Removal of zinc, copper and lead by natural zeolite—a comparison of adsorption isotherms

Perić, Jelena; Trgo, Marina; Medvidović, Nediljka Vukojević

doi:10.1016/j.watres.2003.12.035

Cited by 501 publications

(231 citation statements)

References 16 publications

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“…With large size deposits and wide geographic distribution, clinoptilolites are considered as most abundant members of the 48 minerals in the zeolite group [18,27]. Clinoptilolite usually occurs in volcanic and sedimentary rocks [1,7].…”

mentioning

confidence: 99%

Zeolites versus Lead Toxicity

R¹

2015

J Bioequiv Availab

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mentioning

confidence: 99%

Zeolites versus Lead Toxicity

R¹

2015

J Bioequiv Availab

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“…The properties such as porosity, presence of alkaline and earth alkaline metallic cations in zeolites structure along with high mechanical and chemical resistance provide good adsorptive, cation exchange, and catalytic characteristics and make them desirable for wide variant of analytical purposes [50,51]. According to the results reported in this study, the adsorption mechanism of strontium ions on the pre-synthesized CuO NPs/Ag-clinoptilolite zeolite composite adsorbent can be demonstrated by three major possible theories including: (1) the formation of electrostatic or van-der-waals forces of Sr 2?…”

Section: Effect Of Temperaturementioning

confidence: 99%

Effective removal of radioactive 90Sr by CuO NPs/Ag-clinoptilolite zeolite composite adsorbent from water sample: isotherm, kinetic and thermodynamic reactions study

et al. 2016

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In this research, the natural zeolite named clinoptilolite (NCp) was considered as an applicable base structure for subsequent preparation and modification by pre-selected chemical agents to use for removal/adsorption goals in progress. To make Na-clinoptilolite form, the mentioned zeolite undergoes variations by treating with NaCl salt. Ion exchange procedure was utilized to imprint silver ions (Ag ? ) from silver (I) nitrate solution as silver precursor on the modified clinoptilolite zeolite structure to attain Ag-clinoptilolite zeolite. Tenorite (CuO) NPs have been then dispersed and deposited on the external surface of the pre-prepared Ag-clinoptilolite zeolite through impregnation method to prepare the CuO NPs/Ag-clinoptilolite zeolite as a novel composite adsorbent. A series of analyses techniques including SEM-EDAX, XRD and FT-IR were applied for characterization and identification of crystal structure, morphology and elemental composition of the synthesized samples. The removal and adsorption process of radioactive strontium-90 ( 90 Sr) by CuO NPs/Agclinoptilolite zeolite composite adsorbent was exploited under various experimental conditions including pH, amount of adsorbent and the contact time at room temperature and the final optimized procedure used for removal of probable presence of 90 Sr in water sample of Bushehr city. Adsorption isotherm models including Langmuir, Freundlich, Temkin, D-R, H-J and Hasley have been applied and equilibrium adsorption data was better fitted to the Freundlich, Temkin, H-J and Halsey isotherms. The reaction kinetic information was studied by utilizing pseudo first and second orders, Elovich and Intra particle diffusion kinetic models. The adsorption kinetics is finely described by the pseudo second-order model. The energy of activation E a calculated using the Arrhenius equation was found to be 44.75 kJ/mol. Further, the evaluation of the thermodynamic parameters such as DG 0 , DH 0 and DS 0 , denoted that adsorption process of 90 Sr was spontaneous and illustrates a chemical adsorption properties and exothermic nature of the adsorption. The obtained results revealed that 90 Sr ions were removed by CuO NPs/Agclinoptilolite zeolite composite under optimized conditions after 6 h with a yield more than 97 %.

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“…[3,7,8]. Technical and economic constraints often pose limitations on the industrial applicability of these methods especially in developing countries [6,9,10].…”

Section: Introductionmentioning

confidence: 99%

Sorption of Heavy Metal Ions (Cu2+ and Cd2+) From Simulated and Industrial Wastewaters Using Sugarcane Biomass

Opeolu

Fatoki

2017

Eco-Tech

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The widespread use of heavy metals in different manufacturing processes has resulted in their presence in the air, soil and aquatic ecosystems. Many manufacturing processes release their effluents into nearby streams and rivers due to non-availability of waste treatment technologies in the developing world. Industrialization has therefore been reported to be a major anthropogenic source of these elements and their compounds waterbodies. Conventional methods that are currently being used in the developed world (such as chemical precipitation, ultra-filtration, reverse osmosis, etc) are expensive and so, unaffordable to small-scale businesses prevalent in developing economies. The need for alternative, cheaper and available technologies therefore, cannot be over-emphasized. This study attempted to remove heavy metals (Cu 2+ and Cd 2+ ) from simulated and industrial (paint and textile) wastewaters using sugarcane biomass. A synthetic resin (Chelex) was used as control. Batch sorption experiments were conducted to assess the influence of contact time, adsorbent dose, adsorbate concentration, pH, agitation speed, temperature and particle size. Increases in the parameters (except particle size) gave corresponding increases in percentage adsorption of both metals. Optimal temperature for adsorption was achieved at 50 o C above which adsorption declined considerably. Experimental data for Cu 2+ and Cd 2+ fitted well into freundlich and langmuir isotherms. In textile effluent, 100% adsorption was achieved for both metals using sugarcane biomass in contrast to 89% and 91% for Cu 2+ and Cd 2+ respectively in chelex, a synthetic resin. Similarly, adsorption was 100% for both metals using the biosorbent. Sugarcane biomass may therefore be utilized for water and wastewater remediation in the developing world. Its biodegradability gives comparative advantage over alternative synthetic and expensive resins since its disposal will be more environmentally friendly.

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Removal of zinc, copper and lead by natural zeolite—a comparison of adsorption isotherms

Cited by 501 publications

References 16 publications

Zeolites versus Lead Toxicity

Zeolites versus Lead Toxicity

Effective removal of radioactive 90Sr by CuO NPs/Ag-clinoptilolite zeolite composite adsorbent from water sample: isotherm, kinetic and thermodynamic reactions study

Sorption of Heavy Metal Ions (Cu2+ and Cd2+) From Simulated and Industrial Wastewaters Using Sugarcane Biomass

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