scholarly journals Auspicious water treatment approach. Oxidative degradation of fluconazole and voriconazole antibiotics by CrO3 in different acidic environments: Kinetics, mechanistic and thermodynamic modelling

2021 ◽  
pp. 101396
Author(s):  
Ahmed Fawzy ◽  
Nada Alqarni ◽  
Belal El-Gammal ◽  
Arafat Toghan ◽  
Nasser A. Hassan ◽  
...  
Keyword(s):  
Water Treatment ◽  
Treatment Approach ◽  
Oxidative Degradation ◽  
Thermodynamic Modelling ◽  
Acidic Environments

The potential of a semi-decentralised bulk water treatment approach for emergency relief

2014 ◽  
Vol 4 (4) ◽  
pp. 709-713 ◽  
Author(s):  
Caetano C. Dorea ◽  
Vincent Jalaber
Keyword(s):  
Water Treatment ◽  
Treatment Approach ◽  
Bulk Water ◽  
Emergency Relief ◽  
Humanitarian Emergencies ◽  
Test Water ◽  
Point Of Use ◽  
Household Water ◽  
Synthetic Test ◽  
Relief Operations

Humanitarian water treatment interventions vary from package bulk ‘kits’ to household (point-of-use) options. Whereas the former can be perceived to be too complex to operate, the latter, whilst relatively simple and effective, has logistical requirements that may hinder its application during relief operations. This study evaluates the potential of a semi-decentralised water treatment approach for humanitarian emergencies. Its performance was evaluated against the relevant water quality treatment objectives (The Sphere Project) under controlled laboratory conditions using a synthetic test water. Results revealed that whilst the recommended minimum free chlorine residual levels were not attained (possibly due to high chlorine demand of test water), all other treatment objectives were within desired values, namely: <1 colony-forming unit (cfu)/100 mL with regards to thermotolerant (faecal) coliforms and <5 NTU (nephelometric turbidity units) for treated water turbidity. Given the performance of the semi-decentralised approach tested here, it could be expected to attain all treatment objectives when tested in natural surface waters. It has the potential to bridge the gap between centralised (i.e. bulk water treatment kits) and fully decentralised (i.e. household) water supply strategies.

The effect of hot-water treatment on the thermo-oxidative degradation of polycaproamide fibres

1972 ◽  
Vol 3 (4) ◽  
pp. 343-347
Author(s):  
A. P. Lisitsyn ◽  
V. Ya. Efremov ◽  
T. N. Kashina ◽  
N. V. Mikhailov
Keyword(s):  
Water Treatment ◽  
Oxidative Degradation ◽  
Hot Water ◽  
Hot Water Treatment ◽  
Thermo Oxidative Degradation

scholarly journals Cooperative Versus Individual Approaches to Treatment of Contaminated Groundwater by Rural Residents in the Northeast

1989 ◽  
Vol 18 (1) ◽  
pp. 52-57 ◽  
Author(s):  
Deborah K. Klinko ◽  
Charles W. Abdalla
Keyword(s):  
Water Treatment ◽  
Treatment Approach ◽  
Mail Survey ◽  
Contaminated Groundwater ◽  
Quantity Discounts ◽  
Rural Residents ◽  
Maintenance Costs ◽  
Point Of Entry ◽  
Point Of Use ◽  
Private Wells

Point-of-use/point-of-entry treatment can provide an affordable means for rural residents on private wells to remedy groundwater contamination. Cooperation among homeowners was hypothesized to be a means of further reducing treatment costs due to quantity discounts and avoidance of dealer mark-ups. Data obtained through a mail survey of water treatment firms was used to test this hypothesis. Individual and group purchase, installation and maintenance costs and manufacturer and dealer costs were compared using analysis of variance. Results indicate a cooperative treatment approach may provide benefits due to quantity discounts but little potential exists for savings via direct manufacturer purchase.

scholarly journals TAML/H2O2 Oxidative Degradation of Metaldehyde: Pursuing Better Water Treatment for the Most Persistent Pollutants

