Adsorption of p-Dihydroxybenzene from Single, Binary and Ternary Aqueous Systems onto Activated Charcoal

The adsorption of para-dihydroxybenzene ( p-DHB) from aqueous multi-component systems onto activated charcoal was investigated. The study involved the adsorption of p-DHB from systems containing all combinations of p-DHB, phenol and 4-amino-1-naphthalene sulphonic acid sodium salt (ANSA) in aqueous solutions. Equilibrium isotherms were generated at three temperature values (30°C, 40°C and 55°C). As expected for exothermic physical adsorption, the adsorption of p-DHB from the single-component system and from the binary system containing ANSA decreased with increasing temperature. However, the adsorption of p-DHB from the binary system containing phenol increased with temperature. The effect of KCl and NaCl (at a concentration of 0.05 M) at 30°C was also investigated. The adsorption of p-DHB varied from one system to another. Both salts reduced the adsorption of p-DHB from the single and binary systems. The reduction in adsorption capacity (relative to the adsorption capacity in a salt-free system) attained only ca. 35% in the case of single-solute adsorption and ca. 20% and 33% from the binary systems containing p-DHB and phenol or ANSA, respectively. In contrast, the presence of KCl or NaCl had no appreciable effect on the adsorption of p-DHB from the ternary system.

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Adsorption of Lead and Nickel on to Expanded Graphite Decorated with Manganese Oxide Nanoparticles

Applied Sciences ◽

10.3390/app9245375 ◽

2019 ◽

Vol 9 (24) ◽

pp. 5375 ◽

Cited By ~ 9

Author(s):

Quoc Cuong Do ◽

Seonmi Choi ◽

Hyojeon Kim ◽

Seoktae Kang

Keyword(s):

Heavy Metals ◽

Aqueous Solutions ◽

Manganese Oxide ◽

Adsorption Capacity ◽

Binary Systems ◽

Expanded Graphite ◽

Oxide Nanoparticles ◽

Isothermal Adsorption ◽

Manganese Oxide Nanoparticles ◽

Single And Binary Systems

In this study, expanded graphite (EG) was decorated with manganese oxide nanoparticles (MONPs) by the hydrothermal method, and the newly formed composite (MONPs-EG) was applied as adsorbent for the removal of heavy metals from aqueous solutions. The comparative and competitive adsorption of Pb2+ and Ni2+ (0.01–1.00 mM) on MONPs-EG was investigated. Data from isothermal adsorption of single and binary systems suggested that both Pb2+ and Ni2+ were well described by the Langmuir isotherm, and the maximum adsorption capacities at 298 K were calculated at 0.278 and 0.113 mmol/g for Pb2+ and Ni2+, respectively. In binary systems, a dramatic decrease in adsorption capacity of Ni2+ was observed, while the adsorption capacity of Pb2+ was almost stable, indicating the favorable adsorption of Pb2+ over Ni2+ onto the prepared adsorbent. Kinetics studies of single and binary systems showed that a pseudo-second order model could explain the adsorption processes well. Thermodynamic analysis results demonstrated that the adsorption of these metal ions on the prepared adsorbent is spontaneous and exothermic in nature. The adsorption capacity of MONPs-EG increased significantly in the presence of humic acids. Overall, the results of this study suggest that MONPs-EG can be used effectively as an adsorbent for heavy metals removal from aqueous solutions.

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MODEL ISOTERM FREUNDLICH DAN LANGMUIR OLEH ADSORBEN ARANG AKTIF BAMBU ANDONG (G. verticillata (Wild) Munro) DAN BAMBU ATER (G. atter (Hassk) Kurz ex Munro)

Jurnal Sains Natural ◽

10.31938/jsn.v2i1.31 ◽

2017 ◽

Vol 2 (1) ◽

pp. 17 ◽

Cited By ~ 1

Author(s):

Murtihapsari Murtihapsari ◽

Bertha Mangallo ◽

Dini Dwi Handyani

Keyword(s):

