Corrigendum: Analytical quantification of electrochemical ferrates for drinking water treatments

2017 ◽  
Vol 95 (12) ◽  
pp. 1332-1332 ◽  
Author(s):  
Macarena A. Cataldo Hernández ◽  
Andrew May ◽  
Arman Bonakdapour ◽  
Madjid Mohseni ◽  
David P. Wilkinson
Keyword(s):  
Drinking Water ◽  
Analytical Quantification ◽  
Water Treatments

scholarly journals Analytical quantification of electrochemical ferrates for drinking water treatments

2017 ◽  
Vol 95 (1) ◽  
pp. 105-112 ◽  
Author(s):  
Macarena A. Cataldo Hernández ◽  
Andrew May ◽  
Arman Bonakdapour ◽  
Madjid Mohseni ◽  
David P. Wilkinson
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Analytical Methods ◽  
Advantages And Disadvantages ◽  
Excellent Candidate ◽  
Colorimetric Measurements ◽  
Analytical Quantification ◽  
Time Required ◽  
The Cost ◽  
Water Treatments

Ferrate ions are a highly oxidizing and unstable species that are challenging to quantify and analyze. They are, however, becoming increasingly recognized as an excellent candidate for a number of applications such as for water treatment. A wider acceptance of ferrates requires an accurate assay of the produced ferrates. We report on four analytical methods (existing and new) for quantification of ferrates and discuss their advantages and disadvantages. These methods include titrimetric analysis and spectrometric techniques such as direct colorimetric measurements of ABTS or NaI colorimetric. In terms of accuracy, the cost, simplicity, and time required the modified indirect UV-Vis NaI method is shown to be the most effective of all of the four methods investigated.

Novel bacterial strains for the removal of microcystins from drinking water

2011 ◽  
Vol 63 (6) ◽  
pp. 1137-1142 ◽  
Author(s):  
L. A. Lawton ◽  
A. Welgamage ◽  
P. M. Manage ◽  
C. Edwards
Keyword(s):  
Drinking Water ◽  
Cost Effective ◽  
Health Impact ◽  
Effective Solution ◽  
Bacterial Isolates ◽  
Bacterial Strains ◽  
Successful Isolation ◽  
The World ◽  
Water Treatments ◽  
Significant Health

Microcystins (MC) and nodularin (NOD) are common contaminants of drinking water around the world and due to their significant health impact it is important to explore suitable approaches for their removal. Unfortunately, these toxins are not always removed by conventional water treatments. One of the most exciting areas that hold promise for a successful and cost effective solution is bioremediation of microcystins. Recent work resulted in successful isolation and characterisation of 10 novel bacterial strains (Rhodococcus sp., Arthrobacter spp. and Brevibacterium sp.) capable of metabolizing microcystin-LR (MC-LR) in a Biolog MT2 assay. The work presented here aims to further investigate and evaluate the metabolism and the degradation of multiple microcystins (MC-LR, MC-LF, MC-LY, MC-LW and MC-RR) and nodularin by the bacterial isolates. A total of five bacterial isolates representing the three genera were evaluated using Biolog MT2 assay with a range of MCs where they all demonstrated an overall metabolism on all MCs and NOD. Subsequently, the results were confirmed by observing the degradation of the range of toxins in a separate batch experiment.

scholarly journals Pemanfaatan Jus Buah Merah (Pandanus conoideus) sebagai Feed Additive Untuk Meningkatkan Performa Ayam Broiler Fase Starter

2021 ◽  
Vol 11 (2) ◽  
pp. 172
Author(s):  
Agus Susanto ◽  
Agustinus Gatot Murwanto ◽  
Sri Hartini
Keyword(s):  
Drinking Water ◽  
Water Consumption ◽  
Broiler Chickens ◽  
Fruit Juice ◽  
Drinking Water Treatment ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Water Treatments

