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Analysis of the spatial and temporal characteristics and sources of heavy metal pollution in arable soils in rapidly urbanizing cities in western China
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  • Professor Chengyi Huang,
  • Mr. Zhangyong Gou,
  • Mr. Shengjie Huang,
  • Mr. Xinpeng Ma,
  • Professor Zedong Shi,
  • Professor Guitang Liao,
  • Professor Ouping Deng,
  • Ling Luo,
  • Wei Zhou ,
  • Zhang Cheng,
  • Professor Yanzong Zhang,
  • Professor Yuangxiang Yang,
  • Dr Conggang Fang,
  • Dr Chao Chen
Professor Chengyi Huang
Sichuan Agricultural University

Corresponding Author:[email protected]

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Mr. Zhangyong Gou
Sichuan Agricultural University
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Mr. Shengjie Huang
Sichuan Agricultural University
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Mr. Xinpeng Ma
Sichuan Agricultural University
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Professor Zedong Shi
Sichuan Agricultural University
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Professor Guitang Liao
Chengdu University of Information Technology
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Professor Ouping Deng
Sichuan Agricultural University
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Ling Luo
Sichuan Agricultural University
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Wei Zhou
Sichuan Agricultural University
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Zhang Cheng
Sichuan Agricultural University
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Professor Yanzong Zhang
Sichuan Agricultural University
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Professor Yuangxiang Yang
Sichuan Agricultural University
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Dr Conggang Fang
Planning and Natural Resources Information Center of Chengdu
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Dr Chao Chen
Sichuan Agricultural University
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Abstract

For the purpose of heavy metals’ spatial-temporal trends and source allocation in arable soil with the rapid urbanization in Western China, samples were collected in two stages (2008 and 2017) in Chengdu city which was chosen for the case study. Positive Matrix Factorization (PMF) receptor models and Multivariate statistical analysis were used to understand the heavy metals’ spatial-temporal variability. The results showed that Cd, Cr, and As in arable soil were presented with an increasing trend during the 10-year period. Semi-variation analysis showed that the block basis ratios of the five heavy metals (Pb, As, Cr, Hg, and Cd) showed an increasing trend, which suggests that the spatial distribution of heavy metals in arable soil is more influenced by human disturbances. The source analysis shows that the enrichment of As is closely related to agricultural activities in both phases (2008 and 2017). Further source analysis showed that source of As did not change, but the contribution increased significantly. The main sources of Hg pollution changed from agricultural activities to medical equipment manufacturing, Cd changed from soil parent material sources to chemical industry waste emissions, and the sources of Pb and Cr expanded from single transportation sources to multiple sources such as road traffic and human construction. In this study, the examining of the temporal and spatial patterns of heavy metal contamination in farmland of typical rapidly developing cities in China can also provide a basis for the conservation and management of arable soil in similar areas in the context of rapid urbanization in China.
12 May 2023Submitted to Land Degradation & Development
16 May 2023Submission Checks Completed
16 May 2023Assigned to Editor
20 May 2023Review(s) Completed, Editorial Evaluation Pending
25 Jul 2023Reviewer(s) Assigned
27 Sep 2023Editorial Decision: Revise Major
30 Sep 20231st Revision Received
30 Sep 2023Review(s) Completed, Editorial Evaluation Pending
30 Sep 2023Submission Checks Completed
30 Sep 2023Assigned to Editor
15 Oct 2023Reviewer(s) Assigned
20 Aug 2024Editorial Decision: Revise Major