of Heavy Metals in Soil from an Agricultural Park of Xinmadun Village, Zhuhai City[J]. Rock and Mineral Analysis, 2018, 37(4): 419-430. doi: 10.15898/j.cnki.11-2131/td.201712100190

Distribution Characteristics and Risk Assessment of Heavy Metals in Soil from an Agricultural Park of Xinmadun Village, Zhuhai City

1.
Wuhan Center of Geological Survey, China Geological Survey, Wuhan 430205, China
2.
School of Public Administration, China University of Geosciences(Wuhan), Wuhan 430074, China

More Information

Corresponding author: Xin-wen ZHAO, zhaoxinwen0413@163.com

Received Date: 10 December 2017

Revised Date: 11 March 2018

Accepted Date: 07 May 2018

Abstract

Abstract

BACKGROUNDThe problem of heavy metal contamination in farmland is more and more serious, and has become one of the main factors that restrict the development of ecological agriculture, which has raised attention. OBJECTIVESTo study spatial distribution characteristics of heavy metals in small scale farmland and use it as an effective guide for land management. METHODSSoil, irrigation water, agricultural products and chemical fertilizer from an agricultural park in Xinmadun village, Zhuhai. RESULTSIt was revealed that the content of Cd in surface soil was relatively high, with the average value 3.7 times higher than the background value in the Pearl River Delta (0.11 mg/kg), classified as moderate pollution scale and serious potential ecological risk. The Cd pollution was related to the long-term cadmium phosphate fertilizer overuse having a mean cadmium phosphate fertilizer content of 20.5 mg/kg. The average contents of Cu, Pb, Zn, Cr, Ni, As, and Hg in surface soil were lower than the soil environmental standard Ⅰ and was classified as low potential ecological risk. The vertical distribution of 8 heavy metals in four soil profiles presented different characteristics, which was influenced by the heterogeneity and discontinuity of the soil. The concentrations of heavy metals in the irrigation water and edible parts of five agricultural products were in compliance with standards. Bok choy and ficus carica had higher potential in enriching heavy metals, while aspartame, jujube and dragon fruit had lower enrichment potential. CONCLUSIONSIt is suggested to reduce the usage of cadmium phosphate fertilizer in the agricultural park, pay attention to the potential ecological hazard of cadmium, and choose breeds of crop that have weaker heavy metal enrichment capacity.
- agricultural park /
- soil /
- heavy metals /
- risk assessment /
- agricultural products /
- phosphate fertilizer

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References

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