Removal of nickel(II) ions from aqueous solution using crab shell particles in a packed bed up-flow column

Vijayaraghavan, K.; Jegan, J.; Palanivelu, K.; Velan, M.

doi:10.1016/j.jhazmat.2004.06.014

Cited by 189 publications

(90 citation statements)

References 14 publications

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“…(15) in conjunction with the initial and boundary conditions, Eqs. (20)(21)(22), were solved by the General Collocation Software for Partial Differential Equations (PDECOL) package [35], where y f ( ,Â) is obtained by solving Eq. (17) and the equilibrium is given by the Langmuir isotherm.…”

Section: Saturationmentioning

confidence: 99%

“…Biosorption in packed bed column has been widely investigated and seems to represent the most effective operating system [20][21][22][23][24][25][26]. Nevertheless, CSTR (continuous stirred tank reactor) allows handling suspensions, permits the combination of flow schemes and does not need immobilization of the biomass to maintain the integrity of the adsorbent particles, if there is a biosorbent filtration step.…”

Section: Introductionmentioning

confidence: 99%

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Cadmium uptake by algal biomass in batch and continuous (CSTR and packed bed column) adsorbers

Vilar¹,

Santos²,

Martins³

et al. 2008

Biochemical Engineering Journal

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a b s t r a c tIn this work, the properties of marine algae Gelidium, algal waste from agar extraction industry and a composite material were investigated for cadmium(II) biosorption. Equilibrium experiments were performed at three pH values (4, 5.3 and 6.5). Equilibrium data were well described by the Langmuir and Langmuir-Freundlich isotherms. Two models predicting the pH influence in the cadmium biosorption (discrete and continuous models) have been developed in order to better describe the equilibrium. The continuous model also considers a heterogeneous distribution of carboxylic groups, determined by potentiometric titration. The results of batch kinetic experiments performed at different pH values were well fitted by two mass transfer models and the homogeneous diffusion coefficients for the cadmium ions inside the biosorbent were obtained. Continuous stirred tank reactor (CSTR) and packed bed column configurations were also examined for the biosorption of cadmium ions. A strong acid (0.1 M HNO 3 ) was used as eluant to regenerate the biosorbents in the column. Several mass transfer models were applied with success to describe the biosorption process in batch mode, CSTR and fixed bed column.

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Section: Saturationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cadmium uptake by algal biomass in batch and continuous (CSTR and packed bed column) adsorbers

Vilar¹,

Santos²,

Martins³

et al. 2008

Biochemical Engineering Journal

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show abstract

“…Hamdaoui (2006) [209] and Vijayaraghavan et al (2004) [213] have both stated that with the increase in bed height, the mass of the adsorbents increase and thus the surface area would also increase, which in turn provides an increase in the active binding site numbers, leading to a larger sorption capacity. Foo and Hameed (2012) have both stated that at lower adsorbent bed height an axial dispersion phenomenon predominates and reduces the diffusion of adsorbate molecules [210].…”

Section: Effect Of Bed Heightmentioning

confidence: 99%

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

Sulyman

Namieśnik

Gierak

2017

Pol. J. Environ. Stud.

209

112

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A major threat to the comfort of human life has been imposed by increased industrialization and urbanization. The generation and disposal of huge amounts of toxic materials and pollutants have heavily contaminated our environment. Some Organics such as synthetic dyes (SD) and heavy metals (HM) are becoming increasingly prevalent as the most dangerous pollutants in soil and surface water environments. They are causing great concern worldwide due to their toxicity to many life forms.Environmentally friendly utilization of agricultural by-products/waste materials either as raw materials or in production of so-called activated carbons (AC) is an important issue. Because it is apparent from our literature review that the main factors characterizing these materials are their affordability, local availability, and efficiencies in removing many unwanted toxics and pollutants, they therefore could be utilized instead of more conventional but expensive adsorbent materials, particularly in developing countries where many industries lack appropriate individual sewage treatment systems; even where they exist, they lack satisfactory functioning and maintenance because of the lack of good budgets.A number of case studies are supplied in this review. These case studies have pointed to the efficient removal of SD/HM ions from aqueous solutions by the agricultural by-products/wastes in the form of a raw material, signifying spent tea leaves (STL) as a good example. Besides, the efficient removal of such ions by AC produced from these agricultural by-products/wastes has also been given in detail, suggesting a variety of AC agricultural by-products/wastes sources. Both kinds are widely used adsorbents in the treatment of wastewaters. Our review has shown that these adsorbents are characterized by many exceptional physical and chemical features that make them widely used adsorbents in the treatment of wastewaters. The adsorption efficiencies by these substances were also affected by the characteristics of AC, which depend on the physical and chemical properties of the precursor (i.e., agricultural by-products/wastes) as well as on the activation method applied, which is either chemical or physical. The structural properties of the resulting

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“….min -1 , respectively. A larger value for k ads implies that even at lower bed heights, breakthrough will occur at a later time whereas a smaller k ads value needs a higher bed height to avoid breakthrough (14).…”

Section: Effect Of Bed Depthmentioning

confidence: 99%

Determination of Breakthrough Curves for the Uptake of Fe3 Using Magmatic Rock Material in Fixed Bed Column

Nuhoğlu¹,

Oğuz²

2016

Fourth International Conference on Advances in Applied Science and Environmental Technology- ASET 2016

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Abstract-The breakthrough curves of the particles of magmatic rock to uptake Fe 3+ ions from aqueous solution were investigated using a fixed-bed sorption column. The effect of inlet Fe 3+ concentration, feed flow rate, bed height, initial solution pH and particle size on the breakthrough characteristics of the sorption system were investigated. 1.IntroductionExcessive concentrations of Fe +3 in public water supplies causes turbidity, unpleasant taste and odor. It imparts a brownish color to laundered cloths and stains plumbing fixtures. It also causes difficulties in distribution systems by supporting the growth of iron bacteria, resulting in the clogging of pipes (1). Therefore, the presence of Fe +3 is objectionable in certain industries such as food, textile and paper (2). Up to now, various traditional treatment technologies including chemical precipitation, filtration, ion exchange and activated carbon adsorption on a solid heterogeneous surface are widely applied (3-5). These methods, however, display one or more limitations, such as ineffective, expensive, generation of secondary pollution and narrow appliance range (6-8).Magmatic rock is an economical rock, and is included to light concrete category (9). These rocks are widely used as building stone in low storeyed buildings and especially in historical building in the past (10). One of the main advantages of Fe +3 removal using magmatic rock over the other chemical treatment methods is that any chemical sludge does not produce after sorption. The purpose of this study is to investigate the performance of magmatic rock particles in the removal of Fe +3 from aqueous solutions in a fixed-bed coloumn. The effect of influent Fe +3 concentration, pH, particle size, bed height, and flow rate on the column performance and shape of the breakthrough curves was evaluated. Kinetic column model (Bed depth service time (BDST)) was applied to describe the dynamic performance of the sorption process. 2.Material and Methods Sorbent preparationThe magmatic rock particles were grounded in a blender and sieved to obtain the particle sizes such as 0.25

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Removal of nickel(II) ions from aqueous solution using crab shell particles in a packed bed up-flow column

Cited by 189 publications

References 14 publications

Cadmium uptake by algal biomass in batch and continuous (CSTR and packed bed column) adsorbers

Cadmium uptake by algal biomass in batch and continuous (CSTR and packed bed column) adsorbers

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

Determination of Breakthrough Curves for the Uptake of Fe3 Using Magmatic Rock Material in Fixed Bed Column

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