Evaluation of point-of-use drinking water treatment systems’ performance and problems

Fahiminia, Mohammad; Mosaferi, Mohammad; Taadi, Reza A.; Pourakbar, Mojtaba

doi:10.1080/19443994.2013.797669

Cited by 15 publications

(5 citation statements)

References 19 publications

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“…The results of this study agreed on these findings. According to Fahiminia et al results, the average concentration of magnesium, calcium, total hardness and fluoride of the samples were 0.9, 5.7, 60 and 0.05 mg/L respectively [12] which regarding to the TH standard (above 500 mg/L in DW) is considered to be aesthetically unsuitable [29].…”

Section: Discussionmentioning

confidence: 99%

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Qualitative and health-related evaluation of point-of-use water treatment equipment performance in three cities of Iran

Rezaeinia

Nasseri

Binesh

et al. 2018

J Environ Health Sci Engineer

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Background Application of the point-of-use water treatment (POU-WT) systems has consistently increased during the last decade in Iran. In this study, the qualitative performances of reverse osmosis-based POU devices in selected cities of Iran were investigated. Methods This applied- descriptive study was conducted in three cities of Tehran, Rasht, and Ahvaz in 2016 (selected based on the level of POU devices sale index in three phases). After choosing the most popular five brands of six stages POU devices, 360 water sampling zones and POU consumer households of the selected cities were measured. Also, the awareness of the consumers about POU-WT systems selection and performance was investigated through a designed questionnaire. Results The qualitative parameters in the three cities were acceptable ( p < 0.05) for tap water (except for EC in Ahvaz), the output water were as follows: pH = 6.05–7.5, EC = 49.8–58.2 μs/cm, TOC = 0.01–0.23 mg/L and Nitrate = 0.52–4.5 mg/LNO 3 (lower or within the range of regulatory limits), Total Hardness = 33–41.5 mg/L and Fluoride = 0.01–0.23 mg/L (which were lower than the admissible limit, with p < 0.05), HPC values were in the range of 543–676 CFU/mL, which exceeded the regulatory level. Results of ANOVA analysis showed significant differences between the selected cities. The results of the questionnaire survey showed that the dissatisfaction of tap water quality and health-related concerns were the two main reasons for household POU-WT systems; awareness levels of 64% of these households about the performances of their POU systems were weak. Also, social media were mostly used by POU-WT users for brand selected. Conclusion Based on the results of the tap-water quality application of POU-WT systems are not recommended in Tehran and Rasht, and regarding the outputs of these systems, side effects of softened water, lack of Fluoride and a remarkable increase of the number of bacteria should be considered. In Ahvaz, application of POU-WT systems can decrease the health-related problems and it is necessary to increase the access to read POU-WT efficiency information for the consumers.

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Section: Discussionmentioning

confidence: 99%

“…Fahiminia et al [12]. Analyzed the data from 240 water samples in the input and output of different POU-WT systems in Iran and concluded that these systems were able to decrease the dissolved solids more than 90% and produce soft water.…”

Section: Introductionmentioning

confidence: 99%

Qualitative and health-related evaluation of point-of-use water treatment equipment performance in three cities of Iran

Rezaeinia

Nasseri

Binesh

et al. 2018

J Environ Health Sci Engineer

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“…Spatial distribution of arsenic levels in the city, on one hand, and its water distribution network map, using GIS (Geographic Information System), on the other can provide an appropriate perspective for decision making and treatment strategies, especially for the point of entry (POE) methods (47). Undoubtedly, the application of different treatment methods that have been well discussed in the literature (30) should be considered as an approach after pilot studies, using real water samples for the co-removal of arsenic and nitrate.…”

Section: Discussionmentioning

confidence: 99%

Natural Arsenic Pollution and Hydrochemistry of Drinking Water of an Urban Part of Iran

Mosaferi¹,

Shakerkhatibi²,

Dastgiri³

et al. 2014

Avicenna J Environ Health Eng

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Natural contamination of surface and groundwater resources with arsenic is a worldwide problem. The present study aimed to investigate and report on the quality of drinking water resources with special focus on arsenic presence in an urban part of Iran. Arsenic concentrations were measured by graphite furnace atomic absorption spectroscopy (GFAAS). In both surface and groundwater samples, arsenic concentrations ranged from 6 -61 µg/L with an average value of 39 ± 20 µg/L. Concentration of arsenic, which was up to six times greater than guideline values (10 µg/L) indicates the presence of arsenic bearing materials in the geological structure of the region. It was found that the quality of treated surface water produced by the water treatment facility was good in respect to arsenic (9 µg/L) and solid content (EC = µs/cm). However, in drinking water samples of wells, total solids (mean EC = 1580 ± 150 µs/cm), total hardness (mean = 479 + 94 mg/L as CaCO3) and arsenic (mean = 42 + 16 µg/L) were significantly higher. Correspondingly, there was a significant correlation between arsenic concentration and EC, Na+, K + and Cl -values. The type of water in most of groundwater samples (70%) was determined as HCO 3-Na + . Considering the population of the city and probable health effects due to exposure to arsenic through drinking water, comprehensive measures as well as application of arsenic removal processes in water treatment facilities and replacement of contaminated wells with safe wells are required.

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“…Heavy metals are among the main pollutants of water and wastewaters in Iran and in other countries [1,2]. Industrial wastewaters of a variety of industries usually contain harmful heavy metal ions that can damage the aquatic life and human health [3].…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Pb(II), Cu(II), and Ni(II) ions onto novel lowcostP. eldaricaleaves-based biosorbent: isotherm, kinetics, and operational parameters investigation

Asgarzadeh

Faez

Maleki

et al. 2015

Desalination and Water Treatment

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In this study, the novel low-cost Pinus eldarica leaves-based biosorbent (Pe) was introduced to remove heavy metal ions from aqueous media. The Pe ability of Pb(II), Cu(II), and Ni(II) ions biosorption was investigated in aqueous solutions. The maximum sorption capacity was 40, 26, and 33 mg g −1 for Pb(II), Cu(II), and Ni(II), respectively, that was so promising. Experiments were carried out in lab-scale batch reactors as function of initial pH (pH 0 ), initial concentration of heavy metal ions (C 0 ), and contact time (t). The statistical analysis was applied to determine the significant parameters, rank of parameter influences, and type of influences. The adsorption kinetics data were modeled using the pseudo-first, pseudosecond-order, and intraparticle diffusion kinetics equations. The pseudo-first-order and pseudo-second-order kinetics equations described the adsorption kinetics very well. Finally, the equilibrium data were described by 15 isotherm models with different number of parameters from two to five. The results revealed that the Langmuir and Fritz-Schlunder models provided the best correlation of the experimental data.

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Evaluation of point-of-use drinking water treatment systems’ performance and problems

Cited by 15 publications

References 19 publications

Qualitative and health-related evaluation of point-of-use water treatment equipment performance in three cities of Iran

Qualitative and health-related evaluation of point-of-use water treatment equipment performance in three cities of Iran

Natural Arsenic Pollution and Hydrochemistry of Drinking Water of an Urban Part of Iran

Biosorption of Pb(II), Cu(II), and Ni(II) ions onto novel lowcostP. eldaricaleaves-based biosorbent: isotherm, kinetics, and operational parameters investigation

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