A novel application of building demolition waste for removal benzene from aqueous solutions

A novel application of building demolition waste for removal benzene from aqueous solutions. In this research, demolition waste from buildings has been studied for possible use as benzene removal adsorbent from aquatic solution. The effect of adsorbent dosage, contact time, initial benzene concentration, and initial pH on benzene adsorption capacity have been investigated in the batch adsorption experiments. The adsorption effects initially happened very rapidly and achieved equilibrium within 180 min. Benzene removal was observed to decrease by an increase in the initial concentration of benzene of 300–700 mg·L–1, an increase in the adsorbent dose of 0.4–2.4 g per 100 mL, where an optimum adsorbent dose equal to 1.2 g per 100 mL was found. The potential of adsorption increases with pH 3.0–7.0 to reach the maximum removal efficiency at pH 6.0. The findings showed that equilibrium data were adequately adapted and correlated with the Freundlich isotherm models. The average percentage of the removal at room temperature was about 98%. Results suggest that building demolition waste can be used effectively in industrial wastewater treatment for the removal of aromatic hydrocarbon, benzene, as a low-cost option.

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Effective Biosorption of Nickel(II) from Aqueous Solutions UsingTrichoderma viride

Journal of Chemistry ◽

10.1155/2013/716098 ◽

2013 ◽

Vol 2013 ◽

pp. 1-7 ◽

Cited By ~ 17

Author(s):

P. Sujatha ◽

V. Kalarani ◽

B. Naresh Kumar

Keyword(s):

Aqueous Solutions ◽

Metal Ion ◽

Low Cost ◽

Trichoderma Viride ◽

Toxic Metal ◽

Freundlich Isotherm ◽

Recovery Process ◽

Primary Objective ◽

Ion Concentration ◽

Isotherm Models

The primary objective of the present study is to evaluate the optimization conditions such as kinetic and equilibrium isotherm models involved in the removal of Ni(II) from the aqueous solutions byTrichoderma viride. The biosorbent was characterized by FTIR and SEM. The optimum biosorption conditions were determined as a function of pH, biomass dosage, contact time, initial metal ion concentration, and temperature. The maximum Ni(II) biosorption was obtained at pH 4.5. The equilibrium data were better fit by the Langmuir isotherm model than by the Freundlich isotherm. The kinetic studies indicate that the biosorption process of the metal ion Ni(II) has followed well the pseudo-second-order model. The sum of the square errors (SSE) and chi-square (χ2) tests were also carried out to find the best fit kinetic model and adsorption isotherm. The maximum biosorption capacity (qm) ofT.viridebiomass was found to be 47.6 mg/g for Ni(II) ion. Therefore, it can be concluded thatT.viridebiomass was effective and low-cost potential adsorbent to remove the toxic metal Ni(II) from aqueous solutions. The recovery process of Ni(II) fromT.viridebiomass was found to be higher than 98% by using 0.25 M HNO3. Besides the application of removal of toxic metal Ni(II) from aqueous solutions, the biosorbentT.viridecan be reused for five consecutive sorption-desorption cycles was determined.

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Hen feather a bio-waste material for adsorptive removal of methyl red dye from aqueous solutions

H2Open Journal ◽

10.2166/h2oj.2021.123 ◽

2021 ◽

Author(s):

Samina Zaman ◽

Md. Nayeem Mehrab ◽

Md. Shahnul Islam ◽

Gopal Chandra Ghosh ◽

Tapos Kumar Chakraborty

Keyword(s):

Aqueous Solutions ◽

Contact Time ◽

Low Cost ◽

Freundlich Isotherm ◽

Methyl Red ◽

Experimental Conditions ◽

Potential Applicability ◽

Pseudo Second Order ◽

Red Dye ◽

Adsorbent Dose

Abstract This study investigates the potential applicability of hen feather (HF) to remove methyl red (MR) dye from aqueous solution with the variation of experimental conditions: contact time (1–180 min), pH (4–8), initial dye concentration (5–50 mg/L) and adsorbent dose (3–25 g/L). Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) evaluate the surface morphology and chemistry of HF, respectively. The maximum removal of MR by HF was 92% when the optimum conditions were initial MR dye concentration 05 mg/L, pH 4.0, adsorbent dose 07.0 g/L and 90.0 min equilibrium contact time. Langmuir isotherm (R2 = 0.98) was more suited than Freundlich isotherm (R2 = 0.96) for experimental data, and the highest monolayer adsorption capacity was 6.02 mg/g. The kinetics adsorption data fitted well to pseudo-second-order model (R2 = 0.999) and more than one process were involved during the adsorption mechanism but film diffusion was the potential rate-controlling step. The findings of the study show that HF is a very effective and low-cost adsorbent for removing MR dye from aqueous solutions.

