scholarly journals İçme Sularından Nitrat Gideriminde İkincil Kirleticilerin Denitrifikasyona Etkisi / The Effect of Co-Contaminant on Denitrification Removal of Nitrate in Drinking Water

2013 ◽  
Vol 1 (4) ◽  
pp. 475
Author(s):  
Arzu KILIÇ ◽  
Serden BAŞAK ◽  
Kevser CIRIK ◽  
Dilek ÖZGÜN ◽  
Dilek AKMAN ◽  
...  
Keyword(s):  
Drinking Water ◽  
Biological Treatment ◽  
Nitrate Removal ◽  
Water Source ◽  
Nitrate Pollution ◽  
Drinking Water Source ◽  
Treatment Processes ◽  
Cheap Method ◽  
Contaminated Drinking Water ◽  
Interesting Alternative

Son yıllarda tarımda bilinçsizce kullanılan azotlu gübreler ve arıtılmadan deşarj edilen atıksular yeraltısularında nitrat kirliliğinin artmasına neden olmuştur. Geçmişteki çalışmalar birçok ülkede yeraltısuyunda nitrat konsantrasyonunun hızında artış olduğunu göstermektedir. Ülkemizde yeraltısularının ve kullanılabilir içme suyu kaynaklarının kirlilik haritası henüz çıkarılmış değildir. Yapılan bölgesel çalışmalarda ülkemizdeki kaynakların da hızlı bir şekilde kirlendiği görülmektedir. Şanlıurfa, Harran ovasında, Akdeniz kıyı bölgelerinde yapılan çalışmalarda kuyularda nitrat konsantrasyonun yükseldiği belirtilmektedir. İçme sularının nitratla kirlenmesinin yanı sıra artan su tüketimi, bilinçsiz gübreleme ve tarım ilaçlarının kullanımı içme suyu kaynaklarında nitratla birlikte ikincil kirleticilerinde ortaya çıkmasına neden olmuştur. Son zamanlarda nitratla kirlenmiş sularda arsenik, pestisit, perklorat, kromat, gibi insan sağlığı için tehlikeli ikincil kirleticilere rastlanmaktadır. Nitrat giderimi için kullanılan uygulanabilirliği zor ve pahalı yöntemlerin yanında biyolojik arıtım yöntemleri daha ekonomik ve uygulanabilir olmaları nedeniyle son yıllarda araştırmacıların ilgisini çekmektedir. Ancak ikincil kirleticiler ile kirlenmiş sularda biyolojik denitrifikasyonun etkinliği ve uygulanabilirliği üzerine sınırlı sayıda çalışma bulunmaktadır. Bu makalenin amacı içme sularından nitrat giderimi için etkili ve ucuz bir yöntem olan biyolojik denitrifikasyonun, nitrat yanında ikincil kirleticiler ile kirlenmiş yeraltısularının arıtımında kullanılabilirliğinin irdelenmesidir. The Effect of Co-Contaminant on Denitrification Removal of Nitrate in Drinking Water In recent years, nitrogenous fertilizers used in agriculture, unconscious and without treatment wastewater is discharged led to an increase in groundwater nitrate pollution. In many countries, nitrate concentration in the ground waters used as drinking water source exceeded the maximum allowable concentration of 10 mg/L NO3-N. Additionally, increased water consumption, unconscious use of fertilizers and pesticides has led to the emergence of co-contaminant in drinking water. Recently, hazardous to human health co-contaminant such as arsenic, pesticides, perchlorate, selenite, chromate, uranium are observed in the nitrate pollution drinking water. There are many processes used for the removal of nitrate. The physicalchemical technologies that can be used for nitrate removal are reverse osmosis, ion exchange and electro dialysis. Important disadvantages of these processes are their poor selectivity, high operation and maintenance costs and the generation of brine wastes after treatment. Consequently, biological treatment processes to convert nitrates to benign dinitrogen gas, could be an interesting alternative for the remediation of groundwater contaminated with nitrates. The aim of this article, effective and cheap method for the removal of nitrate from drinking water biological denitrification is to examine the usability of contaminated drinking water with co-contaminant pollutions.

