Stripping and rival procedures for surgical treatment of truncal varicosity

Hach, W.; Hach-Wunderle, V.

doi:10.1007/s007720050178

Cited by 18 publications

(15 citation statements)

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“…The result was of NH 4 + concentration in N contents in the water was obtained after the calculation with the ammonia SCF (1.288), NH 4 + = X × 1.288 mg/L. X, X and X was the number read on the spectrophotometer DR/2000 during each specific measure; the results presented in this paper are the average for each components recorded upon the experiments [37]. On site at the International Institute for Water and Environmental Engineering (2iE) of Ouagadougou, with the HACH process, the dissolved total iron content of the water sample was determined by the FerroVer Method (Powder Pillows), wavelength 510 nm and the detection ranges were between 0 and 3.00 mg/L.…”

Section: Chemical Reagentsmentioning

confidence: 99%

Relevant impact of irradiance (vs. dose) and evolution of pH and mineral nitrogen compounds during natural water disinfection by photo-Fenton in a solar CPC reactor

Ndounla

Kenfack

Wéthé³

et al. 2014

Applied Catalysis B: Environmental

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a b s t r a c tThe inactivation of total coliforms/E. coli (10 4 CFU/mL) and Salmonella spp. (10 5 CFU/mL) in well water naturally containing dissolved (Fe 2+/3+ ) and solid iron forms (e.g. iron oxides) was carried out by photo Fenton treatment (Fe 2+, 3+ /H 2 O 2 /hv). In a preliminary run under simulated solar radiation, beyond 4 mg/L of added H 2 O 2 , the enteric bacteria were totally inactivated after 90 min. Thereafter, 25 L of well water were treated in the compound parabolic collector (CPC) under direct solar radiation. Three irradiation periods (i) 8 am to 2 pm (8-14 h), (ii) 10 am to 4 pm (10-16 h) and (iii) 12 pm to 6 pm (12-18 h) were evaluated for assessing the impact of different solar irradiances (W m −2 ) on the enteric bacterial inactivation rates. Both studied strains were totally inactivated under sole exposure to solar radiation in the CPC when the experiments were conducted from 8 to 14 h or 10 to 16 h. However, Salmonella spp. strains regrowth was noticed after the 24 h dark storage in all the samples previously treated with bare solar radiation. As the treated water contained Fe, the photo-Fenton disinfection at field scale in the CPC was carried out with the addition of H 2 O 2 (10 mg/L). Significant enhancement of the enteric bacteria inactivation rate was therefore recorded comparatively to the one obtained under bare solar treatment. No regrowth was observed in water treated by photo-Fenton disinfection one week after the treatment. The comparative evaluation of photo-Fenton disinfection rate as a function of different irradiation periods was based on the monitoring of the effective disinfection time (EDT), or required time to acquire the total inactivation of targeted bacteria in defined conditions. Therefore, significant impact of the irradiance on the process was noticed. High average irradiance (AI) of 35 W m −2 led to the total inactivation of Salmonella spp. in an EDT of 45 min and a dose of 26 Wh m −2 ; while low irradiance of 20 W m −2 required an EDT of 180 min for a dose 60 Wh m −2 . Thus, the experiments revealed that lower irradiance level leads to higher doses to achieve the bacterial disinfection. pH, as well as nitrite and nitrate concentration, increased during the photo-disinfection processes, while depletion was recorded for aqueous ammonia concentration.

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Section: Chemical Reagentsmentioning

confidence: 99%

Relevant impact of irradiance (vs. dose) and evolution of pH and mineral nitrogen compounds during natural water disinfection by photo-Fenton in a solar CPC reactor

Ndounla

Kenfack

Wéthé³

et al. 2014

Applied Catalysis B: Environmental

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“…a/ Analyses other than those listed in this (Hach, 2002) and the HACH Digital Titrator Manual, Model 16900, Revision 4 (Hach, 2000), as applicable. c/ Parameters used to establish ground-water quality stabilization during well development commonly include pH, specific conductance, temperature, and turbidity.…”

Section: Notesmentioning

confidence: 99%

Implementing Monitored Natural Attenuation and Expediting Closure at Fuel-Release Sites

Brauner¹,

Downey²,

Hicks³

et al. 2004

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS.

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“…By using HACH spectrophotometer, total nitrogen (TN), total phosphorus (TP) and potassium (K) were analyzed using Persulfate digestion method, Phosver3 (ascorbic acid) method, and Tetraphenylborate method, respectively. The procedures were based on the HACH standard [19]. All the units of concentration were in mg/L except for pH.…”

Section: A Analytical Methodsmentioning

confidence: 99%

Nutrients Reclamation using Modified Membrane to Provide Added Value to the Kenaf Retted Wastewater

2016

IJRCMCE

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Abstract-Kenaf retted wastewater (KRW) currently contributed to water pollution problem through retting process due to increasing in demand of fiber among fibers industries. Directly discharge of nutrient-rich retting water into water body can cause eutrophication and initiated a rapid algal bloom. The aim of this study is to provide the added-value for KRW by reclamation of nutrients using modified membrane. The experiment was carried out in a filtration system using modified membrane, PVP1.5 (14.8 wt. % Polysulfone (PSF)/ 83.7 wt. % N-Dimethylacetamide (DMAC)/ 1.5 wt. % Polyvinyl-pyrrolidone (PVP)) as medium of filtration. It is observed that the modified membrane efficiently reclaiming more than 90 % of total nitrogen (TN), nearly to 90 % of total phosphorus (TP) and above 85 % potassium (K) from KRW and it successfully produced the effluent that meet the effluent standard which can be disposed into the nature at a safe level. Therefore, it is found that reclamation of nutrients from KRW using this modified membrane is one of the profitability techniques for Malaysia kenaf industries because of nutrients from 10 thousand hectares of land per season of kenaf planting is estimated able to be reclaimed as much as 126 thousand kg/L TN, 68 thousand kg/L TP and nearly 2 million kg/L K. From this study, KRW has the potential to be converted into a useful product with added value and provide the added value for KRW.

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Stripping and rival procedures for surgical treatment of truncal varicosity

Cited by 18 publications

References 0 publications

Relevant impact of irradiance (vs. dose) and evolution of pH and mineral nitrogen compounds during natural water disinfection by photo-Fenton in a solar CPC reactor

Relevant impact of irradiance (vs. dose) and evolution of pH and mineral nitrogen compounds during natural water disinfection by photo-Fenton in a solar CPC reactor

Implementing Monitored Natural Attenuation and Expediting Closure at Fuel-Release Sites

Nutrients Reclamation using Modified Membrane to Provide Added Value to the Kenaf Retted Wastewater

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