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1334106 
Journal Article 
Kinetics of di-(2-ethylhexyl)phthalate mineralization in sludge-amended soil 
Lindequist Madsen, P; Bandsholm Thyme, J; Henriksen, K; Moldrup, P; Roslev, P 
1999 
1 
Environmental Science & Technology
ISSN: 0013-936X
EISSN: 1520-5851 
ACS 
Washington, DC, United States 
33 
15 
2601-2606 
English 
WOS:000081811200035 
Sewage sludge is frequently used as a soil fertilizer although it may contain elevated concentrations of priority pollutants including di-(2-ethylhexyl)phthalate (DEHP). In the present study, the kinetics of microbial (14C)DEHP mineralization was studied in laboratory microcosms with sewage sludge and agricultural soil. A biphasic model with two independent kinetic expressions was used to fit the mineralization data. The initial mineralization activity was described well by first-order kinetics -1 d-1 depending on incubation conditions. Aerobic DEHP mineralization was 4-5 times faster than anaerobic mineralization. DEHP mineralization in sludge-amended soil was much more temperature sensitive than was DEHP mineralization in soil without sludge. Indigenous microorganisms in the sewage sludge appeared to dominate DEHP degradation in sludge-amended soil. It was estimated that41% of the DEHP in sludge-amended soil will have escaped mineralization after 1 year. In the a 
Desorption; Mathematical models; Microorganisms; Organic compounds; Oxygen; Reaction kinetics; Soils; Thermal effects; Diffusion limited desorption; First order kinetics; Fractional power kinetics; Mineralization; Sludge amended soil; Sewage sludge; fertilizer; glue; oxygen; phthalic acid bis(2 ethylhexyl) ester; xenobiotic agent; article; bioavailability; mineralization; sludge; soil pollutant; soil pollution; temperature sensitivity