scholarly journals Effect of Mangrove Biochar Residue Amended Shrimp Pond Sediment on Nitrogen Adsorption and Leaching

2021 ◽  
Vol 13 (13) ◽  
pp. 7230
Author(s):  
Sokkeang Be ◽  
Soydoa Vinitnantharat ◽  
Anawat Pinisakul
Keyword(s):  
Contact Time ◽  
Nitrogen Loss ◽  
Nitrogen Adsorption ◽  
Nitrogen Leaching ◽  
Water Volume ◽  
Isotherm Models ◽  
Freundlich Model ◽  
Shrimp Pond ◽  
Adsorption Isotherm Models ◽  
Leaching Experiments

Mangrove biochar residue was used for nitrogen adsorption and retention in sediment, which is beneficial for plant germination. The present study investigated the effect of contact time (5–360 min), biochar dosage (0.2–2 g L−1), pH (5–6), and initial concentration (2–10 mg L−1) on NH4+-N and NO3−-N adsorption. Three different adsorption isotherm models were used to fit the experimental data. Column leaching experiments were conducted to investigate the effect of biochar with sediment from a shrimp pond on nitrogen leaching at varying biochar dosages (0–8% w/w). The results showed that the maximum percentage of both NH4+-N and NO3−-N adsorption was achieved at an equilibrium contact time of 240 min, with an adsorbent dosage of 2 g L−1, and pH at 5.5 and 5, respectively. The adsorption of NH4+-N and NO3−-N were fitted to the Freundlich model and the adsorption process followed the physisorption and ion exchange. The addition of 8% biochar reduced both cumulative water volume and nitrogen leaching from the sediment. The biochar amendment increased the relative abundance of nitrifying and denitrifying bacteria in the sediment. This result suggested that biochar amended with sediment could be useful for nitrogen loss reduction.

Biosorption of Ni (II) from Aqueous Solution by Aspergillus niger

2014 ◽  
Vol 556-562 ◽  
pp. 282-285
Author(s):  
Li Fang Zhang ◽  
Zhao Shao ◽  
Chun Yang Jiang
Keyword(s):  
Contact Time ◽  
Metal Uptake ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Freundlich Model ◽  
Optimum Ph ◽  
Initial Ph ◽  
Equilibrium Data ◽  
Increasing Temperature ◽  
Biosorption Equilibrium

In this study, Biosorption of Ni (II) ions from aqueous solution by using biomass ofAspergillusnigerwas investigated. Different parameters such as initial pH, Ni (II) ions concentration, contact time and temperature were explored. The biosorption of Ni (II) ions was highly pH dependent and the optimum pH for biosorption of Ni (II) ions was found to be 7.0. The biosorption equilibrium was established in about 30min of contact time. Ni (II) ions removal increased with increasing temperature in the studied range. Equilibrium uptake of Ni (II) ions onto biomass increased with increasing initial Ni (II) ions concentration (20-300mg/L). The Langmuir and Freundlich isotherm models were applied to experimental equilibrium data and the Langmuir model better described the equilibrium metal uptake than the Freundlich model. These results suggest that the biomass ofAspergillusnigeris a promising biosorbent for removal of nickel (II) ions from the wastewater.

scholarly journals Chemical and physical preparation of activated carbon using Raw bagasse for cationic dye adsorption

2016 ◽  
Vol 18 (2) ◽  
pp. 402-415 ◽  
Keyword(s):  
Activated Carbon ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Dye Adsorption ◽  
Isotherm Models ◽  
Adsorptive Capacity ◽  
Adsorption Isotherm Models ◽  
Equilibrium Data ◽  
Agriculture Wastes ◽  
Physical Preparation

<div> <p>Agriculture wastes like sugarcane bagasse are available in large quantities in Egypt. Various adsorbents from natural materials, industrial waste materials, agricultural by-products, and biomass based activated carbon can be used in the removal of various dyes. Raw Bagasse pith (RBP) was used to prepare activated carbon (AC) using phosphoric acid (H<sub>3</sub>PO<sub>4</sub>) as a chemical activating agent. C The raw BP and the synthesized adsorbent were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope (SEM). The effectiveness of AC prepared in adsorption of methylene blue (MB) has been studied as a function of adsorbent type, initial dye concentration and contact time. The effects of the initial dye concentration and contact time were evaluated. Adsorption isotherm models - Langmuir, Freundlich and Temkin were used to simulate the equilibrium data. Langmuir equation was found to have the highest value of R<sup>2</sup> compared with other models. Furthermore, it was found that sugarcane bagasse have a high adsorptive capacity towards MB.</p> </div> <p>&nbsp;</p>

scholarly journals Cr(VI) adsorption from aqueous streams on eggshell membranes of different birds used as biosorbents