Abstract This study aimed to determine the effect of red fruit juice (RFJ) in drinking water on feed consumption, body weight gain (BWG), feed conversion ratio and drinking water consumption of starter broiler chickens. A total of 100 broiler chickens (straight run) of 4 days old (Lohmann) were fed using commercial diets and given RFJ drinking water treatments as followed: P0 = drinking water 1000ml+0ml RFJ, P1=drinking water 900ml+100ml RFJ, P2=drinking water 800ml+200ml RFJ, and P3=drinking water 700ml+300ml RFJ.  During the experiment, the RFJ drinking water treatments were given in a sequential pattern of 3 days ON and 4 days OFF. The results showed that the RFJ drinking water treatments had no effect on feed consumption (P³0.05), but had an effect on BWG (P<0.05), feed conversion ratio (P<0.05), and drinking water consumption (P<0.05). The result of RFJ drinking water treatments on BWG, feed conversion ratio and drinking water consumption had the same pattern, namely the best results were obtained at 200 ml RFJ drinking water treatment and the worst at 300 ml RFJ drinking water treatment. In conclusion, the red fruit juice at a dose of 200 ml in 800 l of drinking water improved the performance of starter broiler chickens, whereas the red fruit juice at a dose of 300 ml in 700 ml of drinking water had no effect on feed consumption but had caused a decrease in the starter broiler chicken’s performance.  Keywords: Body weight gain; Feed conversion ratio; Red fruit juice; Starter broiler chickens   Abstrak  Penelitian bertujuan untuk mengetahui pengaruh pemberian jus buah merah (JBM) dalam air minum terhadap konsumsi ransum, pertambahan bobot badan (PBB), konversi ransum dan konsumsi air minum ayam broiler fase starter. Penelitian menggunakan 100 ekor ayam broiler (unsexing) strain Lohmann umur 4 hari  (BB awal 72,83 gram/ekor ± 1,03 dan CV 0,01) yang diberi pakan ransum komersial ad libitum dan air minum perlakuan JBM sebagai berikut: P0 = air minum 1000ml+0ml JBM, P1= air minum 900ml+100ml JBM, P2= air minum 800ml+200ml JBM, dan P3= air minum 700ml+300ml JBM. Selama penelitian, air minum perlakuan JBM diberikan mengikuti pola berurutan yaitu 3 hari ON dan 4 hari OFF. Hasil penelitian menunjukkan bahwa air minum perlakuan JBM tidak berpengaruh nyata pada konsumsi ransum (P³0,05), tetapi berpengaruh nyata pada PBB (P<0,05)  konversi ransum (P<0,05), dan konsumsi air minum (P<0,05).  Pengaruh perlakuan air minum JBM terhadap PBB, konversi ransum dan konsumsi air minum memperlihatkan hasil dengan pola yang sama yaitu terbaik pada perlakuan air minum JBM 200 ml dan terjelek pada perlakuan air minum JBM 300 ml. Kesimpulan, pemberian jus buah merah pada dosis 200 ml dalam 800 l air minum meningkatkan performa ayam broiler fase starter lebih baik dari perlakuan kontrol, sedangkan pemberian 300 ml jus buah merah dalam 700 ml air tidak berpengaruh pada konsumsi ransum tetapi sudah menyebabkan penurunan performa ayam broiler fase starter lebih rendah dari perlakuan kontrol.   Kata kunci: Ayam broiler fase starter; Jus buah merah; Konversi ransum; Pertambahan bobot badan      

scholarly journals Etude du phénomène de remontée de boue sur le décanteur lamellaire de la station de traitement d’eau de Paspanga au Burkina Faso

2020 ◽  
Vol 14 (2) ◽  
pp. 364-377
Author(s):  
Elisabeth R. Ouedraogo ◽  
Crépin I. Dibala ◽  
Kiessoun Konate ◽  
Jean Diarra ◽  
Mamoudou H. Dicko
Keyword(s):  
Drinking Water ◽  
Burkina Faso ◽  
Gas Production ◽  
Human Needs ◽  
Qualité De L’Eau ◽  
Sont Respectivement ◽  
Two Factors ◽  
Rough Water ◽  
Drinking Water Production ◽  
Water Treatments

