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author:

Jia, Jia (Jia, Jia.) [1] | Bai, Junhong (Bai, Junhong.) [2] | Xiao, Rong (Xiao, Rong.) [3] (Scholars:肖蓉) | Tian, Shimin (Tian, Shimin.) [4] | Wang, Dawei (Wang, Dawei.) [5] | Wang, Wei (Wang, Wei.) [6] | Zhang, Guangliang (Zhang, Guangliang.) [7] | Cui, Hao (Cui, Hao.) [8] | Zhao, Qingqing (Zhao, Qingqing.) [9]

Indexed by:

EI SCIE

Abstract:

Coastal reclamation for cropland has led to the accumulation of heavy metals in soils, bringing about pervasive and severe risks for environment and human health. However, less is known about the influence of long-term reclamation on heavy metals risk, mobility and bioavailability in cropland soil. In this study, we determined six heavy metals (Cd, Cr, Ni, Cu, Zn and Pb) and their fractionations in soils from five croplands across a 100year reclamation chronosequence in the Pearl River estuary. Results showed that across five reclaimed soils, Cd posed seriously ecological risk and bioavailability according to assessments based on both total contents (single-metal pollution index: Cd > Cu > Zn > Ni > Cr > Pb) and fractionations (risk assessment code: Cd > Zn > Cu > Ni > Pb > Cr). Cr, Ni, Cu, Zn and Pb posed slightly to moderately ecological risks, and were mainly bound to residual (73.70%) and reducible (15.86%) fractions with lower mobility and bioavailability. With the highest risks level, mobility, toxicity and bioavailability (5.67% exchangeable and 11.75% carbonate fractions bound), Cd was identified as the main pollution factor in study area. Principal component analysis and Pearson's correlation analysis revealed that anthropogenic reclamation activities (including phosphate fertilizers, pesticides and sewage irrigation) were the major sources of these heavy metals. Long-term reclamation activities induced the increases of soil organic matter, clay contents, total concentrations and non-residual fractions of heavy metals by 46.14%, 538.98%, 42.87% and 219.78%, respectively, demonstrating significant promotions in level and mobility of heavy metals due to longer-term agricultural activities, higher soil clay and organic matter content.

Keyword:

Ecological risk assessment Fractionation Reclamation chronosequence Source

Community:

  • [ 1 ] [Jia, Jia]Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China
  • [ 2 ] [Bai, Junhong]Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China
  • [ 3 ] [Wang, Dawei]Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China
  • [ 4 ] [Wang, Wei]Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China
  • [ 5 ] [Zhang, Guangliang]Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China
  • [ 6 ] [Cui, Hao]Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China
  • [ 7 ] [Jia, Jia]Yellow River Inst Hydraul Res, Henan Key Lab Ecol Environm Protect & Restorat Ye, Zhengzhou 45003, Peoples R China
  • [ 8 ] [Tian, Shimin]Yellow River Inst Hydraul Res, Henan Key Lab Ecol Environm Protect & Restorat Ye, Zhengzhou 45003, Peoples R China
  • [ 9 ] [Xiao, Rong]Fuzhou Univ, Coll Environm & Resources, Fuzhou 350108, Peoples R China
  • [ 10 ] [Zhao, Qingqing]Qilu Univ Technol, Shandong Acad Sci, Ecol Inst, Shandong Prov Key Lab Appl Microbiol, Jinan 250103, Peoples R China

Reprint 's Address:

  • [Bai, Junhong]Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China

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Source :

SCIENCE OF THE TOTAL ENVIRONMENT

ISSN: 0048-9697

Year: 2021

Volume: 807

1 0 . 7 5 3

JCR@2021

8 . 2 0 0

JCR@2023

ESI Discipline: ENVIRONMENT/ECOLOGY;

ESI HC Threshold:114

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 39

SCOPUS Cited Count: 44

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

Online/Total:154/10011040
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