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Human-induced change in sedimentary trace metals and phosphorus in Chaohu Lake, China, over the past half-millennium
Liu, Enfeng1; Shen, Ji1; Birch, Gavin F.2; Yang, Xiangdong1; Wu, Yanhong3; Xue, Bin1
Corresponding AuthorLiu, Enfeng
2012-04-01
Source PublicationJOURNAL OF PALEOLIMNOLOGY
ISSN0921-2728
Volume47Issue:4Pages:677-691
SubtypeArticle
AbstractWe present a sedimentary geochemical record of human perturbation in the watershed and related changes in trace metals (Cr, Ni, Zn and Pb), phosphorus and abundant rock-forming elements (Al, Fe, K, Mg, etc.) in Chaohu Lake over the past 500 years, a period spanning historical agricultural expansion and modern economic development. The record exhibited a stable terrestrial detrital input to Chaohu Lake before ca. 1540 AD, a period with less human perturbation of the watershed, which resulted in low and constant values of trace metals and phosphorus (TP) concentrations as well as Al, Fe, K, Mg, fine silt (< 16 mu m), the chemical index of alteration (CIA) and K/Na ratio. Two periods of successive marked increases in Al, Fe, K, Mg, fine silt, chemical index of alteration (CIA) and K/Na ratio occurred after ca. 1540 AD and 1950 AD. The former period apparently resulted from enhanced well-weathered topsoil erosion in the watershed related to the expansion of arable land, and the latter resulted from further enhancement of human perturbation in the watershed during the modern period. Concentrations of trace metals and TP were positively correlated with that of the rock-forming elements and fine silt. Trace metal pollution was limited during 1540-1950 AD, according to the low enrichment factors (EFs = 0.8-1.1), when an increase in trace metal concentrations was also linked to changes in detrital input. In addition to detrital regulation, pollution also contributed to an increase in TP concentrations (average EF 1.4) during 1540-1950 AD and the average accumulation rate of anthropogenic phosphorus was 87.3 mg m(-2) a(-1). Anthropogenic phosphorus increased further and Pb and Zn pollution also occurred after 1950 AD, reaching maximum values after 1980 AD, when the average accumulation rates of anthropogenic Zn, Pb and phosphorus (mainly in the form of NaOH-P) were 242.2, 43.3 and 811.8 mg m(-2) a(-1), respectively. The increase in phosphorus pollution in recent decades is probably from the domestic sewage sources of Hefei City and non-point sources related to agricultural utilization of commercial fertilizer, whereas Zn and Pb pollution is probably derived mainly from industrial sources of Hefei City, as deduced from their spatial variations in the sediments of the river mouths.
KeywordTrace Metals Phosphorus Enrichment Human Impact Sediment Chaohu Lake
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1007/s10933-012-9592-7
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology
Indexed BySCI
WOS KeywordEASTERN CHINA ; YANGTZE-RIVER ; HEAVY-METALS ; REGION ; MIDDLE ; TAIHU ; SOIL ; EUTROPHICATION ; GEOCHEMISTRY ; ACCUMULATION
Language英语
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary ; Limnology
WOS IDWOS:000302803700010
Funding OrganizationNational Basic Research Program of China(2012CB956100) ; National Natural Science Foundation of China(40972217) ; Chinese Academy of Sciences(KZCX2-YW-319)
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Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/9924
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Sydney, Sch Geosci, Environm Geol Grp, Sydney, NSW 2006, Australia
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
Recommended Citation
GB/T 7714
Liu, Enfeng,Shen, Ji,Birch, Gavin F.,et al. Human-induced change in sedimentary trace metals and phosphorus in Chaohu Lake, China, over the past half-millennium[J]. JOURNAL OF PALEOLIMNOLOGY,2012,47(4):677-691.
APA Liu, Enfeng,Shen, Ji,Birch, Gavin F.,Yang, Xiangdong,Wu, Yanhong,&Xue, Bin.(2012).Human-induced change in sedimentary trace metals and phosphorus in Chaohu Lake, China, over the past half-millennium.JOURNAL OF PALEOLIMNOLOGY,47(4),677-691.
MLA Liu, Enfeng,et al."Human-induced change in sedimentary trace metals and phosphorus in Chaohu Lake, China, over the past half-millennium".JOURNAL OF PALEOLIMNOLOGY 47.4(2012):677-691.
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