Human-induced change in sedimentary trace metals and phosphorus in Chaohu Lake, China, over the past half-millennium
文献类型：期刊论文
| 作者 | Liu, Enfeng1; Shen, Ji1; Birch, Gavin F.2; Yang, Xiangdong1; Wu, Yanhong3 ; Xue, Bin1
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| 刊名 | JOURNAL OF PALEOLIMNOLOGY
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| 出版日期 | 2012-04-01 |
| 卷号 | 47期号:4页码:677-691 |
| 关键词 | Trace metals Phosphorus Enrichment Human impact Sediment Chaohu Lake |
| ISSN号 | 0921-2728 |
| 通讯作者 | Liu, Enfeng |
| 英文摘要 | We 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. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 类目[WOS] | Environmental Sciences ; Geosciences, Multidisciplinary ; Limnology |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology |
| 关键词[WOS] | EASTERN CHINA ; YANGTZE-RIVER ; HEAVY-METALS ; REGION ; MIDDLE ; TAIHU ; SOIL ; EUTROPHICATION ; GEOCHEMISTRY ; ACCUMULATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000302803700010 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/9924]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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