Removal of chromium from synthetic wastewater by adsorption onto Ethiopian low-cost Odaracha adsorbent

Birhanu, Yohanis; Leta, Seyoum; Adam, Getachew

doi:10.1007/s13201-020-01310-3

Cited by 29 publications

(11 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…e maximum adsorption capacity of the Cr(VI) using the BMNC was found to be 98 mg/g. Since the value of R L lies between 0 and 1, the Langmuir model was favourable in this adsorption process [1]. As the value of n is greater than 1, the adsorption process is a physicochemical process [33].…”

Section: Study Of Adsorption Isothermsmentioning

confidence: 98%

“…Effect of Adsorption Time. e adsorption contact time varied from 30, 60, 90, 120, 150, 180, and 210 min at the fixed pH of 2, adsorbent dose of 1.25 g/L, and initial Cr ion concentration of 40 mg/L [1]. e rapidity of the process in the initial stage is due to the large active surface area available for metal ions adsorption [33].…”

Section: Individual Parameter Effects On Adsorption Processmentioning

confidence: 99%

“…Nowadays, di erent toxic organic, inorganic, and microbial contaminants have been recognized at basic levels in all water resources. Large water contamination is due to the large usage of organic solvents, hazardous industrial chemicals, heavy metals, textile dyes, detergents, soaps, fertilizers, pesticides, herbicides, pathogens, and paint pigments, which all nd their way into water resources [1,2]. Generally, contaminants like various heavy metals and dyes exist stable in the aqueous medium, which also causes serious damage to the water ecosystem, its ora-fauna, and the environment [3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and Characterization of Fe3O4-Bentonite Nanocomposite Adsorbent for Cr(VI) Removal from Water Solution

Adisu

Balakrishnan

Tibebe

2022

International Journal of Chemical Engineering

View full text Add to dashboard Cite

Bentonite-magnetite nanocomposite adsorbent (BMNC) was made and investigated for its adsorption removal of Cr(VI) from an aqueous solution. This adsorbent was prepared by the coprecipitation method from sodium bentonite (BNa) with iron chloride solution at controlled pH and under an inert atmosphere. These adsorbents were characterized by atomic absorption spectrophotometer (AAS), Brunauer–Emmett–Teller (BET), dynamic light scattering (DLS), scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) analyses. Particle size of BMNC was in the range of 15 to 95 nm as per DLS. The intercalation of magnetite nanoparticles onto the bentonite clay increased its specific surface area from 142 to 177 m2/g as per BET analysis. Experimental design optimization results in 96.5% of Cr(VI) removal from the water solution at optimized adsorption parameters viz., adsorption time of 101 min, pH of 1.95, adsorbent dose of 1.12 g/L, and initial Cr(VI) concentration of 36.2 mg/L. The results of these studies demonstrate that the BMNC performs well. Moreover, the adsorption of Cr(VI) onto the BMNC was found to be the best fit with Langmuir isotherm (R2 = 0.9984) and a maximum adsorption capacity of 98 mg/g. The kinetics of the adsorption process was found to be a pseudo-second-order model (R2 = 0.9912). The BMNC also showed favourable reusability for adsorbate Cr(VI) ions removal from the water solution.

show abstract

Section: Study Of Adsorption Isothermsmentioning

confidence: 98%

Section: Individual Parameter Effects On Adsorption Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Characterization of Fe3O4-Bentonite Nanocomposite Adsorbent for Cr(VI) Removal from Water Solution

Adisu

Balakrishnan

Tibebe

2022

International Journal of Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…Where, C o and C e are the initial and equilibrium liquid phase conc. of the Cu ion in mg/L, and V is known as the volume of the solution in Liter, W is the weight of the adsorbent that is used in g, and q e is known as the removal efficiency of the adsorbent in mg/g [12].…”

