scholarly journals Investigação de parâmetros físico-químicos e microbiológicos de qualidade da água de poços no município de Sousa-PB para fins de potabilidade

2018 ◽  
Vol 1 (43) ◽  
pp. 88
Author(s):  
Mirelly Alexandre Gomes ◽  
Emanuel Victor Da Silva Ramos ◽  
Luís Carlos Dos Santos ◽  
Damião Júnior Gomes ◽  
Antonio José Ferreira Gadelha
Keyword(s):  
Quality Control ◽  
Chemical Species ◽  
Total Dissolved Solids ◽  
Human Consumption ◽  
Chemical Parameters ◽  
High Concentration ◽  
E Coli ◽  
Septic Tanks ◽  
Physical Chemical ◽  
Artesian Wells

Physicochemical and microbiological analyzes of waters from artesian wells offered to the population of the urban area of Sousa-PB. They were carried out in order to verify the potability and suitability for human consumption, according to parameters established by Ordinance nº 2.914 / 2011 of the Ministry of Health. Due to physical-chemical parameters caused mainly, by the high concentration of total dissolved solids, such as: sodium, bicarbonates and chlorides some samples were considered inadequate. It was observed that these parameters did not change much during the months in which they were monitored, indicating that the alternation between rainy and dry periods does not influence the concentration of these chemical species. In addition, contamination by the presence of total coliforms, thermotolerant and E. coli was also observed in all the wells evaluated, which may be associated with clandestine sewage connections or infiltrations caused by septic tanks. Finally, there is an urgent need for a quality control of the water offered to the population of SousaPB, considering that, the alteration of some parameters can cause damages to human health.

scholarly journals MICROBIOLOGICAL CHARACTERIZATION, ANTIMICROBIAL EFFICACY AND DETERMINATION OF PHYSICAL-CHEMICAL PARAMETERS OF PEGA-PINTO TINCTURE (Boerhavia diffusa L.)

2019 ◽  
Vol 16 (32) ◽  
pp. 774-782
Author(s):  
B. T. M. LIMA ◽  
E. S. CARMO ◽  
F. D. de MEDEIROS ◽  
J. B. P. de SOUZA
Keyword(s):  
Quality Control ◽  
Relative Density ◽  
Antimicrobial Efficacy ◽  
Plate Count ◽  
Chemical Parameters ◽  
Herbal Products ◽  
E Coli ◽  
Physical Chemical ◽  
Organoleptic Characteristics

It is necessary to adopt a quality control system that guarantees reliability in relation to herbal products, especially in the consumer market, giving them security, efficiency and quality. Thus, the present study aimed to characterize parameters for quality control of pega-pinto root tincture produced at the Home Remedies Manufactory linked to the Center for Popular Education (CENEP), located in the city of Nova Palmeira-PB. For this, organoleptic characteristics (color and odor) were observed and the microbiological and physicochemical tests were carried out according to the specifications of the Brazilian Pharmacopoeia (2010). The determination of the total number of mesophilic microorganisms was performed by the plate count method in depth, the pathogen search aimed at the detection of Escherichia coli, Salmonella and Staphylococcus aureus using selectives culture mediums and the antimicrobial efficacy was given by the method of diffusion in agar versus E. coli. Characteristic constituents were determined by phytochemical tests, pH, relative density and solid residue were checked. Pega-pinto tincture showed yellowish coloration, characteristic soft odor, presence of particles in suspension and formation of precipitate. Count values of the total number of mesophilic microorganisms varied from 2.0 x 102 to 1.1 x 103 CFU/mL for bacteria, and 1.6 x 102 to 5.3 x 102 for fungi. None of the microorganisms surveyed was identified, indicating absence of E. coli, S. aureus and Salmonella. No inhibition of E. coli was observed in antimicrobial efficacy assays. The presence of phenolic compounds, alkaloids, and a slightly positive reaction to tannins was evidenced. The physical-chemical parameters were pH 5.69, relative density 0.93 mg/mL and dry residue 2.86%. Thus, compliance with the pharmacopoeia microbial limits was observed and, although it did not show efficacy against E. coli, the values of physic-chemical parameters are similar to those of other tinctures, being described for the first time for the tincture of pega-pinto.

