Removal of diclofenac from water by in/out PAC/UF hybrid process

Abstract

Results from a lab-scale investigation of a hybrid in/out ultrafiltration and powdered activated carbon adsorption PAC/UF for removal of diclofenac (c= 5 mg/L) are presented. The efficiency of the process was compared for single pulse and continuous carbon dosing (PAC dose 5 mg/L) in dechlorinated tap water under fluxes of 87 and 135 L/(m h). For higher flux conditions, it was observed that single pulse dosing has an advantage over continuous dosing procedure when comparing cycle average removal efficiency. Increase of carbon dose under these conditions increased cycle average removal only to a limited extent. PAC dose above 15 mg/L did not give improvements of the removal. Hypothesis was made that non-effective carbon distribution might be the possible reason.

Consolidated vs new advanced treatment methods for the removal of contaminants of emerging concern from urban wastewater

“…The addition of a coagulant (4-15 mg FeCl 3 /L or 0.1-0.4 gFe/gPAC) improves the subsequent separation of the PAC by UF or sand filtration. The influence of different PAC dosing procedures in in/out driven PAC/UF process has recently been studied by Ivančev-Tumbas et al, (2017).…”

Chemical activation of Microcystis aeruginosa biomass: a promising approach for enhanced diclofenac sorption and water treatment

“…23 Various techniques have been explored for the removal of DCF from wastewater, including advanced oxidation processes, sonolysis, electrochemical degradation, molecular imprinted solid-phase extraction, photodegradation, biodegradation, coagulationflocculation, ozonation, use of ultrafiltration membranes and adsorptive removal. [24][25][26][27][28][29][30][31][32][33][34][35] One of these methods, adsorptive removal, has garnered a lot of interest due to its low cost and excellent efficacy. For the elimination of DCF, a number of adsorbents have been studied.…”

Advanced Treatment of the Municipal Wastewater by Lab-Scale Hybrid Ultrafiltration

“…This makes this process potentially attractive for water reuse and thus sustainable water management. The efficiency directly depends on the conditions under which it is performed and the properties of the process materials used (for example PAC particle size), the method of PAC dosing (single pulse and continuous) [13,14], and the method of coagulant application [12]. A process combining powdered activated carbon and ultrafiltration (PAC/UF) has been shown to be more effective in removing OMPs than a process combining coagulation and ultrafiltration [12][13][14][15].…”

“…The efficiency directly depends on the conditions under which it is performed and the properties of the process materials used (for example PAC particle size), the method of PAC dosing (single pulse and continuous) [13,14], and the method of coagulant application [12]. A process combining powdered activated carbon and ultrafiltration (PAC/UF) has been shown to be more effective in removing OMPs than a process combining coagulation and ultrafiltration [12][13][14][15]. However, when coagulation and the PAC/UF process were combined [12], coagulation was observed to contribute to the efficiency in terms of OMP removal.…”