Properties of Selected Chemicals of Environmental Significance

2009 ◽  
pp. 425-430
Keyword(s):  
Environmental Significance

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.

Acid etching induced defective Co3O4 as an efficient catalyst for methane combustion reaction

2021 ◽  
Vol 45 (7) ◽  
pp. 3546-3551
Author(s):  
Liurui Bao ◽  
Le Chang ◽  
Lisha Yao ◽  
Wenhao Meng ◽  
Qiang Yu ◽  
...  
Keyword(s):  
Noble Metal ◽  
Methane Combustion ◽  
Combustion Reaction ◽  
Metal Catalyst ◽  
Acid Etching ◽  
Noble Metal Catalyst ◽  
Environmental Significance ◽  
Efficient Catalyst

Development of an effective Co3O4 material as an advanced non-noble metal catalyst for methane combustion has great economic and environmental significance.

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