Groundwater and soil CO2 efflux weekly monitoring network for the surveillance of Cumbre Vieja volcano, Canary Islands

2020 ◽  
Author(s):  
Cecilia Amonte ◽  
Alana Mulliss ◽  
Elizabeth Sampson ◽  
Alba Martín-Lorenzo ◽  
Claudia Rodríguez-Pérez ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Monitoring Program ◽  
Monitoring Network ◽  
Volcano Monitoring ◽  
Co2 Efflux ◽  
Chemical Parameters ◽  
High Concentration ◽  
Average Value ◽  
Physical Chemical ◽  
Cumbre Vieja

<p>La Palma Island (708.32 km<sup>2</sup>) is located at the north-western end of the Canary Archipelago and is one of the youngest of the archipelago. In the last 123 ka, volcanic activity has taken place exclusively at Cumbre Vieja, the most active basaltic volcano in the Canaries, which is located at the southern part of the island. Since no visible geothermal manifestations occur at the surface environment of this volcano, during the last 20 years there has been considerable interest in the study of diffuse degassing as a powerful tool in the volcano monitoring program. In this study we have used two different geochemical approaches for volcano monitoring from October 2017 to November 2019. First, we have developed a network of 21 closed static chambers to determine soil CO<sub>2</sub> effluxes. Additionally, we have monitored physical-chemical parameters (temperature, pH, electrical conductivity -EC-) and chemical/isotopic composition and dissolved gases in the water of two galleries (Peña Horeb and Trasvase Oeste) and one water well (Las Salinas). Soil CO<sub>2</sub> effluxes for the alkaline traps showed an average value of 7.4 g·m<sup>-2</sup>·d<sup>-1</sup> for the entire Cumbre Vieja volcano. The gas sampled on the head space of the traps can be considered as CO<sub>2</sub>-enriched air, showing an average value of 1,942 ppmV of CO<sub>2</sub>. Regarding the CO<sub>2</sub> isotopic composition (δ<sup>13</sup>C-CO<sub>2</sub>), most of the stations exhibited CO<sub>2</sub> composed by different mixing degrees between atmospheric and biogenic CO<sub>2</sub> with slight contributions of deep-seated CO<sub>2</sub>, with an average value of -19.3‰. The results of the physical-chemical parameters measured in waters showed mean temperature values of 23.7ºC, 19.6ºC and 22.1ºC, 7.40, 6.27 and 6.60 for the pH and 1,710 µS·cm<sup>-1</sup>, 411 µS·cm<sup>-1</sup> and 41,100 µS·cm<sup>-1</sup> for the EC, for Peña Horeb, Trasvase Oeste and Las Salinas, respectively. The δ<sup>13</sup>C-CO<sub>2</sub> composition of the dissolved gas has a mean value of -7.8‰, -10.2‰ and -3.8‰ vs. VPDB for Peña Horeb, Trasvase Oeste and Salinas, respectively. The highest values of CO<sub>2</sub> efflux coincided with the stations showing highest CO<sub>2</sub> concentration values located at the southern end of Cumbre Vieja, where the most recent volcanic eruption took place, and also on the northwest flank. This is in accordance with the results obtained for Las Salinas well, located in the south of the island, which show a high concentration of dissolved CO<sub>2</sub> and δ<sup>13</sup>C-CO<sub>2</sub> values with a strong deep-seated CO<sub>2</sub> contribution. This study represents an interesting contribution to detect early warning signals of future unrest episodes at Cumbre Vieja.</p>

Quality of drinking water of Kosti city, White Nile State, Sudan, collected during February 2021

