Pretreatment of stabilized leachate using ozone/persulfate oxidation process

Amr, Salem S. Abu; Aziz, Hamidi Abdul; Adlan, Mohd Nordin; Bashir, Mohammed J.K.

doi:10.1016/j.cej.2013.02.038

Cited by 134 publications

(35 citation statements)

References 46 publications

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“…Recently it has received an attention in water and wastewater treatment (Huling and Pivetz, 2006;Shiying et al, 2009) reporting on persulfate applications for color and COD removal, as well as biodegradability improvement for different types of landfill leachate (Shiying et al, 2009;Yang et al, 2011). Because the effectiveness of persulfate alone in leachate treatment is relatively weak (Abu Amr et al, 2013a), persulfate requires additional advanced oxidation techniques to enhance its effectiveness for high organic content removal from old leachate. The mechanisms of persulfate activation is to initiate sulfate radical which has high oxidation potential (E°= 2.7 V) (Renaud and Sibi, 2001).…”

Section: Introductionmentioning

confidence: 97%

Effect of persulfate and persulfate/H2O2 on biodegradability of an anaerobic stabilized landfill leachate

et al. 2015

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Section: Introductionmentioning

confidence: 97%

Effect of persulfate and persulfate/H2O2 on biodegradability of an anaerobic stabilized landfill leachate

et al. 2015

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“…The effects of pH variation on the oxidation process were investigated, optimum pH value was determined by applying different pH values between 3 and 11. The pH was adjusted using 5 M of NaOH and H 2 SO 4 reagent (Abu Amr et al 2013a). The effect of reaction time was studied between 30 and 240 min.…”

Section: Methodsmentioning

confidence: 99%

“…Also, with increasing landfill age, the produced leachates are characterized by the presence of substantial quantities of recalcitrant, difficult-to-treat, 'hard' COD (the chemical oxygen demands) compounds. The degradation of organic matter, using various physiochemical treatment applications such as electrochemical oxidation (Bueno & Bertazzoli 2005), coagulation-flocculation, chemical precipitation and activated carbon adsorption, combination of coagulation, flocculation and chemical oxidation, advanced oxidation and ozonation (Abu Amr et al 2014, 2013a, 2013bKurniawan et al 2006;Lopes & Zamora 2005;Monje & Velasquez 2004;O'Melia et al 1999;Rivas et al 2004;Tatsi et al 2003) were conducted and reported in literature. In the literature, it is reported that conventional biological treatment is not an effective in treating leachates with a high concentration of organics (Renou et al 2008) and this type of leachate needs to be previously treated to become applicable for biological process.…”

Section: Introductionmentioning

confidence: 99%

“…which has powerful oxidation potential (Deng et al 2013;Gu et al 2011;Leng et al 2014;Lin et al 2011). Several applications of persulfate activation for leachate treatment have been reported such as H 2 O 2 , O 3 , Al 2 SO 4 , FeSO 4, heat, UV radiation and high pH (Abu Amr et al 2018, 2013aGao et al 2012;Hilles et al 2016Hilles et al , 2015Kattle & Dulova 2017;Shiying et al 2009). Persulfate (S 2 O 8 2¯) is the newest oxidant used in in situ chemical oxidation (ISCO) for groundwater and soil cleanup (Huling & Pivetz 2006…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Persulfate Oxidation on the Biodegradability of Concentrated Anaerobic Stabilized Leachate

