Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics

Elmoubarki, R.; Mahjoubi, F.Z.; Tounsadi, Hanane; Moustadraf, J.; Abdennouri, Mohamed; Zouhri, Abdeljalil; Albani, A. El; Barka, Noureddine

doi:10.1016/j.wri.2014.11.001

Cited by 286 publications

(134 citation statements)

References 30 publications

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“…The results showed varies of pH had much affected on color removal efficiencies more than COD removal efficiencies. It was similar as reported in research of [11] that pH had affected on color adsorption capacity. In table 7, the optimum condition and removal efficiencies for adsorption processes were selected and concluded the performance of adsorption processes by consideration of effluent characteristics and standard.…”

Section: The Performance Of Adsorption Processsupporting

confidence: 89%

Combination Coagulation and Adsorption Processes for Treating Textile Wastewater in Household Industry

Yimrattanabavorn¹

2018

GEOMATE

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ABSTRACT:Textile wastewater is a considerable source of environmental contamination due to its strong color, high pH and chemical oxygen demand (COD), and low biodegradability. The discharge of textile wastewater not only has diverse aesthetic effects, but such discharge can be carcinogenic, mutagenic and generally detrimental to our environment. Thus, textile wastewater should be removed completely before they are discharged into received water. Many methods have been reported for treating textile wastewater, among which coagulation and adsorption are widely used processes due to their relatively simple operation and low cost and suitable for household industry. The aim of this study was using the combination coagulation and adsorption processes to treat textile wastewater in household-scale industry. Coagulation performance and removal efficiencies in COD and color from four varies sources of textile wastewaters were investigated. The effluent from coagulation was treated with adsorption. The adsorption isotherm and removal efficiencies were investigated. The results showed the combination processes had the overall COD were in the range of 72.9-93.8% and color removal efficiencies were in the range of 70.6-98.5%. The results of coagulation study were found that in some cases of wastewater were effective in color removal but failed in COD removal, in another case, had failed in color but were effective in COD removal efficiencies. The results showed varies of pH had much affected on color removal efficiencies more than COD removal efficiencies. The further experiments should be carried out to improve the combination removal efficiencies for application as suitable for textile household industry.

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Section: The Performance Of Adsorption Processsupporting

confidence: 89%

Combination Coagulation and Adsorption Processes for Treating Textile Wastewater in Household Industry

Yimrattanabavorn¹

2018

GEOMATE

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“…Thus, the high adsorption capacity at low pH is mainly due to the strong electrostatic interaction between the positively charged sites of adsorbent (presence of H + ) and the anions. However, lower sorption of the nitrates ions at alkaline pH could be attributed to the abundance of OH − ions which will compete with the pollutant for the same sorption sites [28].…”

Section: Effect Of Initial Solution Phmentioning

confidence: 99%

Effective Removal of Nitrates Ions from Aqueous Solution Using New Clay as Potential Low-Cost Adsorbent

Ouardi¹,

Qourzal²,

Alahiane³

et al. 2015

JEAS

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In the present study, we investigated the performance of clay mineral originated from a dam situated in Morocco (Agadir city), as natural, low-cost, alternative and eco-friendly adsorbent for removal of nitrates ions from aqueous solution within a batch process. The clay was characterized by X-ray diffraction, Scanning Electron Microscopy (SEM), Dispersive Energy of Spectroscopy (EDS), Fourier Transform Infrared (FTIR) and surface area analysis (BET). The effects of various experimental parameters are examined such as contact time, initial concentration of pollutant, adsorbent mass and solution pH. The removal of nitrate was 71.89% at natural pH (pH = 5.1) using 1 g/l of adsorbent in 500 ml of nitrate solution having initial concentration of 300 mg/l (effect of contact time). Adsorption kinetic study revealed that the adsorption process followed first order kinetic. Theoretical correlation of the experimental equilibrium adsorption data for the NitrateNew Clay system was properly explained by the Langmuir isotherm model. The maximum adsorption capacity was Qm, exp = 244.06 mg/g at 20˚C and at natural pH (with Q m, cal = 250 mg/g). An increase in adsorbent dosage increased the percent removal of nitrate, R = 1 g/l was considered as optimum dose and was used for further study. The pH heavily affected the adsorption capacity, and the percentage removal was found to decrease with increase in pH. The obtained results indicated that this New Clay (NC) was very good adsorbent for 3 NO − , interesting alternative material with respect to more costly adsorbent used, and could be used as a highly efficient adsorbent for the separation of nitrate from drinking or waste water.

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“…Due to the inability to widely used, arises the need of searching the cost effective substitutes with high sorption capacity. Such sorbents are: clays, peat, brown coal, zeolites, composts and metallurgical wastes [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Use of metallurgical dust for removal chromium ions from aqueous solutions

Pająk

Dzieniszewska

Kyzioł-Komosińska

et al. 2018

E3S Web of Conferences

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Abstract. The aim of the study was to determine the potential for the application of dust from steel plant as an effective sorbent for removing Cr(III) and Cr(VI) in the form of simple and complex ions -Acid Blue 193 dye from aqueous solutions. Three isotherms models were used to interpret the experimental results namely: Langmuir, Freundlich, and DubininRadushkevich. Estimated equations parameters allowed to determine the binding mechanism. Based on laboratory studies it was found that the dust was characterized by high sorption capacities for Cr ions and dye from the aqueous solution. The sorption capacity of the dust for Cr(III) and Cr(VI) ions depended on the degree of oxidation, pH of solution and kind of anion and changed in series: Cr(III)-Cl pH=5.0> Cr(III)-SO4 pH=5.0> Cr(III)-Cl pH=3.0> Cr(III)-SO4 pH=3.0> Cr(VI) pH=5.0> Cr(VI) pH=3.0. Dust was also characterized by a high maximum sorption capacity of dye at a range of 38.2 -91.7 mg/g, depending on the dose of dust. Based on the study it was found that dust from a steel plant, containing iron oxides, can be used as low-cost and effective sorbent to remove pollutions containing chromium ions, especially from acidic wastewater.

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Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics

Cited by 286 publications

References 30 publications

Combination Coagulation and Adsorption Processes for Treating Textile Wastewater in Household Industry

Combination Coagulation and Adsorption Processes for Treating Textile Wastewater in Household Industry

Effective Removal of Nitrates Ions from Aqueous Solution Using New Clay as Potential Low-Cost Adsorbent

Use of metallurgical dust for removal chromium ions from aqueous solutions

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