Highway runoff treatment by lab-scale horizontal sub-surface flow constructed wetlands

Fu, Da Fang; Singh, Rajendra Prasad; Huang, Juan; Ojha, C. S. P.; Surapalli, Rao Y.; Zhang, Tian C.

doi:10.1016/j.ecoleng.2013.12.041

Cited by 6 publications

(1 citation statement)

References 18 publications

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“…[1][2][3][4][5] According to the best management practices, a wide variety of treatment facilities exists, including bioretention and bioslope, surface sand filter, gutter filter, infiltration trenches/strips, infiltration tanks, soakways, swales, natural or engineered wetlands, sustainable drainage systems, separators or separate sewer systems. [6][7][8][9] In these devices, the contaminants are removed only partially and insufficiently. Application of conventional water treatment methods such as chemical precipitation, reduction or osmosis may be very expensive and energyconsuming.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of single and multilayered reactive zones for heavy metals removal from stormwater

Pawluk

Fronczyk

2015

Environmental Technology

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In this paper, the ability of granular activated carbon (GAC), silica spongolite (SS) and zeolite (Z) to remove heavy metals from aqueous solutions has been investigated through column tests. The breakthrough times for a mobile tracer that does not sorb to the material for SS, GAC and layered SS, Z and GAC were as follows: 2.54×10(4) s, 2.38×10(4) s and 3.02×10(4) s. The breakthrough time (tbR) for Ni was in the range from tbR=1.70×10(6) s for SS, through tbR=3.98×10(5) s for the layered bed, to tbR=8.75×10(5) s for GAC. The breakthrough time for Cd was in the range from tbR=1.83×10(5) s for GAC to tbR=1.30×10(6) s for SS, Z, GAC. During the experiment, the concentration of Cd, Cu, Pb and Zn in the solution from a column filled with construction aggregate and the concentration of Pb, and Cu in a filtrate from the column filled with several materials was close to zero. The reduction in metal ions removal was due to high pH values of the solution (above 8.00). In addition, during the testing period, an increase in Cd and Zn concentrations in the filtrate from the column filled with the layered bed was observed, but at the end of the experiment the concentrations did not reach the maximum values. The test results suggest that the multilayered permeable reactive barrier is the most effective technology for long time effective removal of heavy metals.

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Section: Introductionmentioning

confidence: 99%

Evaluation of single and multilayered reactive zones for heavy metals removal from stormwater

Pawluk

Fronczyk

2015

Environmental Technology

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Clogging development and hydraulic performance of the horizontal subsurface flow stormwater constructed wetlands: a laboratory study

Tang

Zhou

et al. 2017

Environ Sci Pollut Res

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The horizontal subsurface constructed wetland (HSSF CW) is a highly effective technique for stormwater treatment. However, progressive clogging in HSSF CW is a widespread operational problem. The aim of this study was to understand the clogging development of HSSF CWs during stormwater treatment and to assess the influence of microorganisms and vegetation on the clogging. Moreover, the hydraulic performance of HSSF CWs in the process of clogging was evaluated in a tracer experiment. The results show that the HSSF CW can be divided into two sections, section I (circa 0-35 cm) and section II (circa 35-110 cm). The clogging is induced primarily by solid entrapment in section I and development of biofilm and vegetation roots in section II, respectively. The influence of vegetation and microorganisms on the clogging appears to differ in sections I and II. The tracer experiment shows that the hydraulic efficiency (λ) and the mean hydraulic retention time (t ) increase with the clogging development; although, the short-circuiting region (S) extends slightly. In addition, the presence of vegetation can influence the hydraulic performance of the CWs, and their impact depends on the characteristics of the roots.

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Floating constructed wetland for the treatment of polluted river water: A pilot scale study on seasonal variation and shock load

Saeed

Paul

Afrin

et al. 2016

Chemical Engineering Journal

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Highway runoff treatment by lab-scale horizontal sub-surface flow constructed wetlands

Cited by 6 publications

References 18 publications

Evaluation of single and multilayered reactive zones for heavy metals removal from stormwater

Evaluation of single and multilayered reactive zones for heavy metals removal from stormwater

Clogging development and hydraulic performance of the horizontal subsurface flow stormwater constructed wetlands: a laboratory study

Floating constructed wetland for the treatment of polluted river water: A pilot scale study on seasonal variation and shock load

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