Considerations for emission monitoring and liner analysis of thermally manufactured sewer cured-in-place-pipes (CIPP)

JOURNAL OF HAZARDOUS MATERIALS

卷:371

Article

Ra, Kyungyeon¹  Sendesi, Seyedeh Mahboobeh Teimouri²  Nuruddin, Md.³  Zyaykina, Nadezhda N.^1,2  Conkling, Emily N.¹  Boor, Brandon E.²  Jafvert, Chad T.^1,2  Howarter, John A.^1,2  Youngblood, Jeffrey P.³  Whelton, Andrew J.^1,2 

[1] Purdue Univ, Div Ecol & Environm Engn, 500 Cent Dr, W Lafayette, IN 47907 USA

[2] Purdue Univ, Lyles Sch Civil Engn, 550 Stadium Mall Dr, W Lafayette, IN 47907 USA

[3] Purdue Univ, Sch Mat Engn, 701 W Stadium Ave, W Lafayette, IN 47907 USA

关键词: Hazardous air pollutants;    VOC;    SVOC;    Plastic;    Styrene;   

DOI  :  10.1016/j.jhazmat.2019.02.097

来源: Elsevier

【 摘 要 】

Cured-in-place-pipes (CIPP) are plastic liners chemically manufactured inside existing damaged sewer pipes. They are gaining popularity in North America, Africa, Asia, Europe, and Oceania. Volatile and semi-volatile organic compound (VOC/SVOC) emissions from storm sewer CIPP installations were investigated at a dedicated outdoor research site. Tedlar bag, sorbent tube, and photoionization detector (PID) air sampling was conducted for five steam-CIPP installations and was coupled with composite characterizations. New CIPPs contained up to 2.21 wt% volatile material and only 6-31% chemical mass extracted per CIPP was identified. Each 6.1 m [20 ft] liner contained an estimated 5-10 kg [11-22 lbs] of residual chemical. Extracted chemicals included hazardous air pollutants and suspected and known carcinogens that were not reported by others. These included monomers, monomer oxidation products, antioxidants, initiator degradation products, and a plasticizer. PID signals did not accurately represent styrene air concentration differing sometimes by 10s- to 1000s-fold. Multiple VOCs found in air samples likely affected PID responses. Styrene ( > 86.4 ppm(v)) and methylene chloride ( > 1.56 ppm(v)) air concentrations were likely greater onsite and phenol was also detected. Additional studies are needed to examine pollutant emissions so process monitoring can be improved, and environment impacts and associated human exposures can be minimized.

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