Seasonal Variations and Aeration Effects on Water Quality Improvements and Physiological Responses ofNymphaea TetragonaGeorgi

2013 ◽  
Vol 15 (6) ◽  
pp. 522-535 ◽  
Author(s):  
Xiao-Ming Lu ◽  
Peng-Zhen Lu ◽  
Min-Sheng Huang ◽  
Ling-Peng Dai
Keyword(s):  
Water Quality ◽  
Seasonal Variations ◽  
Physiological Responses ◽  
Quality Improvements

scholarly journals Declining bacteria, lead, and sulphate, and rising pH and oxygen in the lower Mississippi River

AMBIO ◽  
2021 ◽  
Author(s):  
R. Eugene Turner
Keyword(s):  
Water Quality ◽  
Mississippi River ◽  
Pollution Abatement ◽  
National Policy ◽  
Quality Improvements ◽  
Sulfur Dioxide Emissions ◽  
Dramatic Decline ◽  
Before And After ◽  
Lower Mississippi River ◽  
The 1960S

AbstractVarious air and water pollution issues in the US were confronted in the last 60 years using national policy legislation, notably the Clean Water Act and the Clean Air Act. I examine changes in the concentrations of bacteria, oxygen, lead, and sulphate at the terminus of the Mississippi River before and after these pollution abatement efforts. Microbial concentrations increased or were stable from 1909 to 1980 but decreased about 3 orders of magnitude after the 1970s, while the average oxygen content increased. A large decline in lead concentration occurred after the 1960s, along with a less dramatic decline in sulphate concentrations. The pH of the river dropped to a low of 5.8 in 1965 as sulfur dioxide emissions peaked and averaged 8.2 in 2019 after emissions declined. Decades of efforts at a national scale created water quality improvements and are an example for addressing new and existing water quality challenges.

Water quality improvements in the Sudbury, Ontario, Canada area related to reduced smelter emissions

1986 ◽  
Vol 31 (3-4) ◽  
pp. 765-774 ◽  
Author(s):  
W. Keller ◽  
J. Roger Pitblado ◽  
N. I. Conroy
Keyword(s):  
Water Quality ◽  
Quality Improvements ◽  
Smelter Emissions

scholarly journals Analysis and Prediction on Water Quality Improvements by Aquatic Plants in a Storage

2013 ◽  
Vol 13 (6) ◽  
pp. 439-446 ◽  
Author(s):  
Eung Seok Kim ◽  
Kuy Bum Sim ◽  
Gunhui Chung ◽  
Hyun Il Choi
Keyword(s):  
Water Quality ◽  
Aquatic Plants ◽  
Quality Improvements
Sign in / Sign up

Export Citation Format

Share Document