Kinetics and mechanism of adsorption of methylene blue from aqueous solution by nitric-acid treated water-hyacinth

El-Khaiary, Mohammad I.

doi:10.1016/j.jhazmat.2006.12.058

Cited by 119 publications

(57 citation statements)

References 20 publications

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“…In agreement with a number of published data [52][53][54], intraparticle diffusion plots according to the Weber and Morris model (Eq. (14)) presented two successive linear regions, the first straight line showing a steeper slope than the second one (Fig.…”

Section: Intraparticle Diffusion Modelssupporting

confidence: 89%

“…The bi-linearity of the plots may be attributed to the existence of two different classes of pores in the biosorbent structure, i.e., macropores and micropores. The values of the corresponding intraparticle diffusion rate constants k i1 and k i2 ( Table 5) were in the range of [53,55] or, more frequently, superior to [52,54,[56][57][58] those given by others for a variety of sorbent-sorbate couples. The rate constants k i1 and k i2 characterizing diffusion of complex ions in 315-400 m diameter particles were somewhat higher than those determined for smaller granules.…”

Section: Intraparticle Diffusion Modelsmentioning

confidence: 73%

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Biosorption of hexacyanoferrate(III) complex anion to dead biomass of the basidiomycete Pleurotus mutilus: Biosorbent characterization and batch experiments

Chergui

Kerbachi

Junter

2009

Chemical Engineering Journal

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Section: Intraparticle Diffusion Modelssupporting

confidence: 89%

Section: Intraparticle Diffusion Modelsmentioning

confidence: 73%

Biosorption of hexacyanoferrate(III) complex anion to dead biomass of the basidiomycete Pleurotus mutilus: Biosorbent characterization and batch experiments

Chergui

Kerbachi

Junter

2009

Chemical Engineering Journal

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“…Adsorption kinetics was studied using a pseudo-firstorder model, pseudo-second-order model, and intraparticle diffusion model (El-Khaiary 2007). The description of the pseudo-first-order equation is the following:…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Preparation of Pyridinium-Functionalized Magnetic Adsorbent and Its Application for Nitrate Removal from Aqueous Solution

Wang

et al. 2015

Water Air Soil Pollut

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A novel magnetic pyridinium-functionalized mesoporous silica adsorbent (Fe 3 O 4 @SiO 2 @Py-Cl) was synthesized for nitrate removal from aqueous solutions. The adsorption performances were investigated by varying experimental conditions such as pH, contact time, and initial concentration. The adsorbent was characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, and magnetic hysteresis loops. The results showed that the adsorption equilibrium could be reached within 30 min and the kinetic data were fitted well by pseudo-second-order and intraparticle diffusion model. The adsorbent exhibited a favorable performance, and its maximum adsorption capacity calculated by the Langmuir isotherm model was 1.755 mmol/g. The nitrate adsorption mechanism was mainly controlled by the material through ion exchange of nitrate with chloridion, as determined by XPS. This study indicated that this novel pyridinium-functionalized mesoporous material had excellent adsorption capacity. Meanwhile, compared with other adsorbents, it could remove nitrate fast and easy to be collected by magnetic separation, showing great potential application for nitrate removal from aqueous solution.

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“…Aquatic macrophytes like water hyacinth have been extensively used for phytoremediation of water contaminated with dyes (Khaiary 2007) and metals like cadmium, arsenic, lead, and chromium (Agunbiade et al 2009). Hasan et al (2007) reported effectiveness of water hyacinth for sorption of zinc (II) and cadmium (II) from aqueous solutions up to a concentration of 6 and 2.5 mg/L, respectively.…”

Section: Introductionmentioning

confidence: 99%

Performance of aquatic plant species for phytoremediation of arsenic-contaminated water

2015

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This study investigates the effectiveness of aquatic macrophyte and microphyte for phytoremediation of water bodies contaminated with high arsenic concentration. Water hyacinth (Eichhornia crassipes) and two algae (Chlorodesmis sp. and Cladophora sp.) found near arsenic-enriched water bodies were used to determine their tolerance toward arsenic and their effectiveness to uptake arsenic thereby reducing organic pollution in arsenic-enriched wastewater of different concentrations. Parameters like pH, chemical oxygen demand (COD), and arsenic concentration were monitored. The pH of wastewater during the course of phytoremediation remained constant in the range of 7.3–8.4, whereas COD reduced by 50–65 % in a period of 15 days. Cladophora sp. was found to survive up to an arsenic concentration of 6 mg/L, whereas water hyacinth and Chlorodesmis sp. could survive up to arsenic concentrations of 2 and 4 mg/L, respectively. It was also found that during a retention period of 10 days under ambient temperature conditions, Cladophora sp. could bring down arsenic concentration from 6 to <0.1 mg/L, Chlorodesmis sp. was able to reduce arsenic by 40−50 %; whereas, water hyacinth could reduce arsenic by only 20 %. Cladophora sp. is thus suitable for co-treatment of sewage and arsenic-enriched brine in an algal pond having a retention time of 10 days. The identified plant species provides a simple and cost-effective method for application in rural areas affected with arsenic problem. The treated water can be used for irrigation

show abstract

Kinetics and mechanism of adsorption of methylene blue from aqueous solution by nitric-acid treated water-hyacinth

Cited by 119 publications

References 20 publications

Biosorption of hexacyanoferrate(III) complex anion to dead biomass of the basidiomycete Pleurotus mutilus: Biosorbent characterization and batch experiments

Biosorption of hexacyanoferrate(III) complex anion to dead biomass of the basidiomycete Pleurotus mutilus: Biosorbent characterization and batch experiments

Preparation of Pyridinium-Functionalized Magnetic Adsorbent and Its Application for Nitrate Removal from Aqueous Solution

Performance of aquatic plant species for phytoremediation of arsenic-contaminated water

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