کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4432921 | 1619928 | 2008 | 7 صفحه PDF | دانلود رایگان |
The potential impact of oil and grease (O and G) to soils irrigated with greywater (GW) was investigated. Greywater streams were sampled and analyzed for O and G content, along with corresponding GW-irrigated soils. Untreated kitchen GW averaged 200 mg L− 1 O and G, over an order of magnitude more than other GW streams. GW-irrigated soils showed O and G accumulation of up to 200 mg kg− l within the first 20-cm of depth. To determine the potential effects of such O and G accumulation on water movement in soil, capillary rise and water drop penetration time (WDPT) experiments were conducted. The results showed up to 60% decrease in capillary rise when sand containing 250 mg kg− 1 O and G was used. Interestingly, no additional reduction in capillary rise was observed at concentrations above 250 mg kg− 1. WDPT was observed to increase linearly with increased O and G content, up to 1000 mg kg− 1. This work demonstrated that O and G in GW used for irrigation can accumulate in soil and may lead to a significant reduction in the soils ability to transmit water.
Journal: Science of The Total Environment - Volume 394, Issue 1, 1 May 2008, Pages 68–74