Adsorption Capacity ◽

Activated Charcoal ◽

Langmuir Isotherm ◽

Physical Adsorption ◽

Regression Coefficients ◽

Maximum Adsorption Capacity ◽

Optimum Conditions ◽

Isotherm Equation ◽

Freundlich Isotherms ◽

Langmuir Isotherm Equation

Freundlich and Langmuir Isotherms Model by Active Chorcoal Adsorbent Bamboo Andong (G. verticillata (Wild) Munro) and Bamboo Ater (G. atter (Hassk) Kurz ex Munro) Diazinon insecticide adsorption by two types of adsorbent, namely activated charcoal bamboo andong (G. verticillata (Wild) Munro) and bamboo ater (G. atter (Hassk) Kurzex Munro) at optimum conditions determined the maximum adsorption capacity of both types of adsorbent. Data analysison the effect of concentration on the adsorption capacity was used Langmuir and Freundlich isotherms equation. It was obtained. That the curve of adsorption isotherms of the Langmuir isotherm better modeled with linear regression coefficients were relatively more approach 1 is R2 = 0,996 for both types of adsorbents. Langmuir isotherm equation obtained from adsorpsi maximum capacity of activated charcoal bamboo andong (G. verticillata (Wild) Munro) of 4.630 mg/g (1,433.10-5 mol/g) with K = 0,332 (Kmol/L)-1 and Eads at -2,750 kJ/mol, while the activated charcoal bamboo ater (G. atter (Hassk) Kurzex Munro) produce the maximum adsorption capacity of 1,786 mg/g (5,868.10-6 mol/g) with K = 0,202 (Kmol/L)-1 and Eads = -3,898 kJ/mol, so the adsorption of both types of adsorbents indicated experiencing a physical adsorption (physisorption / fisisorpsi).Keyword: G. verticillata (Wild) Munro, G. atter (Hassk) Kurz ex Munro, Adsorption, Diazinon, actived charcoal ABSTRAK Adsorpsi insektisida diazinon oleh dua jenis adsorben, yaitu arang aktif bambu andong (G. verticillata (Wild) Munro) dan bambu ater (G. atter (Hassk) Kurz ex Munro) pada kondisi optimum bertujuan untuk menentukan kapasitas adsorpsi maksimum dari kedua jenis adsorben. Analisis data pengaruh konsentrasi terhadap kapasitas adsorpsi digunakan persamaan isoterm Langmuir dan Freundlich. Berdasarkan data yang diperoleh, kurva isoterm adsorpsi lebih mengikuti model isoterm Langmuir dengan koefisien regresi linier yang relatif lebih mendekati 1 yaitu R2 = 0,996 untuk kedua jenis adsorben. Dari persamaan isoterm Langmuir diperoleh kapasitas adsorpsi maksimum arang aktif bambu andong (G. verticillata (Wild) Munro) sebesar 4,630 mg/g (1,433.10-5 mol/g) dengan K = 0,332 (Kmol/L)-1 dan Eads sebesar -2,750 kJ/mol, sedangkan arang aktif bambu ater (G. atter (Hassk) Kurz ex Munro) menghasilkan kapasitas adsorpsi maksimum sebesar 1,786 mg/g (5,868.10-6 mol/g) dengan K = 0,202 (Kmol/L)-1 dan Eads = -3,898 kJ/mol, sehingga adsorpsi kedua jenis adsorben diindikasikan mengalami adsorpsi secara fisik (physisorption/ fisisorpsi).Kata kunci : G. verticillata (Wild) Munro, G. atter (Hassk) Kurz ex Munro Adsorpsi, Diazinon, Arang aktif

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Competitive Adsorption of Cd (II) and Zn (II) in Single and Binary systems from Aqueous Solutions onto Cork Stopper Particles

Association of Arab Universities Journal of Engineering Sciences ◽

10.33261/jaaru.2019.26.1.003 ◽

2019 ◽

Vol 26 (1) ◽

pp. 17-27

Author(s):

Shahlaa E. Ebrahime ◽

Saja H. Alsaade

Keyword(s):

Experimental Data ◽

Binary System ◽

Metal Ions ◽

Binary Systems ◽

Isotherm Models ◽

Cork Stopper ◽

Langmuir Isotherm Model ◽

Simulated Wastewater ◽

Single And Binary Systems ◽

Metal Ions Removal

The possibility of using cork stopper particles as a biosorbent for the removal of Cd (II) and Zn (II) from simulated wastewater was studied. Batch sorption experiments of single and binary components systems were conducted as a function of pH, sorbent dosage; contact time, and agitation speed were investigated to optimize the best conditions for maximum of metal ions removal. The experimental data fitted slightly best to the Langmuir isotherm model than to Freundlich and Temkin isotherm models. The experimental data proved that the adsorption kinetic of Cd (II) and Zn (II) could be described by a pseudo-first order model. The sequence for metal ions removal in single and binary system was Zn (II)> Cd (II), the removal efficiency of both metals decreased in the binary system.

