Advanced landfill leachate treatment using iron-carbon microelectrolysis- Fenton process: Process optimization and column experiments

Wang, Liqun; Yang, Qi; Wang, Dongbo; Li, Xiaoming; Zeng, Guangming; Li, Zhijun; Deng, Yongchao; Li, Jun; Yi, Kaixin

doi:10.1016/j.jhazmat.2016.07.033

Cited by 92 publications

(12 citation statements)

References 35 publications

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“…It is known that the smaller the p value and the larger the F value of the response factor in the model, the more significant the effect of the response factor on the response variable [48]. It can be seen from Table 4 that the order of the effect of the three response factors on the flexural strength and flexural modulus is glycerin (C) > PE-g-MAH (A) > lubricant (B).…”

Section: Experimental Design and Resultsmentioning

confidence: 98%

A Method of Large-Scale Resource Utilization of Algae—Eutrophic Waste from Lake Chao, China: Preparation and Performance Optimization of Composite Packaging Materials

Zhao

Yan

et al. 2019

Sustainability

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In order to realize the resource utilization of bloom algae from Lake Chao, this study presents the use of fresh algae to improve the mechanical and biological properties of low-density polyethylene (LDPE). In this study, the algae and LDPE were used as raw materials, maleic anhydride grafted polyethylene (PE-g-MAH), polyethylene wax (PE-wax) and white oil, and glycerin were used as the compatibilizer, lubricant, and plasticizer, respectively. The single factor experiments were conducted with these three individual factors, and the response surface methodology technique was used to optimize the process conditions. In the single factor experiments, the mechanical properties of the composites increased with additions of PE-g-MAH, PE-wax/white oil, and glycerin. Both flexural strength and flexural modulus were maximized to optimize the preparation conditions. The optimum preparation conditions were found as follows: algae powder of 15.00 wt%, LDPE of 85.00 wt%, PE-g-MAH of 4.00 wt%, lubricant of 2.67 wt%, and glycerin of 3.00 wt%. This resulted in 11.60 MPa of tensile strength, 9.95 MPa of flexural strength, and 241.00 MPa of flexural modulus. The mechanical properties of composites were greatly improved compared with the absence of additives. In addition, compared with LDPE resin, the degradability of the composite was improved, and the weight loss rate was 7.73% after 6 months. The results recommended that the composites of the algae from Lake Chao and LDPE resin could be a useful material in the packaging field. Generally, the prepared composite particles can be used to produce foam products, packaging bags, or hard packing boxes with special shapes. It is more environmentally friendly, and more able to meet the challenges of sustainable development.

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Section: Experimental Design and Resultsmentioning

confidence: 98%

A Method of Large-Scale Resource Utilization of Algae—Eutrophic Waste from Lake Chao, China: Preparation and Performance Optimization of Composite Packaging Materials

Zhao

Yan

et al. 2019

Sustainability

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“…About 95.09% of the residual DON after microelectrolysis-Fenton oxidation and coagulative precipitation was further removed by the activated sludge reactor (T6), while only 28.14% of the residual DOC was reduced by the T6 section. According to the previous laboratory studies, optimum results for organic matter (COD and DOC) removal by microelectrolysis-Fenton oxidation related processes were in the range of 58.5%-80% [14,16,18,[21][22][23][24][25]. In this field-scale study, the quantities of DOC and DON removed by the microelectrolysis-Fenton oxidation accounted for 48.17% and 42.27% of the total DOC and DON content in the raw landfill leachate, respectively.…”

Section: Basic Physicochemical Characteristics Of the Treated Leachatementioning

confidence: 99%

“…Fenton oxidation as one of the AOPs has been extensively studied and used in mature landfill leachate treatment [11][12][13]. High reagent dosage of H 2 O 2 and Fe 2+ is required in Fenton oxidation process as to generate sufficient quantity of hydroxyl radicals, greatly raising the processing cost [14][15][16]. Fe-C (Fe/C) microelectrolysis was proposed as an efficient alternative for the production of Fe 2+ .…”

Section: Introductionmentioning

confidence: 99%

“…Recent laboratory-scale studies found that Fe/C microelectrolysis could both assisted the following treatment of Fenton oxidation without Fe 2+ addition and pH adjustment, and also significantly enhanced the biodegradability of wastewater [13,[16][17][18]. The two-stage advanced oxidation process of Fe/C microelectrolysis and Fenton oxidation may be appropriate to industrial application [8,16]. Field investigations in mature landfill leachate treatment are the best way to validate the practical treatment efficiency for the two-stage advanced oxidation process [19].…”

Section: Introductionmentioning

confidence: 99%

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Field-scale performance of microelectrolysis-Fenton oxidation process combined with biological degradation and coagulative precipitation for landfill leachate treatment

Zhao

Zhou

et al. 2019

E3S Web Conf.