2020 ◽  
Vol 38 (9-10) ◽  
pp. 413-434
Author(s):  
Jessica Badillo-Camacho ◽  
Eulogio Orozco-Guareño ◽  
Gregorio G Carbajal-Arizaga ◽  
Ricardo Manríquez-Gonzalez ◽  
Icela D Barcelo-Quintal ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Isotherm Models ◽  
Order Kinetic ◽  
Freundlich Model ◽  
Membrane Surfaces ◽  
Adsorption Isotherm Models ◽  
Before And After ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Efficient Option

The discharges enriched with heavy metals, particularly Cr(VI), are a serious environmental problem. In this work, it is presented the use of biosorbents from eggshells membranes of ostrich, quail, duck and chicken; the membranes were easily prepared and studied for the removal of Cr(VI) from aqueous solutions. Maximum uptake of 1.41 mmol g−1 membrane permitted the identification of ostrich membrane as the material with the highest Cr(VI) uptake. N2 adsorption experiments permitted to classify ostrich membranes as mesoporous materials, since they had pore size of 14.8 nm. This represented an advantage on the nature of these membranes to be used as biosorbents with respect to other membranes. The adsorption isotherm models such as Langmuir and Freundlich were verified using experimental data. Langmuir model described the adsorption process satisfactorily at pH 1 and 2 whereas Freundlich model fitted data better at pH 3 and 5. The adsorption kinetic data were adjusted to a pseudo-second order kinetic model. TGA results permitted demonstrating a low thermal stability of ostrich membrane, since it starts decomposing at around 50°C due to the fact that membranes have about 60% protein. Through SEM microscopy was possible to observe the morphology of the membrane surfaces before and after Cr(VI) uptake which reflects the textural characteristics of the biosorbent. FTIR and XPS analyses suggested that Cr was adsorbed on ostrich membranes through the amine groups of proteins conforming the fibers of membranes. Despite the oxygen shows higher electronegativity than N, Cr shows more preference toward N due to fact that pH conditions favor the positive charges on the surface of the membrane. Our results make evident that this waste material is a novel and efficient option for the removal of Cr(VI) from aqueous solutions.

scholarly journals The Use of Tea leaves Wastes to reduce Hexavalent Chromium Concentration in industrial Waste Water by Adsorption

2014 ◽  
Vol 11 (2) ◽  
pp. 1067-1073
Author(s):  
Baghdad Science Journal
Keyword(s):  
Waste Water ◽  
Hexavalent Chromium ◽  
Chromium Concentration ◽  
Experimental Results ◽  
Isotherm Models ◽  
Freundlich Model ◽  
Adsorption Isotherm Models ◽  
Freundlich Adsorption Isotherm ◽  
Stirring Time ◽  
Carcinogenic Compound

Abstract : A research was conducted to study the process parameters affecting hexavalent chromium Cr (VI) (carcinogenic compound) the removal percentage from the electrical industries company waste water that contain 88 mg/l of Cr (VI) concentration by adsorption onto tea wastes. Synthetic water with 88 mg/l Cr (VI) concentration was used. Several operation parameters affecting Cr (VI) removal efficiency were investigated, such as pH, initial Cr (VI) concentration, stirring time and tea wastes dose. The experimental results reveal that maximum Cr (VI) removal reached up to 94.26% at pH of 2, stirring time of 180 minute, tea wastes dose of 8gm/100 ml and the equilibrium was attained at 180 minute. Langmuir and Freundlich adsorption isotherm models were analyzed and the experimental results fit very well with Freundlich model.

scholarly journals Error analysis of adsorption isotherm models for penicillin G onto magnesium oxide nanoparticles

2019 ◽  
Vol 9 (8) ◽  
Author(s):  
Somayeh Rahdar ◽  
Abbas Rahdar ◽  
Mina Khodadadi ◽  
Shahin Ahmadi
Keyword(s):  
Aqueous Solution ◽  
Adsorption Isotherm ◽  
Magnesium Oxide ◽  
Contact Time ◽  
Penicillin G ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Mgo Nanoparticles ◽  
Magnesium Oxide Nanoparticles ◽  
Adsorption Isotherm Models

