Removal of Phosphorus from Synthetic Wastewater Using Recycled Concrete Aggregates as a Filter Medium

Adnan, Suraya Hani; Hamdan, Rafidah; Roni, Norwardatun Abd

doi:10.33736/jcest.878.2018

Cited by 5 publications

(4 citation statements)

References 11 publications

(8 reference statements)

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“…Then again, the size of RCA also influenced on the removal of phosphorus. From previous study [8], stated that for different size of RCA, it shows that smaller size of RCA act as the best filter media in removing Phosphorus which is for (66-99%) percentage removal of Phosphorus between sizes of RCA (5-35 mm). The initial concentration of synthetic wastewater chosen from (10-50 mg/L).…”

Section: Introductionmentioning

confidence: 89%

“…As we know, cement paste contains high amount of Calcium [8]. This is due to the higher calcium content, the higher the ability for removing phosphorus.…”

Section: Analysis Methodsmentioning

confidence: 99%

“…These findings demonstrate that BFS and RCA has a high capacity for adsorbing phosphorus from wastewater which same took place on the BFS surface and RCA surface. The RCA was encompassed of 36.60% of calcium oxide that was stated from previous study by [8] while [7] state that the BFS was comprised of 39.97 % of calcium oxide. Therefore, the adsorption of phosphorus to calcium oxide could have been the key removal mechanism for phosphorus in the RCA filter and BFS filter.…”

Section: Analysis Methodsmentioning

confidence: 99%

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Recycled Concrete Aggregates as a Filter for Removal of Phosphorus in Synthetic Wastewater

Roni¹,

Adnan²,

Hamdan³

2018

IJET

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This paper assesses of recycled concrete aggregates as a filter for removal of phosphorus in synthetic wastewater. Recycled concrete aggregate used as a filter system emerged as an alternative technology for phosphorus removal. This can overcome the problem of construction site waste by converting the waste into something valuable products. Thus, this study aim to determine the percentage of Phosphorus removal by using two different size of Recycled Concrete Aggregate which is (5 mm to 10 mm) and (25 mm to 30 mm). A total of five vertical recycled concrete aggregate filter laboratory scale was design using recycled concrete aggregate and five different concentration of synthetic wastewater which is 10 – 50 mg/L was prepared. Samples were taken from the influent and effluent filters to be tested once a week, and analyzed to determine the value of pH and the percentage of Phosphorus removal (%). RCA was analyzed using Scanning Electron Microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDX) testing to determine chemical composition. Results shows that RCA is highly contained with Aluminium, Calcium and Magnesium elements that enhanced the phosphorus adsorption. The RCA with size 5 mm to 10 mm and synthetic wastewater 10 mg/L display high potential in removing Phosphorus with 99.54% removal at pH 9.77. The lower concentration of synthetic wastewater, smaller size of RCA and higher pH have slightly better Phosphorus removal efficiency. Thus, RCA has a potential in removing Phosphorus from synthetic wastewater.

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Section: Introductionmentioning

confidence: 89%

“…As we know, cement paste contains high amount of Calcium [8]. This is due to the higher calcium content, the higher the ability for removing phosphorus.…”

Section: Analysis Methodsmentioning

confidence: 99%

Section: Analysis Methodsmentioning

confidence: 99%

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Recycled Concrete Aggregates as a Filter for Removal of Phosphorus in Synthetic Wastewater

Roni¹,

Adnan²,

Hamdan³

2018

IJET

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“…The increase in P removal above pH 9 could be due to a similar mechanism due to the formation of OH enriched complexes precipitating calcium phosphate. At pH levels greater than 6, the reactions are a combination of physical adsorption to iron and aluminium oxides and precipitation as sparingly soluble calcium phosphates [9].…”

Section: Percentage Removal Of Phosphorus Due To Phmentioning

confidence: 99%

Phosphorus Removal Efficiencies of Recycled Concrete Aggregate Column System Filter

2020

IJETER

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is one of the key nutrients that lead to eutrophication in surface water. However, existing conventional wastewater treatment systems for removing phosphorus are expensive and complex. Recycled concrete aggregate (RCA) may be an alternative solution for phosphorus removal. It can reduce pollution and landfill disposal by converting construction waste into valuable products. This study aims to investigate the physical and chemical characteristics of RCA that influence the removal of phosphorus, as well as the percentage of phosphorus removal using RCAs of two different sizes namely, 5 mm to 10 mm and 25 mm to 30 mm. A total of five vertical laboratory-scale RCA filters were designed and five different concentrations of synthetic wastewater between 10 -50 mg/L were prepared. The samples taken from the influent and effluent filters were tested and analysed in terms of pH, the uptake capacity of phosphorus (q) and the percentage of phosphorus removal (%). RCA was analysed using Scanning Electron Microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDX) to determine its chemical composition. The results show that RCA has a high content of aluminium, calcium and magnesium that enhances phosphorus adsorption. RCA measuring between 5 mm to 10 mm in 10 mg/L of synthetic wastewater achieved the highest phosphorus removal percentage of 99.54% at a pH 10. The highest percentage of phosphorus removal achieved was 99.54% in the initial concentration of 10 mg/L by RCA measuring between 5 mm to 10 mm while the lowest percentage of phosphorus removal was 66.25% in the initial concentration of 50 mg/L for RCAs measuring between 25 mm to 30 mm. Furthermore, RCA achieved the highest uptake capacity (q) of 3.45 mg/L in the initial wastewater concentration of 50 mg/L. In conclusion, RCA has the potential to remove phosphorus, particularly in low concentrations of synthetic wastewater and high pH conditions.

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Methane Emission Control at the High-Productive Longwall Panels of the Yalevsky Coal Mine

Meshkov¹,

Kazanin

Sidorenko

2020

E3S Web Conf.

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The analysis of the experience of methane emission control at the V. D. Yalevsky mine (Kuznetsk coal basin, Russia) during the series of shallow gassy coal seams mining with the high productive longwall was performed. The analysis of the efficiency of gob degassing by the vertical wells and isolated methane removal by gas-suction fans is performed. The efficiency of reducing the distance between ventilation crosscuts between entries is shown. It is also shown that the problems of providing the longwall high productivity in conditions of increasing the natural gas content in the coal seams are associated with gas emission from the extracted coal seam and the lack of effective methods for its early and preliminary degassing. Recommendations for using advanced mining of close-up coal seams as an effective method of degassing of rock mass within the zone of influence of undermining and overmining are given.

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Removal of Phosphorus from Synthetic Wastewater Using Recycled Concrete Aggregates as a Filter Medium

Cited by 5 publications

References 11 publications

Recycled Concrete Aggregates as a Filter for Removal of Phosphorus in Synthetic Wastewater

Recycled Concrete Aggregates as a Filter for Removal of Phosphorus in Synthetic Wastewater

Phosphorus Removal Efficiencies of Recycled Concrete Aggregate Column System Filter

Methane Emission Control at the High-Productive Longwall Panels of the Yalevsky Coal Mine

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