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REMOVAL OF LEAD (Pb ) AND ZINC (Zn ) FROM AQUEOUS SOLUTIONS BY ADSORPTION ON VERMICULITE FROM ASKOS AREA IN MACEDONIA (NORTHERN GREECE).

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.16617 ◽

2018 ◽

Vol 36 (1) ◽

pp. 182

Author(s):

A. Bourliva ◽

K. Michailidis ◽

C. Sikalidis ◽

G. Trontsios

Keyword(s):

Heavy Metal ◽

Aqueous Solutions ◽

Low Cost ◽

High Capacity ◽

Freundlich Isotherm ◽

Batch Adsorption ◽

Northern Greece ◽

Batch Type ◽

Zinc Removal ◽

Lead And Zinc

The lead and zinc removal from their aqueous solutions by vermiculite samples from Askos area, Northern Greece, was studied using a batch type method. Askos vermiculite is mainly consisted of mixed-layer phyllosilicates. A standard vermiculite sample from Kent, Connecticut was also used for comparison reasons. The concentration of the solutions used varied between 100 and 2000mg/L The maximum uptake capacity of the Askos vermiculite for lead and zinc was found to reach 95% and 96% from solutions containing 100mg/L, respectively. Much lower uptake capacities: 37% for lead and 76% for zinc were found for the Kent vermiculite. The experimental results showed that the Askos vermiculite exhibited an acceptable high capacity for removing metal ions from aqueous solutions. Thus, this untreated and low-cost mineral can find use in purifying heavy metal wastewaters. The uptake distribution coefficient (Kd) showed that the relative lead and zinc removal is higher for initial concentrations below 1000mg/L Batch adsorption experiments conducted at room temperature (22±1°C) showed that the adsorption patterns followed the Freundlich isotherm model. The heavy metal (Pb2+, Zn2+) removal is a rather complicated phenomenon related both to the aqueous chemistry of the elements and the interaction of their cationic species with the used materials. The removal procedure can be attributed to different processes such as ion exchange, adsorption, and precipitation.

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Adsorption of Methylene Blue from aqueous solution using Senegal River Typha australis

Mediterranean Journal of Chemistry ◽

10.13171/mjc10102001221185adn ◽

2020 ◽

Vol 10 (1) ◽

pp. 22-32

Author(s):

Abdoulaye Demba N'diaye ◽

Youcef Aoulad El Hadj Ali ◽

Mohamed Abdallahi Bollahi ◽

Mostafa Stitou ◽

Mohamed Kankou ◽

...

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Low Cost ◽

Activation Parameters ◽

Freundlich Isotherm ◽

Isotherm Models ◽

Batch Adsorption ◽

Senegal River ◽

Typha Australis ◽

Equilibrium Data

In this work, batch adsorption experiments were carried out for the removal of Methylene Blue (MB) from aqueous solutions using Typha australis leaf as a low cost adsorbent. The effects of some variables governing the efficiency of the process such as adsorbent mass, pH, ionic strength, contact time and temperature were investigated. The adsorption kinetic data were analyzed using the Pseudo First Order (PFO) and Pseudo Second Order (PSO) models. The experimental equilibrium data were analyzed using Langmuir and Freundlich isotherm models. The results show that the PSO model is the best for describing the adsorption of MB by Typha australis for all initial MB concentrations. The equilibrium data fitted well with the Langmuir model with the monolayer adsorption capacity for MB-Typha australis leaf system was of 103.12 mg g-1. The values of activation parameters such as free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) were also determined as - 4.44 kJ mol−1, 55.13 kJ mol−1 and 203.21 J mol−1 K−1, respectively. The thermodynamics parameters of MB-Typha australis system indicate spontaneous and endothermic process. These results indicate that the Typha australis leaf can be feasibly employed for the eradication of MB from aqueous solution.

