A critical study of interactive fluoride adsorption by raw marine organisms and a synthetic organic 2-amino-3-cyano-4(4-nitrophenyl)-6-phenylpyridine as adsorbent tools

El‐Said, Ghada F.; Abdelrehim, El-sayed M.; Elba, Mohamed E.; Kawy, Sara M. H. Abdel

doi:10.1007/s10661-019-7465-5

Cited by 12 publications

(3 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16 The Δ S ° values of Cd( ii ) adsorption on C-ATP, C-ATP-SO 4 2− and C-ATP-Cl − are −9.39, 105.90 and 8.54 J mol −1 K −1 , respectively, indicating that the adsorption of Cd( ii ) on C-ATP proceeds with decreasing entropy, while Cd( ii ) adsorption on C-ATP-SO 4 2− and C-ATP-Cl − proceeds with increasing entropy. 30…”

Section: Resultsmentioning

confidence: 99%

A comparative study of Cd(ii) adsorption on calcined raw attapulgite and calcined aluminium hydroxide-modified attapulgites in aqueous solution

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

A comparative study of Cd(ii) adsorption on calcined raw attapulgite and calcined aluminium hydroxide-modified attapulgites in aqueous solution

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Raw marine (algae, bivalves, sea star, brittle star, and coral reef) adsorbents are used to remove fluoride from aqueous medium [57]. e efficacy of peel powders of Ananas comosus and Citrus sinensis to remove fluoride from water was above 90% at pH 6 for Citrus sinensis peel powder and above 90% at pH 4 for Ananas comosus peel powder for exposure of time for 60 min [58].…”

Section: Bionanocomposites and Carbon-based Adsorbentsmentioning

confidence: 99%

Comparison of Water Defluoridation Using Different Techniques

Fadaei

2021

International Journal of Chemical Engineering

View full text Add to dashboard Cite

Fluoride pollution in subsurface water is a significant problem for different nations across the world because of the intake of excessive fluoride caused by the drinking of the contaminated subsurface. Water pollution by flouride can be attributed to the natural and human-made agents. Increased levels of fluoride in drinking water may result in the irretrievable demineralization of bone and tooth tissues, a situation called fluorosis, and other disorders. There has long been a need for fluoride removal from drinking water to make it safe for human use. Among the various fluoride removal methods, adsorption is the method most popularly used due to its cheap cost, ease of utilization, and being a scalable and simple physical technique. According to the findings of this study, the highest concentration of fluoride (0.1–15.0 mg/L) was found in Sweden and the lowest (0.03–1.14 mg/L) in Italy. We collected the values of adsorption capacities and fluoride removal efficiencies of various types of adsorbents from valuable released data accessible in the literature and exhibited tables. There is still a need to find the actual possibility of using biosorbents and adsorbents on a commercial scale and to define the reusability of adsorbents to decrease price and the waste generated from the adsorption method. This article reviews the currently available methods and approaches to fluoride removal of water.

show abstract

“…However, some of these techniques are suffering from high cost with respect to employed materials, methodologies, and instrumentations [5]. On the other hand, adsorption technology has been extensively used in the treatment of wastewater of various toxic pollutants because of its great effectiveness, convenience of use, and simplicity of operation [12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effective removal of hexavalent chromium from water by sustainable nano-scaled waste avocado seeds: adsorption isotherm, thermodynamics, kinetics, and error function

Mahmoud

El‐Said

Ibrahim

et al. 2022

Biomass Conv. Bioref.

View full text Add to dashboard Cite

In the current investigation, an efficient low-cost nano-scaled material was prepared from waste avocado seeds (NASs) and employed as a sustainable nanosorbent for removal of hexavalent chromium ions. The adsorption and surface characteristics with respect to the availability of functional groups, basic component elements, and structural properties of NASs were achieved by different techniques. Analysis of NASs referred to the presence of carbon and oxygen contents providing 97.21%. The NASs particles were homogenously identified and ranged between 18.68 and 19.05 nm. The impact of various affecting adsorption parameters on hexavalent chromium ions removal was elaborated and optimized at pH 2.0, NASs dose 10 mg, contact time 30 min, and temperature 25 °C by the batch adsorption assay. Fifteen linear and nonlinear modeling tests were applied to evaluate the adsorption isotherms and arranged in the following fitting order: Tempkin < BET < Dubinin-Radushkevich < Generalized < Halsey ˂ Flory–Huggins < Freundlich < Harkins–Jura ˂ Langmuir for linear formulas and Weber-van Vliet < Langmuir < Generalized < Radke–Prausnitz (II) < Radke–Prausnitz (III) < Fritz-Schlunder IV < Baudu < Multilayer < Fritz-Schlunder V < Toth for nonlinear formulas with 2 to 5 parameters. Linear and nonlinear pseudo-second-order models, intraparticle diffusion, and Elovich models were also scrutinized, and both pore diffusion and film were similarly involved in the rate-limiting step. The values of ΔS° (0.21 kJ/mol), ΔH° (− 41.02 kJ/mol) and ΔG° (− 28.30 to − 19.97 kJ/mol) at high concentration of hexavalent chromium (50 mg L−1) and a temperature range of 20–60 °C reflected the disordering, spontaneously exothermic adsorption process. The activation energy (Ea) was also confirmed to include the diffusion process at the activation energy in the rate-limiting step. The potential application of NASs in hexavalent chromium removal from wastewater, seawater, and tap water as real aqueous matrices referred to excellent percentage removal values in the range from 98.44 to 98.86%. Based on the outlined results, one can deduce that excellent performance and efficiency for removal of high hexavalent chromium concentration at high temperature, low nanosorbent mass, and low pH from different aqueous matrices were accomplished by the evaluated NAS nanosorbent. Accordingly, the investigated NAS nanosorbent is recommended to apply in high stress industrial and wastewater treatment plants.

show abstract

A critical study of interactive fluoride adsorption by raw marine organisms and a synthetic organic 2-amino-3-cyano-4(4-nitrophenyl)-6-phenylpyridine as adsorbent tools

Cited by 12 publications

References 63 publications

A comparative study of Cd(ii) adsorption on calcined raw attapulgite and calcined aluminium hydroxide-modified attapulgites in aqueous solution

A comparative study of Cd(ii) adsorption on calcined raw attapulgite and calcined aluminium hydroxide-modified attapulgites in aqueous solution

Comparison of Water Defluoridation Using Different Techniques

Effective removal of hexavalent chromium from water by sustainable nano-scaled waste avocado seeds: adsorption isotherm, thermodynamics, kinetics, and error function

Contact Info

Product

Resources

About