Bioavailability of phosphorus in purified municipal wastewaters

Ekholm, Petri; Krogerus, Kirsti

doi:10.1016/s0043-1354(97)00248-0

Cited by 51 publications

(19 citation statements)

References 6 publications

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“…These values were clearly above the standard limit (0.1 mg/L) of the US Public Health Standards (Solaraj et al 2010) in water systems that will not encourage the growth of algae and other plants. Since municipal wastewater contains substantial amount of phosphorus contributed by human urine and detergents (Ekholm and Krogenus 1998), disposal of municipal sewage into the river may account for the observed trend in spring. Because spring season was dry compared to other seasons, the dilution effect on the sewage disposed into the river could have been less in this season, hence the higher concentrations of nutrients in this season than in other seasons.…”

Section: Resultsmentioning

confidence: 99%

Characterisation of the physicochemical qualities of a typical rural-based river: ecological and public health implications

Sibanda

Chigor

Koba

et al. 2013

Int. J. Environ. Sci. Technol.

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The physicochemical qualities of a typical rural-based river were assessed over a 12-month period from August 2010 to July 2011 spanning the spring, summer, autumn and winter seasons. Water samples were collected from six sampling sites along Tyume River and analysed for total nitrogen, orthophosphate, biochemical oxygen demand (BOD), temperature, pH, dissolved oxygen (DO), electrical conductivity (EC), total dissolved solids (TDS) and turbidity. BOD regimes did not differ significantly between seasons and between sampling points and ranged from 0.78 to 2.76 mg/L across seasons and sampling points, while temperature ranged significantly (P \ 0.05) between 6 and 28°C. Turbidity varied significantly (P \ 0.05) from 6 to 281 nephelometric turbidity units while TDS (range 24-209 ppm) and conductivity (range 47.6-408 mg/L) also varied significantly (P \ 0.05) across sampling points with a remarkable similarity in their trends. Orthophosphate concentrations varied from 0.06 to 2.72 mg/L across seasons and sampling points. Negative correlations were noted between temperature and the nutrients, DO and temperature (r = -0.56), and TDS and DO (r = -0.33). Positive correlations were noted between TDS and temperature (r = 0.41), EC and temperature (r = 0.15), and DO and pH (r = 0.55). All nutrients were positively correlated to each other. Most measured parameters were within prescribed safety guidelines. However, the general trend was that water quality tended to deteriorate as the river flows through settlements, moreso in rainy seasons.

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Section: Resultsmentioning

confidence: 99%

Characterisation of the physicochemical qualities of a typical rural-based river: ecological and public health implications

Sibanda

Chigor

Koba

et al. 2013

Int. J. Environ. Sci. Technol.

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“…Concentrations of total phosphate in the water samples exceeded the standard limit (0.1 mg/l) of the US Public Health Standards (Solaraj et al 2010) at 11 of the 12 sites. It has been documented (Ekholm and Krogenus 1998) that municipal wastewater contains substantial amount of phosphorus contributed by human urine and detergents. This may account for the significantly higher phosphate concentrations observed at Samaru stream, which is heavily affected by municipal sewage.…”

Section: Resultsmentioning

confidence: 99%

Water quality assessment: surface water sources used for drinking and irrigation in Zaria, Nigeria are a public health hazard

Chigor

Umoh

Okuofu

et al. 2011

Environ Monit Assess

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We assessed the quality and pollution status of source surface waters in Zaria, Nigeria by monitoring the nature, cause and extent of pollution in Samaru stream, Kubanni River and Kubanni dam over a period of 10 months, between March and December 2002. A total of 228 water samples was collected from 12 sites and analysed for a total of ten physicochemical and one bacteriological quality indicators, using standard methods. Aesthetic water quality impairment parameters were also observed. The mean values of most water quality parameters were significantly higher (P < 0.05) in both the stream and river than in the dam. There was no significant correlation between faecal coliform counts (FCC) and water temperature (in the range 15-33°C); pH (5.77-7.32); and turbidity (1.4-567 NTU). The high FCC ranged from 2.0 × 10(1) to 1.6 × 10(6) MPN/100 ml and exceeded the WHO standards for drinking water and water used for fresh-produce irrigation, and correlated positively (P < 0.05) with conductivity (in the range 68-1,029 μS/cm); TDS (10.0-70.0 mg/l); TSS (10.0-70.0 mg/l); Cl (7.5-181 mg/l); PO(4)(-) P (0.01-0.41 mg/l); NO(3)(-) N (0.6-3.8 mg/l) and BOD(5) (0.1-14.9 mg/l). The main pollution sources were municipal wastewater, stormwater runoffs, the ABU sewage treatment plant, abattoir effluents and irrigation farms treated with chemical fertilisers. We conclude that these water bodies are potentially hazardous to public health and that proper sewage treatment and river quality monitoring are needed to warn against hazards to public health.

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“…The sites influenced by agriculture and domestic sewage (sites I, II, and III) showed high TP concentrations during all the year, with relatively high values in spring and summer and low values in autumn and winter. It has been documented by [74] that municipal wastewater contains substantial amount of phosphorus contributed by human urine and detergents. Increased concentration of phosphorus and NO 3 -N in lakes has resulted in enhanced productivity elevating oxygen demand in turn [46,75].…”

Section: Mak Vin Ash Wat Nin Spr Sum Aut Winmentioning

confidence: 99%

Surface Water Quality Assessment of Wular Lake, A Ramsar Site in Kashmir Himalaya, Using Discriminant Analysis and WQI

Bhat

Pandit

2014

Journal of Ecosystems

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Multivariate techniques, discriminant analysis, and WQI were applied to analyze a water quality data set including 27 parameters at 5 sites of the Lake Wular in Kashmir Himalaya from 2011 to 2013 to investigate spatiotemporal variations and identify potential pollution sources. Spatial and temporal variations in water quality parameters were evaluated through stepwise discriminant analysis (DA). The first spatial discriminant function (DF) accounted for 76.5% of the total spatial variance, and the second DF accounted for 19.1%. The mean values of water temperature, EC, total-N, K, and silicate showed a strong contribution to discriminate the five sampling sites. The mean concentration of NO 2 -N, total-N, and sulphate showed a strong contribution to discriminate the four sampling seasons and accounted for most of the expected seasonal variations. The order of major cations and anions was Ca 2+ > Mg 2+ > Na + > K + and Cl − > SO4 2− > SiO 2 2− respectively. The results of water quality index, employing thirteen core parameters vital for drinking water purposes, showed values of 49.2, 46.5, 47.3, 40.6, and 37.1 for sites I, II, III, IV, and V, respectively. These index values reflect that the water of lake is in good condition for different purposes but increased values alarm us about future repercussions.

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Bioavailability of phosphorus in purified municipal wastewaters

Cited by 51 publications

References 6 publications

Characterisation of the physicochemical qualities of a typical rural-based river: ecological and public health implications

Characterisation of the physicochemical qualities of a typical rural-based river: ecological and public health implications

Water quality assessment: surface water sources used for drinking and irrigation in Zaria, Nigeria are a public health hazard

Surface Water Quality Assessment of Wular Lake, A Ramsar Site in Kashmir Himalaya, Using Discriminant Analysis and WQI

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