L’eau potable, un aliment de base et son accès est l’un des besoins humains fondamentaux. A Ouagadougou, l’eau potable provient du traitement des eaux de surface à Paspanga et à Ziga. Les remontées de boues constituent un phénomène persistant dans les processus de traitement de l’eau à Paspanga. L’objectif de ce travail était de trouver les causes de ce phénomène afin d’optimiser les coûts et taux de production d’eau potable. Pour ce faire, les paramètres physico-chimiques et des essais de traitements de l’eau brute ont été réalisés selon les normes de qualité. Les résultats ont montré que l’eau est potabilisable. En effet, la turbidité, la teneur en matière en suspension et en matière organique sont respectivement en moyenne 116,52 NTU, 10,85 mg/l, 4,72 mg/l d’O2 en mai et 719,13 NTU, 21,07 mg/l, 13,08 mg/l d’O2 de juin à juillet. Le pH de l’eau en mai est faible et en moyenne 6,89 et 7,50 dans les mois de juin à juillet. La mise en évidence de la production de gaz révèle que cette production est progressive. Les remontées de boues sont donc une résultante de deux facteurs : la qualité de l’eau brute et la production de gaz au fond des décanteurs. Mots clés : Décanteur, remontée de boue, traitement, eau   English title: Study of the phenomenon of mud increase on the lamellate decanter of the station of treatment of water of Paspanga in Burkina Faso Drinking water is a basic food and its access is one of the fundamental human needs. For Ouagadougou, it comes from the station of water treatment of surface at Paspanga and Ziga. The mud increase constitutes a persistent phenomenon in the treatments of water of Paspanga. The objective of this work was to find the causes of this phenomenon in order to optimize the costs and rate of drinking water production. To be done, the physicochemical parameters and the tests of rough water treatments were carried out according to standards of quality. The results showed that water is potabilisable. Indeed, the average of turbidity, content of organic matter and suspended matter of water were respectively 116,52 NTU, 10,85 mg/l, 4,72 mg/l of O2 in May and 719,13 NTU, 21,07 mg/l, 13,08 O2 mg/l from June to July. The pH of water varied to 6,89 in May; to 7.50 in June and July. In addition, the results showed that the gas production revealed is progressive over time, which would mean that the mud increased would be a result of two factors: the quality of raw water and the production of gas at the bottom of the decanters. Keywords: Decanter, rising mud, treatment, water

Study on secondary reaction and fate of hazardous chemicals by oxidants

1997 ◽  
Vol 36 (12) ◽  
pp. 325-331 ◽  
Author(s):  
S. J. Kim ◽  
K. H. Oh ◽  
S. H. Lee ◽  
S. S. Choi ◽  
K. C. Lee
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Source ◽  
Treatment Method ◽  
Gas Chromatography Mass Spectrometry ◽  
Drinking Water Source ◽  
Treatment Procedure ◽  
Emergency Control ◽  
Water Treatments ◽  
By Products

The water treatment procedure can lead to the formation of by-products, when the drinking water source is contaminated with trace amounts of organic matter. In this study, the disinfection by-products (DBPs) of trace organic compounds were identified to provide the knowledge on the possible DBPs of the contaminated water during the general or emergent water treatment procedure. Chlorination or ozonation was performed in the laboratory scale under the conditions for the drinking water treatments, and the DBPs of 16 VOCs and 4 phenols were screened using gas chromatography/mass spectrometry (GC/MS). By the chlorination, dichlorobenzene was produced from benzene, ethylbenzene and styrene. 1,2-dichloroethane, 1,2-dichloropropane and phenol produced 1,1,1-trichloroethane, chloroform and chlorophenol, respectively. By the ozonation, bromoform changed to dibromomethane and styrene produced benzaldehyde. Finally, the water treatment method of each classified contaminant group was suggested for the emergency control of contamination.

A review of different drinking water treatments for natural organic matter removal

2015 ◽  
Vol 15 (3) ◽  
pp. 442-455 ◽  
Author(s):  
Yue Zhang ◽  
Xinhua Zhao ◽  
Xinbo Zhang ◽  
Sen Peng
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Biological Treatment ◽  
Treatment Options ◽  
Drinking Water Treatment ◽  
Treatment Processes ◽  
Drinking Water Purification ◽  
Water Treatments

In the past decades, natural organic matter (NOM), which is a complex heterogeneous mixture of organic materials that are commonly present in all surface, ground and soil waters, has had an adverse effect on drinking water treatment. The existence of NOM results in many problems in drinking water treatment processes, and the properties and amount of NOM can significantly affect the efficiency of these processes. NOM not only influences the water quality with respect to taste, color and odor problems, but it also reacts with disinfectants, increasing the amount of disinfection by-products. NOM can be removed from drinking water via several treatment processes, but different drinking water treatment processes have diverse influences on NOM removal and the safety of the drinking water. Several treatment options, including coagulation, adsorption, oxidation, membrane and biological treatment, have been widely used in drinking water purification processes. Therefore, it is of great importance to be able to study the influence of different treatment processes on NOM in raw waters. The present review focuses on the methods, including coagulation, adsorption, oxidation, membrane, biological treatment processes and the combination of different treatment processes, which are used for removing NOM from drinking water.

Drinking Water Treatments for Arsenic and Manganese Removal and Health Risk Assessment in White Rock, Canada

2019 ◽  
Vol 12 (4) ◽  
pp. 793-807 ◽  
Author(s):  
Guangji Hu ◽  
Haroon R. Mian ◽  
Roberta Dyck ◽  
Madjid Mohseni ◽  
Saad Jasim ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Drinking Water ◽  
Health Risk ◽  
Health Risk Assessment ◽  
Manganese Removal ◽  
Water Treatments
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