Adsorption of heavy metals on natural zeolites: A review

Chemosphere, Journal Year: 2023, Volume and Issue: 328, P. 138508 - 138508

Published: March 25, 2023

Water pollution has jeopardized human health, and a safe supply of drinking water been recognized as worldwide issue. The increase in the accumulation heavy metals from different sources led to search for efficient environmentally friendly treatment methods materials their removal. Natural zeolites are promising removing contaminating water. It is important know structure, chemistry, performance removal water, natural design processes. This review focuses on critical analyses application distinct adsorption specifically, arsenic (As(III), As(V)), cadmium (Cd(II)), chromium (Cr(III), Cr(VI)), lead (Pb(II)), mercury(Hg(II)) nickel (Ni(II)). reported results heavy-metal by summarized, chemical modification acid/base/salt reagent, surfactants, metallic reagents analyzed, compared, described. Furthermore, adsorption/desorption capacity, systems, operating parameters, isotherms, kinetics were described compared. According analysis, clinoptilolite most applied zeolite remove metals. effective As, Cd, Cr, Pb, Hg, Ni. Additionally, an interesting fact variation between geological origins regarding sorption properties capacities suggesting that regions world unique.

Language: Английский

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A systematic review of metal organic frameworks materials for heavy metal removal: Synthesis, applications and mechanism

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 460, P. 141710 - 141710

Published: Feb. 4, 2023

Language: Английский

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Methods to prepare biosorbents and magnetic sorbents for water treatment: a review

Environmental Chemistry Letters, Journal Year: 2023, Volume and Issue: 21(4), P. 2337 - 2398

Published: May 4, 2023

Access to drinkable water is becoming more and challenging due worldwide pollution the cost of treatments. Water wastewater treatment by adsorption on solid materials usually cheap effective in removing contaminants, yet classical adsorbents are not sustainable because they derived from fossil fuels, can induce secondary pollution. Therefore, biological sorbents made modern biomass increasingly studied as promising alternatives. Indeed, such biosorbents utilize waste that would otherwise pollute systems, promote circular economy. Here we review biosorbents, magnetic sorbents, other cost-effective with emphasis preparation methods, types, mechanisms, regeneration spent adsorbents. Biosorbents prepared a wide range materials, including wood, bacteria, algae, herbaceous agricultural waste, animal waste. Commonly removed contaminants comprise dyes, heavy metals, radionuclides, pharmaceuticals, personal care products. Preparation methods include coprecipitation, thermal decomposition, microwave irradiation, chemical reduction, micro-emulsion, arc discharge. Adsorbents be classified into activated carbon, biochar, lignocellulosic clays, zeolites, peat, humic soils. We detail isotherms kinetics. Regeneration supercritical fluid desorption. also discuss exhausted adsorbent management disposal. found agro-waste remove up 68–100% while wooden, herbaceous, bacterial, marine-based 55–99% metals. Animal waste-based 1–99% The average removal efficiency modified around 90–95%, but some treatments, cross-linked beads, may negatively affect their efficiency.

Language: Английский

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A critical review of adsorption isotherm models for aqueous contaminants: Curve characteristics, site energy distribution and common controversies

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 329, P. 117104 - 117104

Published: Jan. 3, 2023

Language: Английский

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Green synthesis of iron oxide nanoparticles by Taguchi design of experiment method for effective adsorption of methylene blue and methyl orange from textile wastewater

Results in Engineering, Journal Year: 2023, Volume and Issue: 19, P. 101198 - 101198

Published: June 1, 2023

Since the beginning of industrial revolution, uncontrolled discharge wastewater from textile and dyeing industries into water bodies is environmentally challenging to humans ecosystem. Using Cola nitida (CN) leaves extract, Taguchi optimization method was successfully applied achieve green synthesis iron oxide nanoparticles (CN–Fe2O3NPs). Textural properties, nature surface functional groups, crystalline structure morphology CN–Fe2O3NPs were studied. The performance tested for methylene blue (MB) methyl orange (MO) removal wastewater. optimal area 125.31 m2/g achieved using CN extract volume (10 mL), precursor concentration (2 M), contact time (30 min) calcination temperature (600 °C). Overall, had highest effect than other parameters. characterization revealed presence hematite with Fe–O, Fe–O–Fe groups a regular-shaped porous material. Furthermore, adsorption capacity 530.406 527.835 mg/g obtained MB MO within 60 min nanoadsorbent dosage (25 mg/L), initial dye (100 mg/L) (50 reusability stability successful reuse after six cycles without any damage as corroborated by fourier transform infrared (FTIR) spectroscopy. experimental data suitably fitted Langmuir isotherm pseudo-second-order kinetic models denoting chemisorption monolayer process. thermodynamic parameters indicate an endothermic spontaneous Hence, high separation effectiveness against molecules good great potential synthesized in purification.

