Physico-chemical treatments for removal of recalcitrant contaminants from landfill leachate

Kurniawan, Tonni Agustiono; Lo, Wai‐Hung; Chan, Yuk Sing Gilbert

doi:10.1016/j.jhazmat.2005.08.010

Cited by 572 publications

(268 citation statements)

References 113 publications

(139 reference statements)

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“…In recent years, different physicochemical techniques have been proposed for the treatment of these wastewaters. Specifically, for the removal of low biodegradable compounds, advanced oxidation processes represent a suitable option [8][9][10][11][12][13]. However, the development of effective and economic methods for the abatement of the high nitrogen loads of wastewaters still represents a big issue [14,15].…”

Section: Introductionmentioning

confidence: 99%

Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition

et al. 2016

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Abstract:The treatment of landfill leachate, due to its great polluting load, is a very difficult task. In particular, the abatement of high ammonium concentrations represents one of the main issues. Among the available techniques, struvite precipitation is an effective method for the removal and recovery of NH 4 + load. However, due to the lack of phosphorus and magnesium amounts, the struvite formation results in an expensive process in the leachate treatment. To overcome this issue, in the present work, we developed a simple and suitable method for ammonium removal by the multiple recycling of struvite decomposition residues. In this regard, a procedure for acid dissolution of struvite, produced by using industrial grade reagents, was initially defined. The effect of pH, temperature, and acid type was investigated. The experimental results proved the effectiveness of both hydrochloric and acetic acid, which allow a high and selective release of ammonium at T = 50 • C and pH = 5.5. The multiple reuse of decomposition products, combined with the supplementation of a small quantity of phosphorus and magnesium at molar ratios of n(N):n(Mg):n(P) = 1:0.05:0.05, guarantees stable NH 4 + abatement of about 82%. The proposed process allows a cost saving of around to 74% and can be easily applied in industrial treatment plants.

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Section: Introductionmentioning

confidence: 99%

Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition

et al. 2016

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“…Groundwater contamination due to the leachate from the landfill could lead to pollution of coastal water and consequently produce toxic effects to marine organisms (Chen and Liu 2006). Treatment method for landfill leachate depends on the characteristics of landfill leachate, technical applicability and constraints, effluent discharge alternatives, cost-effectiveness, regulatory requirements and environmental impact (Kurniawan et al 2006). To retain medium of pollutants present in the leachate, impermeable materials of natural or processed nature, such as clays, bentonite and geomembranes, are used as hydraulic barriers (Bellir et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Adsorption kinetic models for the removal of Cu(II) from aqueous solution by clay liners in landfills

Venkatesan

Rajagopalan

2016

Int. J. Environ. Sci. Technol.

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Liners are commonly used in engineered waste disposal landfill to minimize the potential contamination of the aquatic environment. The adsorption behavior of Cu(II) from aqueous solution onto clay admixed with various mix ratios of quarry fines was investigated. The amount of Cu(II) adsorption increases with increase in contact time. The copper removal efficiencies of the composite mixture gradually decrease from 94.53 % (raw clay) to 85.59 % (20 % of quarry fines with clay), and appreciable decrease in percent removal 75.61 % was found with 25 % of quarry fines with clay. The kinetic adsorption data were analyzed by pseudo-first-order, pseudo-second-order, BhattacharyaVenkobachar and Natarajan-Khalaf kinetic models to classify adsorption process mechanisms. Kinetic experimental data were good agreement with pseudo-secondorder kinetic model with the degree of fitness of the data (R 2 ) 0.9999 for the adsorption of Cu(II). The results revealed that quarry fines can be used with optimum of 20 % replacement of natural clay for removal of Cu(II) as a liner material in landfills.

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“…Moreover, as landfill ages, the leachate characteristic changes, and the treatment methods also changes. At acidogenic phase, landfill will release large amount of volatile fatty acid content [2].…”

Section: Introductionmentioning

confidence: 99%

Removal of Color, Suspended Solids, COD and Ammonia from Partially Stabilize Landfill Leachate by Using Iron Chloride through Coagulation Process

Zin¹,

Aziz²,

Adlan³

et al. 2013

IJET

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Abstract-Sufficient treatment of leachate is vital before it is discharged into receiving water bodies. MLS leachate is characterized as partially stabilized leachate. Therefore, coagulation is a fair treatment to degrade pollutants in MLS leachate. The aim of this study was to evaluate the optimum coagulation conditions of dose and pH of iron chloride for MLS leachate by using jar test. The influence of iron chloride dose, resulted in percentage removal of SS (97% at 1500 mg/L), color (95% at 1500 mg/L), COD (66% at 2000 mg/L) and NH3-N(13% at 3500 mg/L). While theaffect of pH, SS (94% at pH6), color(95% at pH6), COD(66% at pH 6) and NH3-N(56% at pH 6) were observed. Optimum dose and pH at 1500 mg/L and 6 were selected for SS, color and COD.Meanwhile,dose 3500 mg/L and pH 12 were selected for the optimum coagulation condition for NH3-N removal. Overall, treatment of the MLS leachate by the coagulation process with addition of IC was effective for SS, color and COD but weak in reducing NH3-N.

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Physico-chemical treatments for removal of recalcitrant contaminants from landfill leachate

Cited by 572 publications

References 113 publications

Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition

Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition

Adsorption kinetic models for the removal of Cu(II) from aqueous solution by clay liners in landfills

Removal of Color, Suspended Solids, COD and Ammonia from Partially Stabilize Landfill Leachate by Using Iron Chloride through Coagulation Process

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