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The Isosteric Heat of Adsorption of Sr2+, Ce3+, Sm3+, Gd3+, Th4+ and UO22+ Ions on Activated Charcoal

Adsorption Science & Technology ◽

10.1177/026361749401100402 ◽

1994 ◽

Vol 11 (4) ◽

pp. 201-208 ◽

Cited By ~ 3

Author(s):

Riaz Qadeer ◽

Javed Hanif

Keyword(s):

Activation Energy ◽

Activated Charcoal ◽

Physical Adsorption ◽

Isosteric Heat ◽

Heat Of Adsorption ◽

Clapeyron Equation ◽

Temperature Changes ◽

Isosteric Heat Of Adsorption ◽

Adsorption Processes ◽

Increasing Temperature

The values of the isosteric heat of adsorption (qst) of Sr2+, Ce3+, Sm3+, Gd3+, Th4+ and UO22+ ions on activated charcoal have been calculated at different surface coverages and temperatures by applying the Clausius–Clapeyron equation. The variation of qst with surface coverage indicates the heterogeneous nature with varying activities of the activated charcoal surface. The behaviour of qst values with temperature suggests that two types of adsorption processes occur simultaneously; one with a small activation energy and the other with a large activation energy. A large increase in the qst values indicates that increasing temperature changes the physical adsorption process to chemisorption.

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Competitive Adsorption of Congo red in Single and Binary Systems Using a Low-cost Adsorbent

Journal of Health and Pollution ◽

10.5696/2156-9614-11.31.210912 ◽

2021 ◽

Vol 11 (31) ◽

Author(s):

Abdur-Rahim A. Giwa ◽

Isah A. Bello ◽

Mary A. Oladipo ◽

Deborah O. Aderibigbe

Keyword(s):

Aqueous Solution ◽

Binary System ◽

Congo Red ◽

Binary Systems ◽

Optimum Dose ◽

Reactive Black 5 ◽

Single System ◽

Parkia Biglobosa ◽

Equilibrium Data ◽

Single And Binary Systems

Background. Sawdust from Parkia biglobosa was prepared as an adsorbent for the adsorption of dye from aqueous solution. Objectives. The ability of sawdust to adsorb Congo red in a single dye system and binary dye system was examined. Methods. Effects of several variables (pH, contact time, initial dye concentration and adsorbent dose) were investigated and optimum conditions were established. The equilibrium data were subjected to kinetic and isotherm models. Results. Equilibrium time was observed at 600 mins while the optimum dose was 0.2 g and there was an increase in adsorption at low pH. The equilibrium data fitted the Freundlich isotherm model in both systems (coefficient correlation (R2) > 0.9). Harkin-Jura was the worst-fitted (R2 < 0.8). The qm in the single system (21.65) was lower than in BDS (27.17; 34.01). The values of 1/n show the heterogeneity on the surface of sawdust which reduced in the BDS. The increase in qm in the binary system showed that the presence of another dye (Reactive black 5) had a synergistic effect on the adsorption of Congo red. The kinetics of the process followed the pseudo-second-order model both in the single system and one of the binary systems. The dynamics of the process showed that the single system was non-spontaneous at low temperatures, endothermic and increased randomness on the surface of the adsorbent, while in the binary system, the process was exothermic and had little affinity for the adsorbent. Conclusions. Sawdust from Parkia biglobosa is a potential adsorbent for removing Congo red dye from aqueous solution in single and binary systems. Competing Interests. The authors declare no competing financial interests.

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Author response for "Adsorption performance of organic dyes in single and binary systems onto poly(itaconic acid)/magnetite sepiolite composite prepared via the green synthetic methods"

10.1002/cjce.24014/v2/response1 ◽

2020 ◽

Author(s):

Hucheng Ge ◽

Ze Zhang ◽

Xiaowei Zhao ◽

Hai Li ◽

Jingyi Sun ◽

...