2021 ◽  
Vol 2 (2) ◽  
pp. 032-036
Author(s):  
Abdelaal Ali Hammad Ali ◽  
Mutaman Ali A. Kehail ◽  
Mazahir Elhadi Abdallah Mohammed
Keyword(s):  
Drinking Water ◽  
Total Dissolved Solids ◽  
Waterborne Diseases ◽  
Standard Methods ◽  
E Coli ◽  
Physical Chemical ◽  
Routine Work ◽  
Sanitation And Hygiene ◽  
White Nile

Lack of clean water supply, sanitation and hygiene are major causes for the spread of waterborne diseases in a community. This study was conducted, to determine the quality of drinking water collected from Kosti City, White Nile State, Sudan. In this study, the quality levels of drinking water (physical, chemical and the microbial), were determined following the standard methods. Five sites were selected to sampling drinking water during Feb. 2021. The results showed that, some of pH, HCO3-, Hardness, SO-, Na+ and Ca++ values were not fall within the standard ranges. Total Dissolved Solids (TDS), Cl and K+ data agreed with standard ranges. CO3 show a very strong +ve correlation (0.99) with Na and -ve correlation (-0.98) with HCO3. E. coli were relatively high in comparison to standards (which should be zero). The study recommends evaluating the quality of the drinking water, and this should be routine work.

The Effect of Estuary Type Suspended Solids on Survival of E. coli in Saline Waters

1989 ◽  
Vol 21 (3) ◽  
pp. 61-65 ◽  
Author(s):  
D. P. Milne ◽  
J. C. Curran ◽  
J. S. Findlay ◽  
J. M. Crowther ◽  
S. G. Wallis
Keyword(s):  
Survival Time ◽  
Laboratory Experiments ◽  
Suspended Solids ◽  
Salinity Range ◽  
Survival Times ◽  
Chemical Parameters ◽  
Additional Increase ◽  
E Coli ◽  
Physical Chemical ◽  
Solids Concentration

The effect of estuary type suspended solids on E.coli inactivation has been examined in laboratory experiments. The work used artificial seawater, laboratory processed suspended solids and chemostat steady-state E.coli cultures to establish the effect of these physical/chemical parameters on the viability of an E.coli population. Initial E.coli concentrations were 5 × 103. 100ml−1, the temperatures employed were 10°C and 20°C, the suspended solids concentration range was 0 – l00mgl−1, salinity range 10 – 32%o, and the experimental vessels were completely shielded from light. The introduction of suspended solids at a low concentration (ie 5mgl−1) markedly increased the survival time of E.coli at the higher salinities (ie 32% o and 27%o). Suspended solids at higher concentrations (>12.5mgl−1) provided no additional increase in survival time. At low suspended solids concentrations (≤5mgl−1) decreasing salinity increased survival time; at higher suspended solids concentration (>12.5mgl−1) salinities in excess of a critical value, around 27%o, also increased survival times.

Submikroninių aerozolio dalelių kilmės ir fizikinių-cheminių parametrų įtaka atmosferos šiluminei pusiausvyrai

2020 ◽  
Author(s):  
◽  
Julija Pauraitė-Dudek
Keyword(s):  
Chemical Parameters ◽  
Radiative Balance ◽  
Submicron Aerosol ◽  
Physical Chemical ◽  
The Impact ◽  
Aerosol Source

The impact of submicron aerosol source and physical-chemical parameters on atmospheric radiative balance

Dry and storm weather transport of coliforms and faecal streptococci in combined sewage

1995 ◽  
Vol 31 (7) ◽  
pp. 311-320 ◽  
Author(s):  
R. M. Ashley ◽  
W. Dabrowski
Keyword(s):  
Data Collection ◽  
Coliform Bacteria ◽  
Pathogenic Microorganisms ◽  
Chemical Parameters ◽  
Physical Chemical ◽  
Sediment Bacteria ◽  
Wet Weather ◽  
Faecal Streptococci

