Search

Pharmaceuticals and personal care products(PPCPs) were frequently detected in water bodies which were harmful to human health and environment. Three-dimensional electrocatalysis coupled biological aerated filter(3D-EBAF) was developed on the basis of biological aerated filter (BAF)，which could enhance remove rate of pharmaceuticals and personal care products(PPCPs). The effects of the current intensity and kinetic analysis on the removal of diclofenac and clofibric acid in the three-dimensional electrocatalysis coupled biological aerated filter(3D-EBAF) were investigated. Results indicated that (1)average 71.91% of diclofenac at 0.73 mA cm−2 and 58.92% of clofibric acid at 0.64 mA cm−2 could be removed in three-dimensional electrocatalysis coupled biological aerated filter(3D-EBAF), which represented increase by 42.79% and 17.52%, compared with the biological aerated filter(BAF).(2)the degradation of diclofenac and clofibric acid followed first-order kinetic plot in three-dimensional electrocatalysis coupled biological aerated filter(3D-EBAF) and the kinetic rate constant (k) reached a peak of 0.0086 and 0.0052 min−1 at 0.64 mA cm−2.(3)the contributions of removal routes, intermediate products and mechanism were explored. These results indicated that the adsorption, electrocatalytic oxidation, and biodegradation play a synergistic role in the removal of diclofenac and clofibric acid. Three-dimensional electrocatalysis coupled biological aerated filter (3D-EBAF) significantly enhanced the removal rates of pharmaceuticals and personal care products(PPCPs) compared to biological aerated filter(BAF). The application of three-dimensional electrocatalysis biological aerated filter(3D-EBAF) could achieve satisfactory results in the removal of pharmaceuticals and personal care products(PPCPs), which provided an environmentally acceptable and cost-effective technology for the treatment of pharmaceuticals and personal care products (PPCPs). [Display omitted] • 3D-EBAF enhanced the degradation of pharmaceuticals and personal care products. • Diclofenac and clofibric acid reached best removal effect at 0.64 mA cm−2. • Degradation of diclofenac and clofibric acid was followed first-order kinetic plot. • Adsorption and biodegradation played a greater synergistic effect in 3D-EBAF. [ABSTRACT FROM AUTHOR]

• 3DE-BAF with EPE from lithium slag was structured. • Higher removal rates of target NSAIDs were attained in 3DE-BAF than BAF. • Change of NSAIDs at different positions of 3DE-BAF were evaluated. • Combined effects of electrical current and NSAIDs on microbial community was studied. • 3D-EBCR is an alternative technology to treat target NSAIDs. Three-dimensional electrode biological aerated filter (3DE-BAF) with particulate bioelectrode from lithium slag was used to simultaneously remove diclofenac and clofibric acid from the synthetic domestic sewage, and the combined effects of electrical current and nonsteroidal antiinflammatory drugs (NSAIDs) on microbial community was analyzed. The results indicated that (1) the average diclofenac and clofibric acid removal efficiency in the 3DE-BAF firstly increased, attained the peak of 79.40 ± 6.74% and 69.50 ± 6.26% at 0.35 A, and then decreased to 71.82 ± 4.90% and 55.92 ± 5.17% at 0.40 A, respectively; (2) the concentration of the diclofenac and clofibric acid in 3DE-BAF gradually decreased with the increase of reactor height; (3) the current intensity and space position affected the microbial structure at the different level; (4) at the optimum current intensity, Thiothrix , Flavobacteriaceae , Halothiobacillaceae , Hydrogenophaga , and Comamonadaceae accounted for the main bacterial community for removal diclofenac and clofibric acid in the 3DE-BAF. [ABSTRACT FROM AUTHOR]