Abstract The adsorption of penicillin G (PC-G) from aqueous solution by magnesium oxide (MgO) nanoparticles has been investigated. This experimental study was conducted in a laboratory scale. The effects of various operating parameters such as pH (3–11), the dosage of MgO nanoparticles (0.3–1.5 g/L), contact time (20–150 min), and concentration of PC-G (50–200 mg/L) were studied. The results showed that under optimal conditions of concentration of 50 mg/L, pH 3, MgO nanoparticles dosage of 1.5 g/L and contact time of 60 min, the maximum adsorption capacity (qm) of PC-G adsorption on MgO nanoparticles obtained was 25.66 mg/g. The process of penicillin G adsorption on MgO nanoparticles was found to depend on Langmuir (II) and Langmuir (III) adsorption isotherm models. It could be concluded that the MgO nanoparticles can be used for PC-G removal from its aqueous solution.

scholarly journals The Olive Core, a Promoter Material for the Adsorption of Dyes: Effects on Certain Parameters, Kinetic and Thermodynamic Study

2018 ◽  
Vol 34 (6) ◽  
pp. 2859-2866
Author(s):  
Ahde El-Imache ◽  
Kamar Ouazzani
Keyword(s):  
Contact Time ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Isotherm Models ◽  
Synthetic Dyes ◽  
Freundlich Model ◽  
Initial Concentration ◽  
Natural Support ◽  
Kinetic And Thermodynamic Study ◽  
Adsorbent Characterization

In this study, the Moroccan Olive Core (OC) was chosen for the preparation of a bio-adsorbent for the purpose of using it as a natural support to remove two synthetic dyes: Methyl Blue (MB) and Crystal Violet (CV) from aqueous solutions. Tow adsorbent characterization techniques were used: Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Influence of some parameters is studied to characterize the adsorption process: contact time (0-45 min), temperature (25 -100 °C) and initial concentration of MB and CV (10-30 mg.l-1). Langmuir, Freundlich and Dubinin-Radushkevich isotherm models were used to describe the adsorption equilibrium. The equilibrium is perfectly described by the Freundlich model whose correlation coefficient is equal to 0.995 for MB and 0.991 for CV. Thermodynamic parameters were valued, and they showed that, for both dyes, the adsorption on MOC is endothermic and spontaneous.

scholarly journals Application ofGlycyrrhiza glabraRoot as a Novel Adsorbent in the Removal of Toluene Vapors: Equilibrium, Kinetic, and Thermodynamic Study

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Fazel Mohammadi-Moghadam ◽  
Mohammad Mehdi Amin ◽  
Mehdi Khiadani (Hajian) ◽  
Fariborz Momenbeik ◽  
Heshmatollah Nourmoradi ◽  
...  
Keyword(s):  
Contact Time ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Freundlich Model ◽  
Adsorbate Concentration ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Kinetic And Thermodynamic Study ◽  
Better Than

The aim of this paper is to investigate the removal of toluene from gaseous solution throughGlycyrrhiza glabraroot (GGR) as a waste material. The batch adsorption experiments were conducted at various conditions including contact time, adsorbate concentration, humidity, and temperature. The adsorption capacity was increased by raising the sorbent humidity up to 50 percent. The adsorption of toluene was also increased over contact time by 12 h when the sorbent was saturated. The pseudo-second-order kinetic model and Freundlich model fitted the adsorption data better than other kinetic and isotherm models, respectively. The Dubinin-Radushkevich (D-R) isotherm also showed that the sorption by GGR was physical in nature. The results of the thermodynamic analysis illustrated that the adsorption process is exothermic. GGR as a novel adsorbent has not previously been used for the adsorption of pollutants.

scholarly journals Error Analysis of Adsorption Isotherm Models for Sulfamethazine onto Multi Walled Carbon Nanotubes

2019 ◽  
pp. 1-10
Author(s):  
Davoud Balarak ◽  
Amir Ali Salari
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Error Analysis ◽  
Contact Time ◽  
Isotherm Models ◽  
Transmission Electron ◽  
Adsorption Isotherm Models ◽  
Equilibrium Data ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In the present study, Multi walled carbon nanotubes (MWCNTs) was used for the adsorption of Sulfamethazine (SMZ) antibiotics. The adsorbent was characterized by scanning electron microscopy, surface area (BET) and transmission electron microscopy. Batch experiments were carried out by varying the parameters like contact time, adsorbent dosage and initial Sulfamethazine concentration at fixed pH and temperature. The equilibrium data were tested with Langmuir, Freundlich, Tempkin, Dubinin–Radushkevich (D–R), Redlich-Peterson (R-P), Sips, Toth and Khan isotherm models at five Error Analysis EABS, X2, ARE, RMSE and SD and it was found that the Langmuir and Toth isotherms best fitted the adsorption of SMZ with highest value of R2 and lowest overall experimental error. Also according to the results, a maximum removal efficiency of 99.1% was obtained at pH of 7 and the contact time of 60 min; initial SMZ concentration 20 mg/L and adsorbent dose 0.8 g/L.

