An exploratory study of the effects of stormwater pipeline materials on transported stormwater quality

Validerad; 2017; Nivå 2; 2017-08-15 (andbra)
Implications of three sewer pipe materials (concrete, galvanized corrugated steel, and polyvinyl chloride (PVC)) for stormwater quality were explored in laboratory experiments, in which three types of stormwater, SW1-SW3, were circulated in 0.5 m long sewer pipe sections. SW1 and SW2 represented synthetic rainwater, without and with fine street sediment added (CTSS = 150 mg/L), respectively, and SW3 was actual stormwater with the same sediment addition as SW2. Following 20-min runs, with an equivalent distance of 500 m travelled by water particles, a number of statistically significant changes in the stormwater chemistry were observed: (i) pH of all the simulated stormwaters increased in the concrete pipe (from 7.0-7.3 to 8.1-9.3), (ii) turbidity decreased in two stormwaters with sediments (SW2 and SW3) in concrete and galvanized corrugated steel pipes (by 50 and 85%, respectively), (iii) the type of stormwater affected the observed copper (Cu) concentrations, with Cudiss concentrations as high as 25.3 μg/L noted in SW3 passing through the PVC pipe, and (iv) zinc (Zn) concentrations sharply increased (Zntot = 759-1,406 μg/L, Zndiss = 670-1,400 μg/L) due to Zn elution from the galvanized steel pipe by all three stormwaters. Such levels exceeded the applicable environmental guidelines.

Österlund, HeleneLuleå tekniska universitet,Arkitektur och vatten(Swepub:ltu)helost (author)
Marsalek, JiriLuleå tekniska universitet,Arkitektur och vatten(Swepub:ltu)jirmar (author)
Viklander, MariaLuleå tekniska universitet,Arkitektur och vatten(Swepub:ltu)marvik (author)
Luleå tekniska universitetArkitektur och vatten (creator_code:org_t)

In:Water Science and Technology: IWA Publishing76:2, s. 247-2550273-12231996-9732

By the author/editor: Borris, Matthias; Österlund, Helen ...; Marsalek, Jiri; Viklander, Maria

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Civil Engineerin ...; and Water Engineerin ...

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