Study of filter height effect on removal efficiency of Cd, Cu, Pb and Zn from water by slow sand filtration

Barkouch, Yassir; Flata, Khadija; Melloul, Abdelaziz Ait; Khadiri, M.; Pineau, Alain

doi:10.5004/dwt.2019.24315

Cited by 7 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Doré et al [16] report that all tested pitcher filters increased the iron, magnesium, sulphur, and zinc concentrations in the filtrate water, due to their presence in, and subsequent release from the filter media. The results from the sequential filtration experiment are in accordance with the previous research of Ndé-Tchoupé et al, [19] and Barkouch et al [20], who showed that, apart from the material filling the cartridge, the efficiency of metal removal can be related to factors such as increased length of the filtration bed, i.e. the increased contact time between water and filter media.…”

Section: Removal Efficiency Of Copper and Iron Via Pitcher Filterssupporting

confidence: 90%

“…This effect gradually decreases with filters age, so that at 50% of their capacity the reduction is 16% and for the exhausted filters (100%)just 6%. The decrease in the removal efficiency of copper and iron over time is a consequence of the depletion of the sorption and ion exchange capacity of the media in the filters [19]. Although the model water in the experiment has concentrations of copper that are unlikely to be encountered in tap waters, the approximately 50% loss of efficiency of the filters by the end of their exploitation lifespan, as well as the more prominent decrease in the case of iron, shows people should avoid using exhausted filtrates to prevent potential health problems.…”

Section: Removal Efficiency Of Copper and Iron Via Pitcher Filtersmentioning

confidence: 99%

See 1 more Smart Citation

Effectiveness of point-of-use (POU) filter system for removal of contaminants from water

Manoleva,

Bankova,

Traykov

2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Groundwater supplies most of the drinking water in the small settlements in the Danubian plain region of Bulgaria. The region is mostly agricultural, leading to chemical pollution, mostly with nitrogen, of the shallow groundwater. Direct health concerns, linked to nitrates contamination of water, determine the increased popularity of drinking water point-of-use (POU) filtration pitchers. The objective of this study was to evaluate the effectiveness of a commercial pitcher filtration system in removing select pollutants, such as metal ions, namely, copper and iron, nitrate nitrogen, and suspended solids (algal culture of Monoraphidium contortum) from augmented tap water. In addition, we have studied the effects on electrical conductivity and pH of water. The POU system of choice was a widely used brand name in Bulgaria, providing cartridges that fit most of the European pitcher filter brands. We have evaluated the performance of the filters at three different exploitation intervals – pre-washed new filter (0%), 50%, and 100% of the exploitation capacity set according to manufacturers’ claims of recommended volume of water, as well as at different contact times between the water and the filter media. The results indicate that the efficiency of the filters diminishes with aging and increases with increasing contact time – multiple filtrations. The efficiency in terms of electrical conductivity and amount of iron decreases proportionally with filter age, and in terms of phosphates, the maximum effect is observed in filters at 50% capacity. Water filtration reduced water conductivity by 12% in a single filtration and stabilized the pH values towards the neutral range. The effect on pH values is inversely proportional to the buffering capacity of the water. The filters removed 85–98% of copper ions and 20% of iron ions. Nitrate removal efficiency averages 40% and doubling the contact time increases the efficiency to 70%. The efficiency of removing suspended solids is on average 17%, mainly due to the small size of the particles. Overall, the POU systems are an effective way to purify water at home. The filter cartridges effectively reduce contaminants, such as metals and nitrates, which are particularly problematic in areas supplied by groundwater sources.

show abstract

Section: Removal Efficiency Of Copper and Iron Via Pitcher Filterssupporting

confidence: 90%

Section: Removal Efficiency Of Copper and Iron Via Pitcher Filtersmentioning

confidence: 99%

Effectiveness of point-of-use (POU) filter system for removal of contaminants from water

Manoleva,

Bankova,

Traykov

2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…Cartridges JS500 and A5 had a longitudinal shape and the biggest height, this could positively affect the removal of copper. Barkouchet al [21] showed an increase in the removal of heavy metals (copper, cadmium, lead, and zinc) with an increase in the length of the filtration bed. This was attributed to a higher amount of adsorption sites bonding the heavy metals.…”

