Pollen Spectra from Lake Surface Sediments in the Swiss Alps

1988 ◽  
Vol 20 (3) ◽  
pp. 310 ◽  
Author(s):  
Rolf W. Mathewes
Keyword(s):  
Surface Sediments ◽  
Swiss Alps ◽  
Lake Surface

Variations in rare earth elements with environmental factors in lake surface sediments from 17 lakes in western China

2021 ◽  
Vol 18 (7) ◽  
pp. 1811-1822
Author(s):  
Ding-ding Du ◽  
Liu-qin Chen ◽  
Yong-hui Bai ◽  
Hai-ping Hu
Keyword(s):  
Rare Earth ◽  
Environmental Factors ◽  
Rare Earth Elements ◽  
Surface Sediments ◽  
Western China ◽  
Lake Surface

Acid Volatile Sulfide (AVS) and Simultaneously Extracted Metals (SEM) in Surface Sediments of Chaohu Lake, Anhui Province, China

2013 ◽  
Vol 779-780 ◽  
pp. 1213-1219
Author(s):  
Shu Qin Chen ◽  
Lei Zhang ◽  
Zhao Sheng Chu ◽  
She Rong Hu
Keyword(s):  
Surface Sediments ◽  
Local Scale ◽  
Acid Volatile Sulfide ◽  
Anthropogenic Factors ◽  
Chaohu Lake ◽  
Lake Surface ◽  
Different Seasons ◽  
The One ◽  
Short Time ◽  
Spot 5

At present there are few studies on the AVS and SEM in sediments of Chaohu Lake. Most of the previous studies on heavy metals based on the one time, the short-time or a local-scale survey. In this paper, [AVS] and [SEM] in Chaohu Lake surface sediments were studied for different seasons in 2007, 2008 and 2009. The results showed that: (a) The three-year average of [AV and [ΣSE in surface sediments of Chaohu Lake is 4.2μmolg-1and 2.31μmolg-1, respectively. The maximum of [AV appears on spot 5 (14.845μmolg-1) in summer while the minimum appears on spot 9 (0.13μmolg-1) in winter. (b) In spot 5 which near the estuary of Yuxi River, three-year average of [SE was the maximum (5.81μmolg-1), and the minimum of [ΣSE (0.07μmolg-1) appears on spot 8 which locates in the middle of Chaohu Lake. In spot 13 the [ΣSEM]-[AVS]=3.2>2 and [ΣSEM]/[AVS]=4.45>2.34 indicate that heavy metal contaminants from Hefei city have threatened the biosafety of Chaohu Lake. (c) The spatial autocorrelation of SEMCdis weak, which indicates that spatial distribution of SEMCdis determined by anthropogenic factors rather than sediments' own attribute. Chaohu Lake has been heavily polluted by Cd from no-point source and electronic electroplating industry.

Early diagenesis of organic matter and related sulphur incorporation in surface sediments of meromictic Lake Cadagno in the Swiss Alps

1996 ◽  
Vol 25 (5-7) ◽  
pp. 379-390 ◽  
Author(s):  
Anke Putschew ◽  
Barbara M. Scholz-Böttcher ◽  
Jürgen Rullkötter
Keyword(s):  
Organic Matter ◽  
Surface Sediments ◽  
Early Diagenesis ◽  
Meromictic Lake ◽  
Swiss Alps

Environmental Risk Assessment of Lake Surface Sediments Using Trace Elements: A Case Study, the Wular Lake

2020 ◽  
Vol 95 (2) ◽  
pp. 145-151
Author(s):  
Rayees Ahmad Shah ◽  
Hema Achyuthan ◽  
Aasif Mohmad Lone ◽  
Suhail Ahmad Lone ◽  
M. Subzar Malik
Keyword(s):  
Risk Assessment ◽  
Trace Elements ◽  
Environmental Risk ◽  
Environmental Risk Assessment ◽  
Surface Sediments ◽  
Lake Surface ◽  
Wular Lake
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