scholarly journals Iron-sulfur distribution and its environmental significance in three typical areas of western Lake Taihu

2019 ◽  
Vol 31 (4) ◽  
pp. 950-960 ◽  
Author(s):  
WU Songjun ◽  
◽  
WANG Xuan ◽  
JI Qiuyi ◽  
WANG Mingyue ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Environmental Significance ◽  
Sulfur Distribution ◽  
Iron Sulfur ◽  
Western Lake

scholarly journals Pollutant transport rates in the rivers around western Lake Taihu

2018 ◽  
Vol 30 (6) ◽  
pp. 1509-1517 ◽  
Author(s):  
ZHU Jinge ◽  
◽  
LIU Xin ◽  
DENG Jiancai ◽  
PENG Junxiang ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Pollutant Transport ◽  
Western Lake

scholarly journals Analysis of Historical Sources of Heavy Metals in Lake Taihu Based on the Positive Matrix Factorization Model

2018 ◽  
Vol 15 (7) ◽  
pp. 1540 ◽  
Author(s):  
Yan Li ◽  
Liping Mei ◽  
Shenglu Zhou ◽  
Zhenyi Jia ◽  
Junxiao Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Grain Size ◽  
Matrix Factorization ◽  
Lake Taihu ◽  
Rapid Development ◽  
Positive Matrix Factorization ◽  
Positive Matrix ◽  
Pmf Model ◽  
Western Lake

Analysis of sediment grain sizes and heavy metal correlations in the western part of Lake Taihu shows that the grain size of the sediment is stable as a whole. With increasing depth, the grain size tends to decrease. Heavy metals such as Cr, Cd, Pd and Sr are strongly correlated and influence each other. Based on the positive matrix factorization (PMF) model, this study classified the origin of heavy metals in the sediments of western Lake Taihu into three major categories: Agricultural, industrial and geogenic. The contributions of the three heavy metal sources in each sample were analyzed and calculated. Overall, prior to the Chinese economic reform, the study area mainly practiced agriculture. The sources of heavy metals in the sediments were mostly of agricultural and geogenic origin, and remained relatively stable with contribution rates of 44.07 ± 11.84% (n = 30) and 35.67 ± 11.70% (n = 30), respectively. After the reform and opening up of China, as the economy experienced rapid development, industry and agriculture became the main sources of heavy metals in sediments, accounting for 56.99 ± 15.73% (n = 15) and 31.22 ± 14.31% (n = 15), respectively. The PMF model is convenient and efficient, and a good method to determine the origin of heavy metals in sediments.

Temporal-spatial variations of euphotic depth of typical lake regions in Lake Taihu and its ecological environmental significance

2006 ◽  
Vol 49 (4) ◽  
pp. 431-442 ◽  
Author(s):  
Yunlin Zhang ◽  
Boqiang Qin ◽  
Weiping Hu ◽  
Sumin Wang ◽  
Yuwei Chen ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Spatial Variations ◽  
Environmental Significance ◽  
Euphotic Depth

Environmental significance of atrazine in aqueous systems and its removal by biological processes: an overview

2013 ◽  
Vol 8 (2) ◽  
pp. 159-178 ◽  
Keyword(s):  
Drinking Water ◽  
Ground Water ◽  
Water Environment ◽  
Biological Processes ◽  
Biological Degradation ◽  
Environmental Significance ◽  
Carbon And Nitrogen ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Living Organisms

Atrazine, a chlorinated s-triazine group of herbicide is one of the most widely used pesticides in the World. Due to its extensive use, long half-life and various toxic properties, it has very high environmental significance. Up to 22 mg l-1 of atrazine was found in ground water whereas permissible limit of atrazine is in ppb level in drinking water. As per Indian standard there should not be any pesticide present in drinking water. Among many other treatment processes available, Incineration, adsorption, chemical treatment, phytoremediation and biodegradation are the most commonly used ones. Biological degradation of atrazine depends upon various factors like the operating environment, external carbon and nitrogen sources, carbon/ nitrogen ratio (C/N), water content and the bacterial strain. Although, general atrazine degradation pathways are available, the specific pathways in specific conditions are not yet clearly defined. In this paper extensive review has been made on the occurrence of atrazine in surface and ground water bodies, probable sources and causes of its occurrence in water environment, the toxicity of atrazine on various living organisms and its removal by biological processes.

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