Landfill leachate treatment by sequential combination of activated persulfate and Fenton oxidation

Electro-Persulfate Processes for the Treatment of Complex Wastewater Matrices: Present and Future

“…Besides its potential in PS activation, UV irradiation has also been employed in hybrid PS electro-activation processes to enhance the catalytic activity of heterogeneous metal-based persulfate activators [ 20 ]. The utilization of UV radiation to activate PS may present a disadvantage for dark wastewaters or effluents containing suspended solids, because radiation may be absorbed without activating PS.…”

“…The electro-persulfate process involving co-activation by UV irradiation was applied in the treatment of a washing machine effluent [ 26 ], a landfill leachate [ 20 ] and a greywater [ 13 ]. Ghanbari and Martínez-Huitle [ 26 ] applied a photoelectro-Fenton (PEF) process combined with PMS for the treatment of washing machine effluent.…”

Treatment of Landfill Leachates with Combined Acidification/Coagulation and the Fe0/H2O2 Process

“…Also, other studies suggest that advanced oxidation usage increases biodegradability [14,17]. Coagulation with FeCl 3 at pH 6.0, coupled with the Fe 0 /H 2 O 2 process, proved to have similar efficiency to other processes tested in the available literature, including electrochemical [11,20,36] and advanced oxidation [15][16][17]19,21,25] treatments.…”

“…The worldwide wastewater discharge regulations and standards have become stricter; hence, there is an urgent need to find an effective LL treatment method. Many researchers are investigating new and effective methods for LL treatment, such as sorption on magnetic particles [2] and other sorbents [8], reactive granular filters [9], the use of metallic iron [4,10,11] and other heterogeneous catalysts [12,13], Fenton (classical and solar) [14][15][16][17], electro-Fenton [18,19], and other electrochemical processes [11,[20][21][22][23][24], usage of different oxidants and their combination [25,26], microwaves [10], ultrasounds [27], membrane processes [28], hydrodynamic cavitation [29], microalgae [30], biofiltration [21,31], supercritical water oxidation [32], oscillating biological membrane photoreactors [33], anaerobic digestion [27,34], dynamic membrane bioreactors [35], bio-electro-Fenton [36], upflow sludge bed reactors [37], moving bed biofilm reactors [38], and the sequencing batch reactor [39]. Moreover, a few review articles have summarized the LL treatment methods [40][41][42]…”

Optimization of persulfate/iron(II)/UV-A irradiation process for the treatment of landfill leachate from Fez City (Morocco)

“…In addition, persulfate (S 2 O 8 2− ) is one of the strong oxidants widely used in the degradation of various organic contaminants from the water and wastewater. In fact, despite its disadvantages, such as the narrow working pH range, the high cost, the production of intermediate pollutants, and the iron sludge production in the case of Fe 2+ as a catalyst, previous studies have proved that PS was successfully applied in different oxidative systems (Ozone/ PS, UV/PS, Microwave/PS, Iron/PS, Aluminum/PS) for COD removal from landfill leachate [11][12][13][14][15]. Actually, this effectiveness is due to its high chemical reactivity, stability, and wide pH range in liquid phases.…”