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Adsorption of cefixime from aqueous solutions using modified hardened paste of Portland cement by perlite; optimization by Taguchi method

Water Science & Technology ◽

10.2166/wst.2016.230 ◽

2016 ◽

Vol 74 (5) ◽

pp. 1069-1078 ◽

Cited By ~ 8

Author(s):

Mohammad Hossein Rasoulifard ◽

Soghra Khanmohammadi ◽

Azam Heidari

Keyword(s):

Portland Cement ◽

Aqueous Solutions ◽

High Efficiency ◽

Low Cost ◽

Cost Effective ◽

Isotherm Models ◽

Batch Adsorption ◽

Affecting Factors ◽

Effective Removal ◽

Removal Technique

In the present study, we have used a simple and cost-effective removal technique by a commercially available Fe-Al-SiO2 containing complex material (hardened paste of Portland cement (HPPC)). The adsorbing performance of HPPC and modified HPPC with perlite for removal of cefixime from aqueous solutions was investigated comparatively by using batch adsorption studies. HPPC has been selected because of the main advantages such as high efficiency, simple separation of sludge, low-cost and abundant availability. A Taguchi orthogonal array experimental design with an OA16 (45) matrix was employed to optimize the affecting factors of adsorbate concentration, adsorbent dosage, type of adsorbent, contact time and pH. On the basis of equilibrium adsorption data, Langmuir, Freundlich and Temkin adsorption isotherm models were also confirmed. The results showed that HPPC and modified HPPC were both efficient adsorbents for cefixime removal.

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Kinetics and adsorption studies of lead (II) onto activated carbon using low cost adsorbents

Global NEST Journal ◽

10.30955/gnj.002532 ◽

2018 ◽

Vol 20 (2) ◽

pp. 381-388 ◽

Cited By ~ 1

Keyword(s):

Low Cost ◽

Freundlich Isotherm ◽

Isotherm Models ◽

Batch Adsorption ◽

Order Kinetic ◽

Rate Limiting Step ◽

Bambusa Vulgaris ◽

Order Kinetic Model ◽

Pseudo Second Order ◽

Fagopyrum Esculentum Moench

The removal of Lead (II) from aqueous solutions using Fagopyrum esculentum Moench (Buckwheat) and Bambusa vulgaris (common bamboo) as adsorbents was investigated. The effects of various experimental parameters such as initial concentration, contact time and pH have been studied using batch adsorption technique. All the Adsorption isotherm models fitted well with the adsorption data. However, Freundlich isotherm displayed a better fitting model than the other two isotherm models due to high correlation coefficient (R2). This indicates the applicability of multilayer coverage of the Pb (II) on the surface of adsorbent. The adsorption kinetics was studied using four simplified models and it was found to follow the pseudo-second-order kinetic model which confirmed the applicability of the model. The adsorption mechanism was found to be chemisorption and the rate-limiting step was mainly surface adsorption.

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ADSORPTION STUDIES ON THE REMOVAL OF NAPHTOL-AS DYE USING IRON FILINGS AS ADSORBENT

Journal of Chemical Society of Nigeria ◽

10.46602/jcsn.v46i2.604 ◽

2021 ◽

Vol 46 (2) ◽

Author(s):

C. M. Ngwu ◽

O. K. Amadi ◽

M. O. Mac-Kalunta ◽

J. Onyeuwaoma

Keyword(s):

Experimental Data ◽

Low Cost ◽

Freundlich Isotherm ◽

Kinetic Studies ◽

Second Order ◽

Isotherm Models ◽

Batch Adsorption ◽

Adsorption Processes ◽

Pseudo Second Order ◽

Controlled Adsorption

This study investigated the potential of iron filings as low cost and environmentally friendly adsorbent for removing Naphthol AS dye from aqueous solutions. The batch-adsorption experiments were performed as a function of pH, temperature, concentration, contact time as well as dynamics of the process. The Langmuir, Freundlich and Dubinin-Raduskevich isotherm models for the adsorption processes were tested but Freundlich isotherm provided the best description for adsorption of the dye solution onto the iron filings, suggesting a physisorption controlled adsorption. The adsorption process was highly pH-dependent and the result indicates that the optimum pH for adsorption of Naphthol AS onto the adsorbent occurred at 4.0 having a maximum removal efficiency of 88 % respectively. Pseudo first-order and second-order as well as the intra-particle diffusivity kinetic models were applied to the experimental data and results showed that the pseudo second-order provided best fit for the experimental data. Kinetic studies also showed that the adsorption transport mechanism was particle-diffusion controlled.