Section: Cu (Ii) Adsorption Experimentsmentioning

confidence: 99%

Removal of Copper metal from Industrial wastewater using GCC adsorbent

Gupta¹,

Shukla²,

Patel³

2022

IJRASET

View full text Add to dashboard Cite

An Activated carbon has been employed as a adsorbent in adsorption methods, which are widely now used by numerous researcher to remove major heavy metals from waste streams. Activated carbon are still a pricy commodity even though it is majorly use in the water and wastewater treatments industries. The demand for economically technology to remove major heavy metal from contaminated waters has recently sparked research into the development of affordable alternatives to commercial available activated carbon. The ability of glutaraldehyde cross link chitosan (GCC) co polymer to remove and recover copper (Cu (II)) from electroplating solution is examined in this study, along with the impacts of solutions chemistry on adsorption and desorption character of Cu (II) using chitosan-based resins. A GCC co polymer adsorbent was made with the help grafting medium molecular weight chitosan with glutaraldehyde at a specific weight ratio (1/17). (25 percent in H2O). within the parameters of 4–9 pH, 30–150 min of contact time, 25–200 mg/L of dosage, 30–150 mg/L of starting Cu (II) concentration (conc.). Batch tests were done to determine which settings were ideal for copper. Additionally, the effects of factors like adsorbent dosage, pH, contact time, and initial metal ions con were examined. For copper, the ideal conditions were 120 minute of contacts time, 150 gL-1 of adsorbent, 30 mgL-1 of starting Cu (II) conc. and pH 5. The relation between the conc. and the amount that adsorbent absorbed is shown by the adsorption isotherms. To elaborate adsorption kinetics we define pseudo first order and, the pseudo second orders kinetic models could be utilize.

show abstract

“…Because of the abundance of clays on the earth's surface and due to their ability to undergo transformations in different ways, these solids are involved in many applications: pharmaceuticals, petroleum, chemical, wastewater treatment, catalysis, etc (Boudriche et al 2021); consequently, clays have received considerable attention, especially as potential adsorbents for environmental research (Birhanu et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Removal performance for thermotolerant coliforms and fecal streptococci from dairy effluents by Kenadsa’s natural green clay (Bechar-Algeria) in a fixed-bed column

et al. 2021

View full text Add to dashboard Cite

This present work is a part of the liquid discharges treatment topic by studying the removal performance for thermotolerant coliforms (FC) and fecal streptococci (F.Strep) by a local natural light green clay from Kenadsa (Bechar-Algeria) under continuous adsorption processes in a fixed-bed column. The study estimated the clay adsorbing efficiency by the adsorption technique for bacteria contaminating the dairy effluent by determining the bacterial load before and after treatment. The mean log counts per 100 ml for FC and F.Strep were assessed by MPN method on liquid medium. The clay material characterizations were made through X-ray diffraction, X fluorescence spectrometry and Fourier transform infrared spectroscopy analysis. Besides, some parameters were estimated such as the breakthrough time tb (clay filter breakdown); the amount of the contaminating bacteria that was removed at the breakthrough time Xb and the exhaustion of disinfection capacity Xe; the total amount of contaminating bacteria flowing through the column Xtotal; and the total removal efficiency (Y). According to the XRD, XRF and FTIR results, the predominant mineral constituents were silicon dioxide, aluminum oxide, ferric oxide and magnesium oxide with rates of 59,44; 18,09; 7,79; and 3,87%, respectively, and hence, their classification among non-swelling clay minerals, illite is the major mineral group of this material. The results of the bacteriological analysis of raw dairy effluents showed an average bacterial load of 3,88 Log10 and 4,1 Log10 CFU/100 mL for FC and F.Strep, respectively, exceeding the thresholds set by the national and the international regulations. The results of the dairy effluents treated by the tested material have shown that the used clay has a relatively high adsorption property for the clay fixed-bed system (3 cm of bed height), expressed by a total removed efficiency Y (%) of FC and F.Strep used to evaluate the column performance ranging from 55 to 84%. It gives a higher log removal for FC and F.Strep (0.98–1.65 Log10) reported from the first adsorption process, and a breakthrough time ranged from 100 to 250 min, which was inversely proportional to the initial bacterial load of discharges and also linked to the nature of the bacterial contaminants. When the breakthrough occurs earlier, the column service life will be shortened. For the studied parameters, the results of treated effluent complied with national and WHO regulations for unrestricted agricultural irrigation, otherwise, as authorized effluents to be discharged into nature without risks. These preliminary results are very promising at laboratory scale as an innovative green technology, treatment method respecting the environment and opens up prospects for the future, where the modification or the optimization of operating conditions such as the bed height of the fixed bed for adsorption, the volumetric flow rate or the clay structure like the particle size distribution of the adsorbents, known as one of the adsorbent classes endowed with an antimicrobial property, can improve the column performance, and further, the removal or even more the disinfection process by adsorption method.

show abstract

Removal of chromium from synthetic wastewater by adsorption onto Ethiopian low-cost Odaracha adsorbent

Cited by 29 publications

References 37 publications

Synthesis and Characterization of Fe3O4-Bentonite Nanocomposite Adsorbent for Cr(VI) Removal from Water Solution

Synthesis and Characterization of Fe3O4-Bentonite Nanocomposite Adsorbent for Cr(VI) Removal from Water Solution

Removal of Copper metal from Industrial wastewater using GCC adsorbent

Removal performance for thermotolerant coliforms and fecal streptococci from dairy effluents by Kenadsa’s natural green clay (Bechar-Algeria) in a fixed-bed column

Contact Info

Product

Resources

About