Global return flow ratio

2017 ◽  
Author(s):  
Chloé Meyer
Keyword(s):  
Drinking Water ◽  
Water Source ◽  
Return Flow ◽  
Drinking Water Source ◽  
Chemical Contamination ◽  
Flow Ratio ◽  
Piped Water ◽  
Dug Wells

Population using an improved drinking water source (piped water into dwellings, yards or plots; public taps or standpipes; boreholes or tubewells; protected dug wells; or protected springs and rainwater) that is located on premises and available when needed and which is free of faecal and priority chemical contamination. Basin Pollution Quality Waste

scholarly journals Are children’s stools in Ghana disposed of safely? Evidence from the 2014 Ghana demographic and health survey

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Abdul-Aziz Seidu
Keyword(s):  
Drinking Water ◽  
Health Survey ◽  
Water Source ◽  
Demographic And Health Survey ◽  
Outcome Variable ◽  
Drinking Water Source ◽  
Safe Disposal ◽  
Toilet Facility ◽  
Improved Sanitation ◽  
Northern Zone

Abstract Background Safe disposal of children’s faeces has always been one of the main challenges to good hygiene in Ghana. Although it has been proven that children’s faeces are more likely to spread diseases than adults’ faeces, people usually mistake them for harmlessness. This study, therefore, sought to determine the prevalence and factors associated with safe disposal of children’s faeces in Ghana. Methods Data from the 2014 Ghana Demographic and Health Survey was used for the analysis. A sample size of 2228 mother-child pairs were used for the study. The outcome variable was disposal of children stools. Both bivariate and multivariable logistic regression analyses were performed to identify the factors with safe child stool disposal. Results The prevalence of safe child stool disposal in Ghana was 24.5%. Women in the middle [Adjusted odds ratio (AOR) = 4.62; Confidence Interval (CI) = 3.00–7.10], Coastal Zone [AOR = 4.52; CI = 2.82–7.22], mothers whose children were aged 12–17 [AOR = 1.56; CI = 1.15–2.13] and 18–23 months [AOR = 1.75; CI = 1.29–2.39], and mothers whose household had improved type of toilet facility [AOR = 2.04; CI = 1.53–2.73] had higher odds of practicing safe children’s faeces disposal. However, women from households with access to improved source of drinking water [AOR = 0.62; CI = 0.45–2.7] had lower odds of practicing safe children’s faeces disposal. Conclusion Approximately only about 25 out of 100 women practice safe disposal of their children’s faeces in Ghana. The age of the child, ecological zone, the type of toilet facilities, and the type of drinking water source are associated with the disposal of child faeces. These findings have proven that only improved sanitation (i.e. drinking water and toilet facilities) are not enough for women to safely dispose of their children’s faeces. Therefore, in addition to provision of toilet facilities especially in the northern zone of Ghana, there is also the need to motivate and educate mothers on safe disposal of children’s stools especially those with children below 12 months. More so, mothers without access to improved toilet facility should also be educated on the appropriate ways to bury their children’s stools safely.

Divergent responses of diverse microalgae commonly found in drinking water source water to UV-C treatment

2021 ◽  
Author(s):  
Jordan Roszell ◽  
Po-Shun Chan ◽  
Brian Petri ◽  
Ted Mao ◽  
Kathleen Nolan ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Source ◽  
Drinking Water Source ◽  
Source Water ◽  
Uv C

Double-endpoint Genotoxicity Quantification and PAHs Characterization of Drinking Water Source alongside Polluted Yinghe River with High Tumor Mortality

2021 ◽  
Vol 41 (2) ◽  
pp. 189-198
Author(s):  
Wei Zhang ◽  
Chen Guo ◽  
Xiao-li Wang ◽  
Zhan-lu Lv ◽  
Lin Fan ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Source ◽  
Drinking Water Source
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