Effects of wetland restoration on nitrate removal in an irrigated agricultural area: The role of in-stream and off-stream wetlands

2017 ◽  
Vol 103 ◽  
pp. 426-435 ◽  
Author(s):  
Nadia Darwiche-Criado ◽  
Francisco A. Comín ◽  
Adrià Masip ◽  
Mercedes García ◽  
Silvia G. Eismann ◽  
...  
1991 ◽  
Vol 123 (3-4) ◽  
pp. 337-354 ◽  
Author(s):  
E. Fustec ◽  
A. Mariotti ◽  
X. Grillo ◽  
J. Sajus
Keyword(s):  

1994 ◽  
Vol 30 (11) ◽  
pp. 69-78 ◽  
Author(s):  
Yongwoo Hwang ◽  
Hiroshi Sakuma ◽  
Toshihiro Tanaka

Several batch tests and pilot-scale investigations on biological denitrification with isopropanol were performed. Isopropanol was converted to acetone by microbial oxidation during denitrification. Isopropanol itself little contributed to denitrification in practice while the converted acetone played a role of a main hydrogen donor. A larger quantity of nitrite intermediate was formed by using methanol compared to the case of isopropanol. The measured requirement of isopropanol was 2.0 mg mg−1 NO3-N, and was 2/3 of methanol. The oxygen equivalent of isopropanol for nitrate removal was almost the same as that of methanol. The denitrifier net growth yield for isopropanol was greater than for methanol. In order to maximize the denitrification rate, it is essential to convert isopropanol to acetone rapidly by accurate dosing for nitrogen load because the denitrification rate was accelerated by using acetone only. Excessive dose of isopropanol can cause a decrease in the denitrification rate as well as an increase of BOD in the effluent.


RSC Advances ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 3285-3293 ◽  
Author(s):  
Xiawei Liu ◽  
Jian Xu ◽  
Jiaolong Huang ◽  
Manqi Huang ◽  
Tao Wang ◽  
...  

A cost-effective system for nitrate removal was developed with the key role of iron and genus Hydrogenophaga.


Crisis ◽  
2010 ◽  
Vol 31 (6) ◽  
pp. 328-334 ◽  
Author(s):  
Anastasia E. Kastanaki ◽  
Christos F. Kraniotis ◽  
Elena F. Kranioti ◽  
Despoina Nathena ◽  
Pavlos N. Theodorakis ◽  
...  

Background: The role of pesticides in suicidal acts has not yet received adequate attention in Greece despite an evident rise of 39% in pesticide use over the period 1990–1992 to 2002–2004. Aims: To investigate the epidemiology of pesticide suicide on the Greek island of Crete, a largely rural agricultural area, and by further exploring the victim profiles, as well as patterns and trends of pesticide ingestion, to suggest probable preventive measures. Methods: Self-poisoning suicides between 1999 and 2007 were reviewed and information gathered was entered into a computerized database. Results: The overall incidence of intentional pesticide poisoning was 1.7 per 100,000, representing the second most frequently used suicide method after hanging. The victim profile was composed of the following features: middle aged male, rural habitant, who carried out a suicidal act by consuming primarily methomyl or paraquat (WHO toxicity class Ib and class II, respectively). As to the place of death, the vast majority was found dead in the place of intoxication. Conclusions: Pesticide self-poisoning accounts for a quarter of the suicides in Crete. More detailed research is required to identify aspects of these deaths amenable to prevention, but measures such as bans on the most toxic pesticides and changes in storage practice would appear to be sensible initial approaches.


2021 ◽  
pp. 112158
Author(s):  
Kuppusamy Sathishkumar ◽  
Yi Li ◽  
Mohamad S. Alsalhi ◽  
Balakrishnan Muthukumar ◽  
Gajendra Kumar Gaurav ◽  
...  

2020 ◽  
Vol 746 ◽  
pp. 141089
Author(s):  
Yongze Lu ◽  
Xin Li ◽  
Yue Chen ◽  
Yongzhen Wang ◽  
Guangcan Zhu ◽  
...  
Keyword(s):  

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