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In order to verify the feasibility of Fe/C microelectrolysis-Fenton oxidation for mature landfill leachate treatment in industrial application, this study conducted the treatment processes at full-scale by physicochemical and spectral characterization. The full-scale studies showed that 48.17% of the dissolved organic carbon (DOC) and 42.27% of the dissolved organic nitrogen (DON) were removed by the microelectrolysis-Fenton oxidation process, respectively. Spectra analysis further suggested that the mature leachate was mainly composed of tryptophan-like and fulvic-like compounds. The combination of microelectrolysis and Fenton oxidation efficiently decomposed the aromatic C=C into carboxyl-C and decreased the molecular size of DOC, resulting in a dramatic reduce (97.1%-98.3%) of the fluorescence intensity. The DON removal by microelectrolysis-Fenton oxidation likely associated with the NH2-decomposition of tryptophan-like and aromatic compounds into NO3-N. The tryptophan-like compounds may play a dominant role in Ba binding, while Pb and Cd were likely bound to both the tryptophan-like and fulvic-like compounds. Above 60% of the heavy metals were removed in the microelectrolysis-Fenton oxidation section. Results above confirmed the effectiveness of Fe/C microelectrolysis-Fenton oxidation for mature landfill leachate treatment in industrial application.

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“…In order to remove organic pollutants from aqueous solutions, various technologies have been used, such as biological processes, electrochemical degradation, photocatalysis, ultrafiltration, and advanced oxidation processes (AOPs) (Kıranşan, Soltani, Hassani, Karaca, & Khataee, 2014;Liu et al, 2016;Wei et al, 2017). Among the various physicochemical processes, AOPs are considered to be more effective than many others, such as adsorption, flocculation, and nonradical based chemical oxidation (Wang et al, 2016). Recently, AOPs based on sulfate radicals (SO ⋅− 4 ) have become…”

Section: Introductionmentioning

confidence: 99%

Synthetic NiO catalyst‐assisted peroxymonosulfate for degradation of benzoic acid from aqueous solution

Huo

Zhou

Zhang

et al. 2020

Water Environment Research

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A heterogeneous NiO catalyst was prepared by a precipitation process using nickel nitrate with oxalic acid and tested for heterogeneous oxidation of benzoic acid (BA) in the presence of peroxymonosulfate (PMS). It was found that the synthetic NiO is highly effective in heterogeneous activation of PMS to produce sulfate radicals ( SO4·- ) and hydroxyl radicals (·OH), and also presents stable performance in the heterogeneous activation of PMS for BA degradation. Physicochemical properties of the NiO catalyst were characterized by several techniques, such as thermogravimetric analysis, Brunauer‐Emmett‐Teller, Fourier transform infrared spectroscopy, X‐ray diffraction, X‐ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. It was found that NiO and NiOOH were formed on the synthetic NiO catalyst and were stably distributed on the catalyst surface. Nearly 95% decomposition could be achieved in 30 min at the conditions of 500 ml 20 μM BA solution, 0.25 g catalyst, and [PMS]:[BA] = 30:1. The heterogeneous reactions, the effects of PMS concentration, and catalyst dosage on the BA degradation were investigated. The heterogeneous BA degradation reactions followed first‐order kinetics. Additionally, quenching experiments proved that the dominant radical in the solution was ·OH. The experiments results also showed that this approach is effective for the degradation of many other pollutants (such as tetracycline hydrochloride, 2, 4‐dichlorophenol, Acid orange 7, rhodamine B, and methyl red). Practitioner points A novel NiO material was fabricated for degradation of benzoic acid. The synthetic NiO catalyst comprised active NiO and NiOOH. The main radical for benzoic acid removal rate was ·OH. A plausible mechanism for catalyzed degradation of the benzoic acid was proposed.

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Advanced landfill leachate treatment using iron-carbon microelectrolysis- Fenton process: Process optimization and column experiments

Cited by 92 publications

References 35 publications

A Method of Large-Scale Resource Utilization of Algae—Eutrophic Waste from Lake Chao, China: Preparation and Performance Optimization of Composite Packaging Materials

A Method of Large-Scale Resource Utilization of Algae—Eutrophic Waste from Lake Chao, China: Preparation and Performance Optimization of Composite Packaging Materials

Field-scale performance of microelectrolysis-Fenton oxidation process combined with biological degradation and coagulative precipitation for landfill leachate treatment

Synthetic NiO catalyst‐assisted peroxymonosulfate for degradation of benzoic acid from aqueous solution

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