Hilles¹,

Amr²,

Alkarkhi³

et al. 2019

JSM

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Anaerobic stabilized landfill leachate was treated by persulfate (S 2 O 8 2− ) oxidation. The effect of three factors namely; persulfate dosage, pH and reaction time on COD and NH 3 -N removals; was studied. The results of analysis of variance (ANOVA) showed that the selected factors significantly affected the percentage of COD and NH 3 -N removals. Furthermore, the maximum removal was achieved at 60 min of persulfate oxidation, a COD/S 2 O 8 2− ratio (1 g/4.2 g), and pH7, the percentage of removals for COD and NH 3 -N were 45% and 55%, respectively. The effect of persulfate oxidation on the biodegradability of leachate was also investigated. The results showed that the BOD 5 /COD ratio improved from 0.09 to 0.1. The oxidation enhanced the biodegradable (COD bi ) from 36% to 57%. Hence, persulfate is suitable to pre-treat highly-concentrated stabilized leachate. This process should follow the organic degradation and ammonia removal followed by biological treatment processes. ABSTRAK Larut lesap stabil anaerob telah dirawat secara pengoksidaan persulfat ((S 2 O 8 2−). Kesan tiga faktor iaitu dos persulfat, pH dan masa tindak balas terhadap penyingkiran COD dan NH 3 -N telah dikaji. Ujian ANOVA menunjukkan faktor tersebut memberi kesan yang bererti terhadap peratusan penyingkiran COD dan NH 3 -N. Seterusnya penyingkiran maksimum COD dan NH 3 -N masing-masing sebanyak 45% dan 55% telah dicapai pada masa 60 minit, nisbah COD/S 2 O 8 2− pada 1 g/4.2 g dan pada pH7. Kesan pengoksidaan persulfat terhadap keterbiodegredan larut lesapan juga dikaji. Hasil kajian menunjukkan nisbah BOD 5 /COD meningkat daripada 0.9 kepada 1.0. Pengoksidaan telah meningkatkan biodegredasi (COD bi ) dari 36% kepada 57%. Dengan ini, persulfat sesuai merawat larut lesap stabil yang berkepekatan tinggi. Proses ini seharusnya diikuti dengan degredasi bahan organik dan penyingkiran ammonia melalui proses rawatan secara biologi.

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“…Due to these refractory compounds, landfill leachate can be a source of long term contamination for soil and groundwater [3, 6, 7]. Different methods, including biological, physical and chemical oxidation processes, have been reported for leachate treatment [8-12]. …”

Section: Introductionmentioning

confidence: 99%

Degradation of landfill leachate compounds by persulfate for groundwater remediation

Zhong

Tian

Yang

et al. 2017

Chemical Engineering Journal

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In this study, batch and column experiments were conducted to evaluate the feasibility of using persulfate oxidation to treat groundwater contaminated by landfill leachate (CGW). In batch experiments, persulfate was compared with H2O2, and permanganate for oxidation of organic compounds in CGW. It was also compared with the potential of biodegradation for contaminant removal from CGW. Persulfate was observed to be superior to H2O2 and permanganate for degradation of total organic carbon (TOC) in the CGW. Conversely, biodegradation caused only partial removal of TOC in CGW. In contrast, persulfate caused complete degradation of the TOC in the CGW or aged CGW, showing no selectivity limitation to the contaminants. Magnetite (Fe3O4) enhanced degradation of leachate compounds in both CGW and aged CGW with limited increase in persulfate consumption and sulfate production. Under dynamic flow condition in 1-D column experiments, both biodegradation and persulfate oxidation of TOC were enhanced by Fe3O4. The enhancement, however, was significantly greater for persulfate oxidation. In both batch and column experiments, Fe3O4 by itself caused minimal consumption of persulfate and production of sulfate, indicating that magnetite is a good persulfate activator for treating CGW in heterogeneous systems The results of the study show that the persulfate-based in-situ chemical oxidation (ISCO) method has great potential to treat the groundwater contaminated by landfill leachate.

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Pretreatment of stabilized leachate using ozone/persulfate oxidation process

Cited by 134 publications

References 46 publications

Effect of persulfate and persulfate/H2O2 on biodegradability of an anaerobic stabilized landfill leachate

Effect of persulfate and persulfate/H2O2 on biodegradability of an anaerobic stabilized landfill leachate

The Effect of Persulfate Oxidation on the Biodegradability of Concentrated Anaerobic Stabilized Leachate

Degradation of landfill leachate compounds by persulfate for groundwater remediation

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