Next Article in Journal
Flow Rate Measurement of Production Profile Logging Using Thermal Method
Previous Article in Journal
Microphytobenthos in the Hypersaline Water Bodies, the Case of Bay Sivash (Crimea): Is Salinity the Main Determinant of Species Composition?
Article

Removal of AOX in Activated Sludge of Industrial Chemical Dyestuff with Bimetallic Pd/Fe Particles

by 1, 1, 1,*, 1 and 1,2
1
Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Environment in Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, China
2
School of Environment, Tsinghua University, Beijing 100084, China
*
Author to whom correspondence should be addressed.
Academic Editor: Caetano C. Dorea
Water 2021, 13(11), 1543; https://doi.org/10.3390/w13111543
Received: 16 April 2021 / Revised: 24 May 2021 / Accepted: 27 May 2021 / Published: 31 May 2021
(This article belongs to the Special Issue Research on Sludge Treatment)
Pd/Fe bimetallic particles were synthesized by chemical deposition and used to remove absorbable organic halogens (AOX) in the activated sludge of a chemical dyestuff wastewater treatment plant. Bath experiments demonstrated that the Pd/Fe bimetallic particles could effectively remove AOX. It indicated several factors, such as Pd loading, the amount of Pd/Fe used, initial activated sludge pH, and reaction time, which could affect the removal effect. The results showed that increasing the Pd content in Pd/Fe particles, from 0.01 to 0.05 wt %, significantly increased the removal efficiency of AOX in activated sludge. The Pd/Fe particles had a much higher removal efficiency of AOX in the activated sludge than bare Fe particles. A slightly acidic condition with a Pd content of 0.05% and 10 g/L of Pd/Fe was beneficial to the process of removing AOX in activated sludge. In detail, the removal efficiency of AOX in the activated sludge could reach 50.7% after 15 days of reaction with 10 g/L of Pd/Fe (Pd loading 0.05 wt %) and at an initial pH of 6.0 during the experiments. It also showed that the control samples without Fe0 and Fe/Pd additions only removed 7.9% of AOX under the same conditions. Meanwhile, the concentrations of AOX in the supernatant of activated sludge were lower than the initial AOX concentration in the supernatant during the activated sludge remediation with Pd/Fe bimetallic particles. The results indicated that the AOX removal from the activated sludge matrix might be mainly due to the Pd/Fe bimetallic particles, and not just by phase transfer. View Full-Text
Keywords: absorbable organic halogens (AOX); activated sludge; Pd/Fe bimetal; chemical dyestuff industry; catalytic reduction absorbable organic halogens (AOX); activated sludge; Pd/Fe bimetal; chemical dyestuff industry; catalytic reduction
Show Figures

Figure 1

MDPI and ACS Style

Xu, C.; Liu, R.; Zheng, W.; Lin, L.; Chen, L. Removal of AOX in Activated Sludge of Industrial Chemical Dyestuff with Bimetallic Pd/Fe Particles. Water 2021, 13, 1543. https://doi.org/10.3390/w13111543

AMA Style

Xu C, Liu R, Zheng W, Lin L, Chen L. Removal of AOX in Activated Sludge of Industrial Chemical Dyestuff with Bimetallic Pd/Fe Particles. Water. 2021; 13(11):1543. https://doi.org/10.3390/w13111543

Chicago/Turabian Style

Xu, Cancan, Rui Liu, Wei Zheng, Lichu Lin, and Lvjun Chen. 2021. "Removal of AOX in Activated Sludge of Industrial Chemical Dyestuff with Bimetallic Pd/Fe Particles" Water 13, no. 11: 1543. https://doi.org/10.3390/w13111543

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop