Effect of di-n-butyl phthalate (DBP) on activated sludge
The effects of di-n-butyl-phthalate (DBP) on both acclimated and unacclimated activated sludge were investigated in batch reactors.The IC 50 values on the basis of maximum specific growth rate (μ m), the chemical oxygen demand (COD) removal efficiency and the oxygen uptake rate (OUR) of unacclimated activated sludge was determined and found to be 78.8, 52.2 and 50.1 mg/l, respectively.
Effect of di-n-butyl phthalate (DBP) on activated sludge
The effects of di- -butyl-phthalate (DBP) on both acclimated and unacclimated activated sludge were investigated in batch reactors. The IC values on the basis of maximum specific growth rate ( mg/l, respectively. The COD removal efficiency was affected even at low DBP concentrations.
Phthalates: Uses, Safety Concerns, How to Read Labels
Phthalates are linked to reduced testosterone levels (a sex hormone) and low sperm counts in males. 7 In all sexes, high phthalate exposure may lead to reduced fertility. Pregnant people who have been exposed to high levels of phthalates might give birth to babies with cognitive or behavioral problems.
Lower concentrations of phthalates induce proliferation
The present study demonstrates that, even at a very low concentration, BBP, DBP, and DEHP were not only still capable of inducing a proliferative effect through the PI3K/AKT signaling pathway but also displaying estrogenic activity. Therefore, the current reference doses for phthalates defined by go
Biomonitoring Summary | CDC
In addition, exposure to benzylbutyl phthalate (BzBP) will also result in small amounts of mono-n-butyl phthalate appearing in the urine. Following oral administration of DBP to humans, about 65% to 80% of a dose is eliminated in urine within 24 hours, mostly as MnBP (Anderson et al., 2001).
- Can bacterial strains biodegrade dibutyl phthalate (DBP) from activated sludge?
- A bacterial strain capable of biodegrading dibutyl phthalate (DBP) was successfully isolated from activated sludge and characterized as a potential novel Microbacterium sp. USTB-Y based on 16S rRNA sequence analysis and whole genome average nucleotide identity (ANI).
- Can activated sludge transform DBP into PA and biodegraded BBP in MSM?
- In this study, Microbacterium sp. USTB-Y from activated sludge could efficiently transform DBP into PA and biodegrade BBP in MSM. This is consistent with the results of Microbacterium sp. PAE-1 (Lu et al. 2020 ).
- What happens if DBP is increased to 500 mg/L?
- When the initial concentration of DBP is increased to 500 mg/L, the first-order degradation constant (k) falls to 0.0628 h −1 and the half-life increases to 21.00 hours. (Online Resource 1 table S1-3)
- What is the biodegradation ability of DBP MBP & PA by strain USTB-y?
- To investigate the biodegradation ability of DBP, MBP, and PA by strain USTB-Y, the initial concentration in the culture solution was set at 500 mg/L. The degradation curve of DBP, MBP, and PA by strain USTB-Y was obtained by sampling the culture solution every 24 hours to get the growth curve of the strain.
- Can USTB-y biodegrade DBP from artificially contaminated soil?
- Strain USTB-Y can biodegrade 50 mg/L DBP from artificially contaminated soil within 12 hours (Huang et al. 2018). This is a more efficient biodegradation process than that of Bacillus subtilis N-1 (5 days) and Rhodococcus ruber CQ0301 (10 days) (Li et al. 2006).
- Can strain USTB-Y effectively biodegrade DBP?
- Strain USTB-Y effectively biodegrades DBP at a broad range of temperatures (15–40 °C) and pH (5.5–9.5). It is better adapted to low temperature and acidity. The degradation ratios at 15 °C and pH 5.5 reached more than 58% (Fig. 2 ), which is higher than that of consortium B1 (Yang et al. 2018) and consortium LV-1 (Wang et al. 2017 ).