Language: Английский

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Multi-component Adsorption Isotherms: Review and Modeling Studies

Environmental Processes, Journal Year: 2023, Volume and Issue: 10(2)

Published: June 1, 2023

Abstract Adsorption is an important phenomenon widely used for the removal of contaminants. Several drinking water contaminants such as arsenic and fluoride, vanadium chromium, nickel, cadmium cobalt are found to coexist in nature multi-component mixtures water. Hence, modeling adsorption isotherms designing treatment systems has gained importance recently. However, review studies competitive limited. The current paper summarizes twenty-six isotherm models. Also, case several common mechanisms discussed. Furthermore, a analysis four models three commonly two-component systems, i.e., cadmium-nickel, nickel–cobalt, cadmium-cobalt, reported. Extended Langmuir isotherm, Competitive Langmuir–Freundlich Freundlich were applied study Cd, Ni, Co. goodness fit parameters constants estimated these factors influencing adsorption, various single models, their significance, limitations also discussed this article. Highlights • Twenty-six ten single-component compiled Factors affecting applications binary contaminant presented. Graphical

Language: Английский

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Algal-derived biochar as an efficient adsorbent for removal of Cr (VI) in textile industry wastewater: Non-linear isotherm, kinetics and ANN studies

Chemosphere, Journal Year: 2023, Volume and Issue: 316, P. 137826 - 137826

Published: Jan. 11, 2023

Language: Английский

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Removal of heavy metals in water using nano zero-valent iron composites: A review

Journal of Water Process Engineering, Journal Year: 2023, Volume and Issue: 53, P. 103913 - 103913

Published: June 11, 2023

Language: Английский

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Agricultural Solid Wastes Based Adsorbent Materials in the Remediation of Heavy Metal Ions from Water and Wastewater by Adsorption: A Review

Molecules, Journal Year: 2023, Volume and Issue: 28(14), P. 5575 - 5575

Published: July 21, 2023

Adsorption has become the most popular and effective separation technique that is used across water wastewater treatment industries. However, present research direction focused on development of various solid waste-based adsorbents as an alternative to costly commercial activated carbon adsorbents, which make adsorptive process more effective, popularising sustainable options for remediation pollutants. Therefore, there are a large number reported results available application raw or treated agricultural biomass-based alternatives aqueous-phase heavy metal ion removal in batch adsorption studies. The goal this review article was provide comprehensive compilation scattered literature information up-to-date overview current state knowledge, based papers utilised wide range raw, modified, waste ions. Metal pollution its source, toxicity effects, technologies, mainly via adsorption, have been reviewed here detail. Emphasis placed ions using by-product-based under physicochemical conditions. Information important influential parameters, such concentration, adsorbent dose, solution pH, temperature, importantly, characteristics removal, critically analysed here. Finally, from reviewed, future perspectives conclusions were presented, few directions proposed.

Language: Английский

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Adsorptive removal of malachite green dye from aqueous solution using Rumex abyssinicus derived activated carbon

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Sept. 7, 2023

Abstract The potential for malachite green dye saturated effluent to severely affect the environment and human health has prompted search effective treatment technologies. Thus, this study was conducted with goal of developing activated carbon from Rumex abyssinicus adsorptive removal an aqueous solution. Unit operations such as drying, size reduction, impregnation H 3 PO 4 , thermal activation were used during preparation carbon. An experiment designed considering four main variables at their respective three levels: initial concentration (50, 100, 150 mg/L), pH (3, 6, 9), contact period (20, 40, 60 min), adsorbent dosage (0.05, 0.01, 0.15 g/100 mL). Optimization batch adsorption process carried out using Response Surface methodology's Box Behnken approach. characterization described by SEM surface morphology cracks highly porous morphology, FTIR multi-functional groups O–H 3506.74 cm −1 3290.70 carbonyl group stretching aldehyde ketone (1900–1700 ), motion aromatic ring C=C (1543.12 –C–H (1500–1200 vibrational –OH (1250.79 C–O–C (1049.32 pHpzc 5.1, BET specific area 962.3 m 2 /g, XRD presence amorphous structure. maximum minimum efficiencies 99.9% 62.4% observed experimental conditions (100 mg/L, 0.10 mg/100 mL, 40 min) 3, 20 respectively. Langmuir, Freundlich, Toth, Koble-Corrigan models evaluate data, in which model found be best fit highest value R 0.998. In addition this, kinetic studies undertaken pseudo-first-order, pseudo-second-order, intraparticle diffusion, Boyd models, a result, pseudo-second-order proved have better among models. kinetics isotherm analysis revealed that nature homogenous monolayer surfaces driven chemosorption. Furthermore, thermodynamics feasible, spontaneous, endothermic. On other hand, reusability depicted fact can utilized five cycles negligible drop 99.9 95.2%. Finally, low-cost, environmentally benign, high capacity material derived stem could treat industrial effluents.

Language: Английский

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