Keyword(s):

Itaconic Acid ◽

Binary Systems ◽

Organic Dyes ◽

Synthetic Methods ◽

Author Response ◽

Adsorption Performance ◽

Single And Binary Systems

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X-ray and UV emission of the ultrashort-period, low-mass eclipsing binary system BX Trianguli

Astronomy and Astrophysics ◽

10.1051/0004-6361/201834116 ◽

2018 ◽

Vol 619 ◽

pp. A138

Author(s):

V. Perdelwitz ◽

S. Czesla ◽

J. Robrade ◽

T. Pribulla ◽

J. H. M. M. Schmitt

Keyword(s):

Binary System ◽

Light Curve ◽

Binary Systems ◽

Uv Light ◽

Close Binary ◽

Eclipsing Binary ◽

X Ray ◽

Uv Emission ◽

Low Mass ◽

Orbital Modulation

Context.Close binary systems provide an excellent tool for determining stellar parameters such as radii and masses with a high degree of precision. Due to the high rotational velocities, most of these systems exhibit strong signs of magnetic activity, postulated to be the underlying reason for radius inflation in many of the components. Aims.We extend the sample of low-mass binary systems with well-known X-ray properties. Methods.We analyze data from a singular XMM-Newton pointing of the close, low-mass eclipsing binary system BX Tri. The UV light curve was modeled with the eclipsing binary modeling tool PHOEBE and data acquired with the EPIC cameras was analyzed to search for hints of orbital modulation. Results.We find clear evidence of orbital modulation in the UV light curve and show that PHOEBE is fully capable of modeling data within this wavelength range. Comparison to a theoretical flux prediction based on PHOENIX models shows that the majority of UV emission is of photospheric origin. While the X-ray light curve does exhibit strong variations, the signal-to-noise ratio of the observation is insufficient for a clear detection of signs of orbital modulation. There is evidence of a Neupert-like correlation between UV and X-ray data.

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Effects of Electronegativity and Hydration Energy on the Selective Adsorption of Heavy Metal Ions by Synthetic NaX Zeolite

Materials ◽

10.3390/ma14154066 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4066

Author(s):

Xianyuan Fan ◽

Hong Liu ◽

Emmanuella Anang ◽

Dajun Ren

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Adsorption Capacity ◽

Heavy Metal Ions ◽

Binary Systems ◽

Adsorption Mechanism ◽

Selective Adsorption ◽

Hydration Energy ◽

Nax Zeolite ◽

High Electronegativity

The adsorption capacity of synthetic NaX zeolite for Pb2+, Cd2+, Cu2+ and Zn2+ in single and multi-component systems were investigated. The effects of electronegativity and hydration energy on the selective adsorption, as well as potential selective adsorption mechanism of the NaX zeolite for Pb2+, Cd2+, Cu2+ and Zn2+ were also discussed. The maximum adsorption capacity order of the heavy metals in the single system was Pb2+ > Cd2+ > Cu2+ > Zn2+, and this could be related to their hydration energy and electronegativity. The values of the separation factors (α) and affinity constant (KEL) in different binary systems indicated that Pb2+ was preferentially adsorbed, and Zn2+ presented the lowest affinity for NaX zeolite. The selective adsorption capacities of the metals were in the order, Pb2+ > Cd2+ ≈ Cu2+ > Zn2+. The trend for the selective adsorption of NaX zeolite in ternary and quaternary systems was consistent with that in the binary systems. Pb2+ and Cu2+ reduced the stability of the Si-O-Al bonds and the double six-membered rings in the NaX framework, due to the high electronegativity of Pb2+ and Cu2+ than that of Al3+. The selective adsorption mechanism of NaX zeolite for the high electronegative metal ions could mainly result from the negatively charged O in the Si-O-Al structure of the NaX zeolite, hence heavy metal ions with high electronegativity display a strong affinity for the electron cloud of the oxygen atoms in the Si-O-Al. This study could evaluate the application and efficiency of zeolite in separating and recovering certain metal ions from industrial wastewater.

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