Removal of Mn(II) and Fe(II) by Aspergillus Sp. TU-GM14 immobilized on Detarium Microcarpum matrix

2014 ◽  
Vol 16 (4) ◽  
pp. 597-608 ◽  
Keyword(s):  
Sorption Process ◽  
Isotherm Models ◽  
Freundlich Model ◽  
Equilibrium Time ◽  
Bead Size ◽  
Detarium Microcarpum ◽  
Bet Isotherm ◽  
Immobilization Matrix ◽  
Aspergillus Sp ◽  
Spore Load

<div> <p>Removal of Fe(II) and Mn(II) ions from aqueous solution by fungal biosorbent <em>Aspergillus sp. TU-GM14</em>immobilized on <em>Detarium microcarpum</em> matrix was investigated in this study. Effects of biosorption parameters pH, biosorbent concentration, bead size and equilibrium time on Fe(II) and Mn(II) ions sorption were also determined. Equilibrium was attained within in 3 hours while optimum Fe(II) and Mn(II) ions removal was observed at pH 6, 8 mm bead size, 2 g l<sup>-1</sup> spore load respectively. Adsorption capacity was described using Langmuir, Freundlich and BET isotherm models. The experimental data fitted best to the Freundlich model (<em>R</em><sup>2</sup> 0.992 and 0.996 for Mn(II) and Fe(II) respectively). Favourable surface sorption process was described by Langmuir isotherm for both metals (<em>Q</em><sub>max </sub>34 and 14 mg g<sup>-1</sup> for Mn(II) and Fe(II) ions) while the BET isotherm constant, <em>B</em>, described high metals sorption beyond the biosorbent surface in a multi-layer sorption process (4.8 and 9.0 for Mn(II) and Fe(II)&nbsp; respectively). Results of the study showed that <em>Aspergillus sp. TU-GM14 </em>biosorbent can remove large quantities of Fe(II) and Mn(II) ions from solution in both surface and multi-layer sorption process with <em>Detarium microcarpum</em> acting as a cheap immobilization matrix.</p> </div> <p>&nbsp;</p>

scholarly journals Adsorption Characteristics of Phosphate Ions by Pristine, CaCl2 and FeCl3-Activated Biochars Originated from Tangerine Peels

Separations ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 32 ◽  
Author(s):  
Changgil Son ◽  
Wonyeol An ◽  
Geonhee Lee ◽  
Inho Jeong ◽  
Yong-Gu Lee ◽  
...  
Keyword(s):  
Adsorption Kinetics ◽  
Chemical Activation ◽  
Isotherm Models ◽  
Order Model ◽  
Phosphate Ions ◽  
Adsorption Capacities ◽  
Adsorption Isotherm Models ◽  
Endothermic Reactions ◽  
Pseudo Second Order ◽  
Adsorption Kinetics And Isotherm

This study has evaluated the removal efficiencies of phosphate ions (PO43−) using pristine (TB) and chemical-activated tangerine peel biochars. The adsorption kinetics and isotherm presented that the enhanced physicochemical properties of TB surface through the chemical activation with CaCl2 (CTB) and FeCl3 (FTB) were helpful in the adsorption capacities of PO43− (equilibrium adsorption capacity: FTB (1.655 mg g−1) > CTB (0.354 mg g−1) > TB (0.104 mg g−1)). The adsorption kinetics results revealed that PO43− removal by TB, CTB, and FTB was well fitted with the pseudo-second-order model (R2 = 0.999) than the pseudo-first-order model (R2 ≥ 0.929). The adsorption isotherm models showed that the Freundlich equation was suitable for PO43− removal by TB (R2 = 0.975) and CTB (R2 = 0.955). In contrast, the Langmuir equation was proper for PO43− removal by FTB (R2 = 0.987). The PO43− removal efficiency of CTB and FTB decreased with the ionic strength increased due to the compression of the electrical double layer on the CTB and FTB surfaces. Besides, the PO43− adsorptions by TB, CTB, and FTB were spontaneous endothermic reactions. These findings demonstrated FTB was the most promising method for removing PO43− in waters.

Sign in / Sign up

Export Citation Format

Share Document