A study on the seawater purification characteristics of water-permeable concrete using recycled aggregate

Park, Seung Bum; Lee, Byung‐Jae; Lee, Jun; Jang, Young Il

doi:10.1016/j.resconrec.2009.11.006

Cited by 41 publications

(13 citation statements)

References 1 publication

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“…Few studies have been conducted on the restoration of contaminated rivers through water purification. Some studies are investigating ways of building river structures with porous concrete or using complex effective microorganisms, but their effects have turned out to be insignificant [5][6][7].…”

Section: Methodsmentioning

confidence: 99%

Strength and Water Purification Properties of Environment-Friendly Construction Material Produced with the (D)PAOs and Zeolite

Jang

Lee

2019

Applied Sciences

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The goal of this study was to improve the water purification performance of secondary concrete products that can be used in rivers and streams. To this end, mortar and porous concrete were produced by adding both de-nitrifying phosphate accumulating organisms ((D)PAOs) and zeolite, and their mechanical properties and water purification performance were analyzed. The compression strength test results showed that the strength was the highest when the mixing ratios of (D)PAOs and zeolite were set to 10% and 5%, respectively. For better contaminant adsorption, however, the optimal mixing ratio of zeolite was determined to be 10%. When the mixing ratio of (D)PAOs was set to 10%, the concentrations of biochemical oxygen demand (BOD) and chemical oxygen demand (COD) decreased by 57.9% and 89.9%, respectively, after seven days of immersion when compared to the initial concentrations. When compared to plain porous concrete, the total nitrogen (T-N) and total phosphorus (T-P) removal ratios of the develop concrete were 11.0% and 17.8% higher, respectively. When the mixing ratios of (D)PAOs and zeolite were set to 10% for both, the T-N and T-P removal ratios were determined to be 86.3% and 88.1%, respectively, while the BOD and COD concentrations were 2.668 mg/L and 16.915 mg/L, respectively. In simpler terms, the water purification performance was up to 17% higher in the concrete mixed with both 10% (D)PAOs and 10% zeolite than in the concrete mixed with 10% (D)PAOs only. Overall, the optimal mixing ratios of (D)PAOs and zeolite to maximize the water purification effect of secondary concrete products while maintaining their strengths equivalent to or higher than those of their corresponding plain concrete products are considered to be 10% for both.

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Section: Methodsmentioning

confidence: 99%

Strength and Water Purification Properties of Environment-Friendly Construction Material Produced with the (D)PAOs and Zeolite

Jang

Lee

2019

Applied Sciences

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“…The water permeability coefficient of pervious geopolymer concrete was tested by using the constant head method and carried out when a steady state flow was reached [18,19]. The coefficients of water permeability (k) were the three specimen averages, and they were calculated by following Darcy's law as shown in the following Equation (1).…”

Section: Water Permeabilitymentioning

confidence: 99%

Optimum Mix for Pervious Geopolymer Concrete (GEOCRETE) Based on Water Permeability and Compressive Strength

et al. 2017

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Abstract. The production of ordinary Portland cement (OPC) consumes considerable natural resources and energy, and it also affects the emission of a significant quantity of CO 2 in the atmosphere. This pervious geopolymer concrete study aims to explore an alternative binder without OPC. Pervious geopolymer concretes were prepared from fly ash (FA), sodium silicate (NaSiO 3 ), sodium hydroxide (NaOH) solution, and coarse aggregate (CA). The effects of pervious geopolymer concrete parameters that affect water permeability and compressive strength are evaluated. The FA to CA ratios of 1:6, 1:7,1:8, and 1:9 by weight, CA sizes of 5-10, 10-14, and 14-20 mm, constant NaSiO 3 /NaOH ratio of 2.5, alkaline liquid to fly ash (AL/FA) ratios of 0.4, 0.5, and 0.6, and NaOH concentrations of 8, 10, and 12 M were the pervious geopolymer concrete mix proportions. The curing temperature of 80 °C for 24 h was used. The results showed that a pervious geopolymer concrete with CA of 10 mm achieved water permeability of 2.3 cm/s and compressive strength of 20 MPa with AL/FA ratio of 0.5, NaOH concentration of 10 M, and FA:CA of 1:7. GEOCRETE is indicated to have better engineering properties than does pervious concrete that is made of ordinary Portland cement.

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“…Ming-Ju Lee, Ming-Gin Lee, Yishuo Huang, and Chia-Liang Chiang voids formed inside the water permeable concrete and its wide specific surface area are effective in the aspect of water purification by providing inhabitation space for phytoplankton, bacteria and living organisms [6]. However, a research and development study is needed to determine the method to improve the water purification performance against the inflow of a large amount of wastewater and harmful substances and to solve these problems.…”

Section: Purification Study Of Pervious Concrete Pavementmentioning

confidence: 99%

“…Suspended solids, heavy metals, and hydrocarbons are distributed over pavement surfaces by automobile exhaust and crankcase leakages [6]. Automobile pollutants accumulate on road surfaces until a precipitation event carries these pollutants away in runoff that eventually enters waterways or groundwater [7].…”

Section: Introductionmentioning

confidence: 99%

Purification Study of Pervious Concrete Pavement

Lee¹,

Lee²,

Huang³

et al. 2013

IJET

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Abstract-Pervious concrete pavement is an effective means to address important environmental issues and support green and sustainable growth. By capturing storm water and allowing it to seep into the ground, pervious concrete is instrumental in recharging groundwater, reducing storm water runoff, and meeting U.S. Environmental Protection Agency storm water regulations. In fact, the use of pervious concrete is among the Best Management Practices recommended by the EPA.In this research, water quality and pollutants leached from pervious concrete pavement was investigated. This project mainly aims to study the pervious concrete pavement by pollutants such as acid rain, sea water or waste lubricating oil. The results show that pollutant and water purification of pervious concrete pavement both significantly improved in the acid rain, sea water or waste motor oil test. A diluted sulfuric acid solution (pH value 2.0) after the pervious concrete pavement system could significantly enhance its pH value to 6.5 above. This study demonstrates that implementing pervious concrete pavement is valuable for road design and hydrologic consideration.

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A study on the seawater purification characteristics of water-permeable concrete using recycled aggregate

Cited by 41 publications

References 1 publication

Strength and Water Purification Properties of Environment-Friendly Construction Material Produced with the (D)PAOs and Zeolite

Strength and Water Purification Properties of Environment-Friendly Construction Material Produced with the (D)PAOs and Zeolite

Optimum Mix for Pervious Geopolymer Concrete (GEOCRETE) Based on Water Permeability and Compressive Strength

Purification Study of Pervious Concrete Pavement

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