Section: Removal Of Copper Via Pitcher Filtersmentioning

confidence: 99%

Tap Water Purification Using Pitcher Filters

Puszczało

Kamińska

Marszałek

2022

Architecture, Civil Engineering, Environment

View full text Add to dashboard Cite

Due to the high risk of exposure to various contaminants in drinking water, pitcher filtration is rapidly growing in popularity worldwide as a cheap and easy method to remove pollutants from drinking water. On the other hand, an evaluation of the real-time performance of pitchers is not possible for usual consumers. This study presents the performance of pitcher filtration in the removal of copper, chlorine, and chloroform from tap drinking water. Pitchers were packed with Aquaphor cartridges JS500, A5, and B25. Experiments were performed with model solutions, which were prepared from hard drinking water (7.5 mval/L, pH=7) spiked with copper, hypochlorite sodium, and chloroform. It was found that pitcher filtration is a very effective method for the removal of pollutants such as heavy metals, chlorine, and disinfectants byproducts. The concentration of copper, chlorine, and chloroform in filtrates did not exceed the maximum admissible values. Cartridges JS500, A5, and B25 reduced chlorine at a comparable level – almost 100%. During the whole experimental period, removal of chloroform was slightly better for JS500 (100%) and A5 (100%) cartridges than for B25 (91.4–97.7%).

show abstract

“…For instance, nitrate was removed from 45.63 mg/L to 3.47 mg/L, phosphorous was removed from 2.8 mg/L to 0.26 mg/L, and sodium chloride from 9.7 mg/L to 0.68 mg/L. The study conducted by Barkouch et al [45] on the potential effects of filter height on the removal efficiency of Cd, Cu, Pb, and Zn using slow sand filtration had similar general observations. Despite the impressive removal performance from a 1 m depth column (Table 5), some of the parameters still do not comply with international regulations for different purposes.…”

Section: Treated Effluent Characterizationmentioning

confidence: 99%

Investigating the Influence of Column Depth on the Treatment of Textile Wastewater Using Natural Zeolite

et al. 2021

View full text Add to dashboard Cite

Textile industry production processes generate one of the most highly polluted wastewaters in the world. Unfortunately, the field is also challenged by the availability of relatively cheap and highly effective technologies for wastewater purification. The application of natural zeolite as a depth filter offers an alternative and potential approach for textile wastewater treatment. The performance of a depth filter treatment system can be deeply affected by the column depth and the characteristics of the wastewater to be treated. Regrettably, the information on the potential of these filter materials for the purification of textile wastewater is still scarce. Therefore, this study investigated the potential applicability of natural zeolite in terms of column depth for the treatment of textile wastewater. From the analysis results, it was observed that the filtration efficiencies were relatively low (6.1 to 13.7%) for some parameters such as total dissolved solids, electrical conductivity, chemical oxygen demand, and sodium chloride when the wastewater samples were subjected to the 0.5 m column depth. Relatively high efficiency of 82 and 93.8% was observed from color and total suspended solids, respectively, when the wastewater samples were subjected to the 0.5 m column depth. Generally, the 0.75 m column depth achieved removal efficiencies ranging from 52.3% to 97.5%, whereas the 1 m column depth achieved removal efficiencies ranging from 86.9% to 99.4%. The highest removal efficiency was achieved with a combination of total suspended solids and 1 m column depth (99.4%). In summary, the treatment approach was observed to be highly effective for the removal of total suspended solids, with a 93.8% removal efficiency when the wastewater was subjected to the 0.5 m column depth, 97.5% for 0.75 m column depth, and 99.4% for 1 m column depth. Moreover, up to 218.233 mg of color per g of the filter material was captured. The results derived in this study provide useful information towards the potential applicability of natural zeolite in the textile wastewater treatment field.

show abstract

Study of filter height effect on removal efficiency of Cd, Cu, Pb and Zn from water by slow sand filtration

Cited by 7 publications

References 21 publications

Effectiveness of point-of-use (POU) filter system for removal of contaminants from water

Effectiveness of point-of-use (POU) filter system for removal of contaminants from water

Tap Water Purification Using Pitcher Filters

Investigating the Influence of Column Depth on the Treatment of Textile Wastewater Using Natural Zeolite

Contact Info

Product

Resources

About