Degradation kinetic of dibutyl phthalate (DBP) by sulfate
UV/PS process showed a high efficiency to degrade DBP. DBP degradation was adversely affected by initial DBP dosage, pH, NOM and HCO 3-. The degradation was promoted by PS and Cl below the critical PS and Cl dosage. A simple steady-state kinetic model was developed. Both OH and SO 4 existed in the system with OH
Degradation kinetic of dibutyl phthalate (DBP) by sulfate
Then the degradation rate of DBP in the UV/PS system can be written as follows: (1) d [ C] dt = - ( k 1 ,C [ SO 4 -] ss + k 2 ,C [ HO] ss) = - k o s [ C] where [SO 4] ss and [HO] ss are the steady-state concentrations of SO 4 and HO, respectively; C represents the target compound which is DBP in this study; k 1 ,C and k 2 ,C are the
Biodegradation of dibutyl phthalate by a novel endophytic
Biodegradation of dibutyl phthalate by a novel endophytic Bacillus subtilis strain HB-T2 under in-vitro and in-vivo conditions Biodegradation of dibutyl phthalate by a novel endophytic Bacillus subtilis strain HB-T2 under in-vitro and in-vivo conditions Environ Technol. 2025 Nov 30;1-27. doi: 10.1080/09593330.2025.1858181. Online ahead of print.
Degradation of dibutyl phthalate by ozonation in the
The DBP degradation rate was diminished in the presence of tert -butyl alcohol. Cavitation bubbles are considered as innumerable microreactors. Degradation of DBP by direct ozonation, hydroxyl radical (·OH) oxidation, high pressure, and high-temperature pyrolysis was demonstrated.
Complete biodegradation of di-n-butyl phthalate (DBP) by a
The degradation curves of DBP (50-2000 mg/L) fitted well the first-order kinetics model, with a half-life (t 1/2) ranging from 0.86 to 1.88 d. The main degradation intermediates were identified as butyl-ethyl phthalate (BEP), mono-butyl phthalate (MBP), phthalic acid (PA) and benzoic acid (BA), indicating a new complex and complete
- Is dibutyl phthalate initiated by hydroxyl (OH) and sulfate radicals?
- In this study, the reaction mechanism and kinetics of dibutyl phthalate (DBP) initiated by hydroxyl (OH) and sulfate radicals (SO 4−) were investigated at the CAM-B3LYP/6-311 + G (d,p) level through Density Functional Theory (DFT), where the preferred reaction sites of DBP were determined.
- Can Microbacterium degrade dibutyl phthalate completely by biochemical cooperation?
- In the present study, a bacterial consortium consisting of Microbacterium sp. PAE-1 and Pandoraea sp. PAE-2 was isolated by the enrichment method, which could degrade dibutyl phthalate (DBP) completely by biochemical cooperation.
- Can dibutyl phthalate be degraded on quartz sand?
- Soil contamination by organic compounds has received worldwide concern for decades. Here, we found that dibutyl phthalate (DBP) could be degraded on moist quartz sand (QS, crystal, a typical soil constituent) during stirring, and the removal rate reached 57.2 ± 3.1% after 8 h of reaction.
- What is a steady-state kinetic model for dibutyl phthalate?
- A simple steady-state kinetic model was developed. Both OH and SO 4 existed in the system with OH·contributing more. The ultraviolet/persulfate (UV/PS) process was used to degrade dibutyl phthalate (DBP) at different reaction conditions and a steady-state kinetic model was established based on the elementary reactions involved as well.
- What affects the degradation efficiency of DBP?
- The degradation efficiency of DBP was affected by PS dosage, initial DBP concentration, solution pH value, natural organic matter (NOM) and inorganic anions. Increasing PS dosage could enhance the degradation of DBP before PS dosage reaching 1.6 mM.
- What is dibutyl phthalate (DBP)?
- Dibutyl phthalate (DBP), one of the most widely used PAEs, has been detected in wine, cosmetics, soils, foods and even in the atmosphere and daily drinking water , , , . Worse yet, DBP is harmful to human via damaging the reproductive, endocrine, and nervous systems even at very low concentrations , , .