2016 ◽  
Vol 50 (10) ◽  
pp. 5261-5268 ◽  
Author(s):  
Liang L. Tang ◽  
Matthew A. DeNardo ◽  
Chakicherla Gayathri ◽  
Roberto R. Gil ◽  
Rakesh Kanda ◽  
...  
Keyword(s):  
Water Treatment ◽  
Oxidative Degradation ◽  
Persistent Pollutants

scholarly journals Effect of container geometry on colloids removal from water in oscillation-based flocculation

2019 ◽  
Vol 20 (1) ◽  
pp. 328-334
Author(s):  
Eran Halfi ◽  
Asher Brenner ◽  
David Katoshevski
Keyword(s):  
Water Treatment ◽  
Removal Efficiency ◽  
Conventional Treatment ◽  
Treatment Approach ◽  
Cylindrical Vessel ◽  
Cylindrical Container ◽  
Water Treatment Plants ◽  
Rectangular Container ◽  
Flow Manipulation ◽  
Positive Results

Abstract Colloid removal in water treatment plants is commonly done by a sequence of processes that includes coagulation, flocculation, sedimentation, and filtration. The current study presents an innovative technique, termed grouping, for the removal of these suspended particles based on physical flow manipulation, which causes the particles to aggregate. Previous results showed that gentle oscillation in a cylindrical container facilitates simultaneous flocculation and sedimentation in the same reactor over shorter periods of time than are possible using the conventional treatment approach. This finding may confer marked improvements on the processes used today by enabling the use of both smaller reactors and less energy. Based on the findings with the cylindrical vessel, here the grouping technique is further examined in a rectangular container and over a range of different initial turbidities. The results indicate that the removal efficiency is higher in the rectangular container under the different initial turbidities tested. In addition, the removal efficiency was shown to remain robust with the decreases in initial turbidity and alum concentrations that occur during treatment. The positive results of our previous study taken together with this finding hint at the strong potential of the grouping technique to improve common flocculation processes.

Research Progress of Advanced Oxidation Water Treatment Technology

2021 ◽  
pp. 1-47
Author(s):  
Y. Sun
Keyword(s):  
Water Treatment ◽  
Industrial Development ◽  
Degradation Mechanism ◽  
Rapid Development ◽  
Oxidative Degradation ◽  
Advanced Oxidation ◽  
Development Trend ◽  
Practical Significance ◽  
Treatment Technology ◽  
Treatment And Disposal

The rapid development of the industry has brought environmental deterioration. The contradiction between industrial development and environmental protection has become increasingly prominent. How to degrade various complex pollutants in water effectively is one of the keys to solve this contradiction. Reasonable treatment and disposal of pollutants to make them harmless to the environment has important practical significance. Advanced oxidation Processes (AOPs) has been gradually applied in the field of water treatment due to its advantages of high treatment efficiency, strong oxidation intensity, no secondary pollution and its capacity to degrade varieties of organic pollutants from wastewater. The oxidative degradation mechanism of AOPs was analyzed in this paper. The future development trend of the advanced oxidation technology was prospected, and the best treatment method for water treatment technologies was sought.

Productivity of Emerging Word Combinations in Toddlers With Specific Expressive Language Impairment

1997 ◽  
Vol 6 (4) ◽  
pp. 34-47 ◽  
Author(s):  
Steven H. Long ◽  
Lesley B. Olswang ◽  
Julianne Brian ◽  
Philip S. Dale
Keyword(s):  
Data Collection ◽  
Young Children ◽  
Language Impairment ◽  
Treatment Approach ◽  
Expressive Language ◽  
Semantic Consistency ◽  
Session Analysis

This study investigated whether young children with specific expressive language impairment (SELI) learn to combine words according to general positional rules or specific, grammatic relation rules. The language of 20 children with SELI (4 females, 16 males, mean age of 33 months, mean MLU of 1.34) was sampled weekly for 9 weeks. Sixteen of these children also received treatment for two-word combinations (agent+action or possessor+possession). Two different metrics were used to determine the productivity of combinatorial utterances. One metric assessed productivity based on positional consistency alone; another assessed productivity based on positional and semantic consistency. Data were analyzed session-by-session as well as cumulatively. The results suggest that these children learned to combine words according to grammatic relation rules. Results of the session-by-session analysis were less informative than those of the cumulative analysis. For children with SELI ready to make the transition to multiword utterances, these findings support a cumulative method of data collection and a treatment approach that targets specific grammatic relation rules rather than general word combinations.

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