Combined sewage coliform bacteria are important as indicators of pathogenic microorganisms and of their possible discharge into the environment. Whilst specifying limits for viruses, most legislation recognises the difficulty of enumerating such organisms and also prescribes limits for coliforms. Despite the importance of these organisms, little is known about their numbers and behaviour in sewerage systems. A data collection programme is described which has monitored dry and wet weather sewage coliform bacteria and also sediment bacteria. These data are used to review recent UK recommendations for assessing bacteria numbers in storm discharges. It is concluded that relationships between bacteria numbers and other physical/chemical parameters may be developed during DWF, but are seasonally and catchment dependent. Extension of DWF measurements to predict storm bacteria may be possible with more data.

Management of Dairy Waste in the Sonoran Desert Using Constructed Wetland Technology

1999 ◽  
Vol 40 (3) ◽  
pp. 57-65 ◽  
Author(s):  
Martin M. Karpiscak ◽  
Robert J. Freitas ◽  
Charles P. Gerba ◽  
Luis R. Sanchez ◽  
Eylon Shamir
Keyword(s):  
Sonoran Desert ◽  
Suspended Solids ◽  
Waste Treatment ◽  
Oxygen Demand ◽  
Dairy Wastewater ◽  
Chemical Parameters ◽  
Treatment Facility ◽  
Physical Chemical ◽  
Scirpus Validus ◽  
Surface Wetland

An integrated wastewater treatment facility, consisting of upper (solids separators, anaerobic lagoons, and aerobic ponds) and lower (wetland cells) subsystems, has been built to replace the lagoon at a dairy in Arizona, USA. The collection sump of the new waste treatment facility collects all dairy wastewater outflow. Wastewater is then pumped to solids separators, and flows by gravity to anaerobic ponds and aerobic ponds. The upper subsystem is expected to treat the water sufficiently so that the wetland cells may achieve further pollutant reductions. The lower subsystem, comprised of 8 surface wetland cells with an approximate surface area of 5,000 m2, receives outflow from the ponds. The cells are planted with cattail (Typha domingensis), soft-stem bulrush (Scirpus validus), and reed (Phragmites australis). After treatment is completed via the lagoons and ponds followed by the wetland cells, the wastewater can be reused to flush barns or to irrigate crops. Performance of the overall system is evaluated by measuring physical, chemical and biological parameters in water samples taken from selected locations along the treatment system. Chemical parameters studied include biochemical oxygen demand, pH, total suspended solids, nitrogen species. Biological monitoring included coliforms (total and fecal) and Listeria monocytogenes.

Occurrences of Giardia cysts in beach water

1998 ◽  
Vol 38 (12) ◽  
pp. 73-76 ◽  
Author(s):  
B. S. W. Ho ◽  
T.-Y Tam
Keyword(s):  
Health Risk ◽  
Water Sample ◽  
Water Samples ◽  
High Concentration ◽  
Potential Health ◽  
Infectious Dose ◽  
Potential Health Risk ◽  
E Coli ◽  
Beach Water ◽  
Giardia Cysts

A total of 64 beach water samples with various bacteriological quality (Grades 1 to 4) were analysed for their bacteriological and parasitological contents (E coli and Giardia cysts respectively). Results indicated that Giardia cysts were detected in less than 10% of the Grade 1 beach water samples with E coli concentrations of <24/100mL. For Grades 2, 3 & 4 beach water samples, Giardia cysts were found, respectively, in 85, 50 and 64% of the samples. Except for one beach water sample which had an unusually high concentration of Giardia cysts (23 cysts/L), they were generally present at moderate concentrations (<10 cysts/L) in all other beach water samples. Despite moderate levels of Giardia cysts present in beach water of different grades, the potential health risk faced by swimmers bathing in local beach water needs to be carefully assessed as Giardia is known to have a low infectious dose.

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