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Removal of the Hypoglycaemic Drug Gliclazide From Aqueous Solutions by Carbon-Based Magnetic Materials

10.21203/rs.3.rs-856409/v1 ◽

2021 ◽

Author(s):

Ferda Civan Çavuşoğlu

Keyword(s):

Aqueous Solutions ◽

Adsorption Capacity ◽

Correlation Coefficients ◽

Freundlich Isotherm ◽

Isotherm Models ◽

Batch Adsorption ◽

Solution Ph ◽

Monolayer Adsorption ◽

Langmuir Isotherm Model ◽

Carbon Based

Abstract Adsorption of gliclazide from aqueous solutions with carbon-based adsorbents is the aim of this study. For this purpose, magnetic, versatile, and inexpensive magnetic activated carbon (MAC) and magnetic multi-walled carbon nanotube (MMWCNT) adsorbents have been developed. MAC and MMWCNT characterization were analyzed using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Thermogravimetric analysis (TGA) techniques. In order to find the optimum conditions in batch adsorption experiments, the effects of parameters such as adsorbent dose, gliclazide solution pH, contact time, temperature and presence of foreign ions were investigated. Parameters were calculated for adsorption isotherms using Langmuir and Freundlich models. The adsorption studies of MAC and MMWCNT materials with gliclazide were in accordance with the nonlinear Langmuir and Freundlich isotherm models for all temperatures (298, 308, 318 K). The correlation coefficients of the Langmuir isotherm model are slightly higher than the Freundlich model. MAC adsorbent has maximum monolayer adsorption capacity at T=298 K (qmax=101.66 mg/g, R2=0.88) while MMWCNT has maximum monolayer adsorption capacity at T=308 K (qmax=71.59 mg/g, R2=0.90). For MAC and MMWCNT - Gliclazide adsorption systems, pseudo-first and secondorder kinetic models were examined and found to be more appropriate to the pseudo-secondorder kinetic model. The results showed that the MAC and MMWCNT could be could be promising adsorbents for gliclazide removal.

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Adsorption of penicillin by decaffeinated tea waste

Polish Journal of Chemical Technology ◽

10.1515/pjct-2015-0056 ◽

2015 ◽

Vol 17 (3) ◽

pp. 95-99 ◽

Cited By ~ 4

Author(s):

Parvin Gharbani ◽

Ali Mehrizad ◽

Ismail Jafarpour

Keyword(s):

High Performance ◽

Low Cost ◽

Freundlich Isotherm ◽

Isotherm Models ◽

Batch Adsorption ◽

Order Kinetic ◽

Solution Ph ◽

First Order ◽

Tea Waste ◽

Main Factor

Abstract Removal of penicillin has been investigated using decaffeinated tea waste (DCTW). Decaffeination of tea waste was investigated using different methods. Results indicate that ozonation was the most effective process for removal of penicillin. Batch adsorption experiments were completed at various temperatures (20, 30, and 40°C), DCTW dosages (2, 4, 6, 8, and 10 g per 250 mL), penicillin concentrations (4, 10, and 14 mg/L), and pH (3, 7, and 10) conditions. Studies showed that adsorption reaches equilibrium within 40 min. The main factor affecting adsorption of penicillin was the solution pH, with maximum adsorption occurring at pH 3. Higher adsorbent dosages and lower penicillin concentrations also resulted in higher percentages of penicillin removal. Results show that data obeyed the pseudo-first-order kinetic and Freundlich isotherm models. This process proves that low-cost DCTW could be used as a high performance adsorbent for removing penicillin from aqueous solutions.

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Bentonite Modified by Allylamine Polymer for Adsorption of Amido Black 10B

Polymers ◽

10.3390/polym11030502 ◽

2019 ◽

Vol 11 (3) ◽

pp. 502 ◽

Cited By ~ 7

Author(s):

Wenjuan Guo ◽

Tingcheng Xia ◽

Meishan Pei ◽

Yankai Du ◽

Luyan Wang

Keyword(s):

Dye Removal ◽

Low Cost ◽

Freundlich Isotherm ◽

Isotherm Models ◽

Batch Adsorption ◽

X Ray Diffraction ◽

X Ray ◽

Amido Black 10B ◽

Amido Black ◽

New Type

The main object of this work is to remove Amido black 10B using a new type of bentonite-based adsorbent with cationic groups by the modification of polyallyl amines between the interlayers of bentonite. Fourier transform infrared, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy were used to characterize the functionalized bentonite. A series of batch adsorption experiments were performed. The maximum adsorption amount was 144.08 mg g−1 when the pH was 2 and the contact time was 120 min. In addition, the equilibrium isotherm data were analyzed using Langmuir and Freundlich isotherm models, while only the Langmuir model could provide a high correlation. Therefore, this study provided a new functionalized bentonite as a low-cost adsorbent for dye removal from water.

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