Similar articles

Abstract: This study investigated the removal and transformation of organic matter through laboratory-scale soil-aquifer treatment (SAT) soil columns over a 110-day period. Reductions in total organic carbon (TOC), dissolved organic carbon (DOC), biodegradable dissolved organic carbon (BDOC), nonbiodegradable dissolved organic carbon (NBDOC) and absorbance of ultraviolet light at 254 nm (UV-254) averaged 71.46%, 68.05%, 99.31%, 33.27% and 38.96% across the soil columns, respectively. DOC/TOC ratios increased slightly with depth while BDOC/DOC ratios showed a converse trend. DOC exiting the soil-column system contained only a very small biodegradable fraction. SAT decreased the concentration of DOC present in feed water but increased its aromaticity, as indicated by specific ultraviolet light absorbance (SUVA), which increased by 50%~115% across the soil columns, indicating preferential removal of non-aromatic DOC during SAT. Overall, laboratory-scale SAT reduced trihalomethane formation potential (THMFP), although specific THMFP increased. THMFP reduction was dominated by removal in chloroform. All samples exhibited a common general relationship with respect to weight: chloroform>dichlorobromomethane >dibromochloromethane>bromoform.

[1] Basu, O.D., Huck, P.M., 2004. Removal of humic acid by biofiltration. Water Supply, 4(4):147-154.

[2] Chow, A.T., Tanji, K.K., Gao, S., 2003. Production of dissolved organic carbon (DOC) and trihalomethane (THM) precursor from peat soils. Wat. Res., 37(18):4475-4485.

[3] Drewes, J.E., Peter, F., 1999. Fate of nature organic matter (NOM) during groundwater recharge using reclaimed water. Wat. Sci. Tech., 40(9):241-249.

[4] Drewes, J.E., Reinhard, M., Fox, P., 2003. Comparing microfiltration-reverse osmosis and soil-aquifer treatment for indirect potable reuse of water. Wat. Res., 37(15):3612-3621.

[5] Fox, P., Aboshanp, W., Alsamadi, W., 2005. Analysis of soils to demonstrate sustained organic carbon removal during soil aquifer treatment. J. Environ. Qual., 34(1):156-163.

[6] Galapate, R.P., Baes, A.U., Okada, M., 2001. Transformation of dissolved organic matter during ozonation effects on trihalomethane formation potential. Wat. Res., 35(9):2201-2206.

[7] Leenheer, J.A, Croué, J.P., 2003. Characterizing dissolved aquatic organic matter. Environ. Sci. Tech., 37(1):18A-26A.

[8] Leenheer, J.A., Rostad, C.E., Barber, L.B., 2001. Nature and chlorine reactivity of organic constituents from reclaimed water in groundwater, Los Angeles County, California. Environ. Sci. Tech., 35(19):3869-3876.

[9] Kwon, B., Lee, S., Cho, J., Ahn, H., Lee, D., Shin, H.S., 2005. Biodegradability, DBP formation, and membrane fouling potential of nature organic matter: characterization and controllability. Environ. Sci. Tech., 39(3):732-739.

[10] Quanrud, D.M., Hafer, J., Karpiscak, M.M., Zhang, H.M., Lansey, K.E., Arnold, R.G., 2003. Fate of organics during soil-aquifer treatment: sustainability of removals in the field. Wat. Res., 37(14):3401-3411.

[11] Rauch-Williams, T., Drewes, J.E., 2004. Assessing the removal potential of soil-aquifer treatment systems for bulk organic matter. Wat. Sci. Tech., 50(2):245-253.

[12] Rauch-Williams, T., Drewes, J.E., 2006. Using soil biomass as an indicator for the biological removal of effluent-derived organic carbon during soil infiltration. Wat. Res., 40(5):961-968.

[13] Rostad, C.E., Martin, B.S., Barber, L.B., Leenheer, J.A., Daniel, S.R., 2000. Effect of constructed wetland on disinfection byproducts: removal process and production of precursors. Environ. Sci. Tech. 34(13):2703-2710.

[14] Viswanathan, M.N., Al Senafy, M.N., Rashid, T., Al-Awadi, E., Al-Fahad, K., 1999. Improvement of tertiary wastewater quality by soil aquifer treatment. Wat. Sci. Tech., 40(7):159-163.

[15] Westerhoff, P., Pinney, M., 2000. Dissolved organic carbon transformations during laboratory-scale groundwater recharge using lagoon-treated wastewater. Wat. Manag., 20(1):75-83.

[16] Yoon, J., Choi, Y., Cho, S., Lee, D., 2003. Low trihalomethane formation in Korean drinking water. The Science of the Total Environment, 302(1-3):157-166.