Effect of inorganic salt ions on the adsorption of quinoline using coal powder

2018 ◽  
Vol 78 (3) ◽  
pp. 496-505 ◽  
Author(s):  
Yue Bian ◽  
Hao Sun ◽  
Yunxiao Luo ◽  
Qieyuan Gao ◽  
Guosheng Li ◽  
...  
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Inorganic Salt ◽  
Removal Rate ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Isothermal Adsorption ◽  
Adsorbed Amount ◽  
Salt Ions ◽  
Coal Powder

Abstract In this study, coal powder was used as the adsorbent for quinoline. The effect of inorganic salt ions on the adsorption was explored, and the results suggest that the addition of inorganic salt ions can enhance both the removal rate and the amount of quinoline adsorbed. The removal rate and adsorbed amount of quinoline were 83.87% and 1.26 mg/g without inorganic salt ions. Under the same adsorption conditions, the removal rate and adsorbed amount of quinoline could reach 90.21% and 1.35 mg/g when Na+ was present in the solution, and 94.47% and 1.42 mg/g with the presence of Ca2+. In addition, the adsorption of quinoline using coal fitted the Freundlich isothermal adsorption model. Changes in the Gibbs free energy, entropy and heat of adsorption were all negative, indicating that the adsorption was spontaneous and exothermic. The changes in the absolute value of Gibbs free energy under both Na+ and Ca2+ were higher than that in the blank(without inorganic salt ions). The pseudo-second-order kinetic model was found to fit the adsorption kinetic data well, and the activation energy of adsorption under Na+ and Ca2+ were lower than that in the blank. These indicate that the addition of inorganic salt ions was beneficial to the adsorption process.

Study on the Adsorption of Livestock Wastewater by Bentonite Coated Chitosan

2011 ◽  
Vol 356-360 ◽  
pp. 368-372
Author(s):  
Hong Shao ◽  
Di Zhang
Keyword(s):  
Removal Rate ◽  
Orthogonal Experiment ◽  
Ammonia Nitrogen ◽  
Raw Material ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Livestock Wastewater ◽  
Isothermal Adsorption ◽  
Preparation Conditions ◽  
Pseudo Second Order

The bentonite coated chitosan which was prepared of natural bentonite used as raw material and chitosan used as modifying agent applied in the treatment of livestock wastewater. The optimal preparation conditions were obtained and the removal rate of the ammonia nitrogen and COD were 73.09% and 88.94% respectively which raw concentration were 27520mg/L and 2060mg/L by orthogonal experiment. Langmuir isothermal adsorption model and the pseudo-second-order kinetic equation could describe the adsorption process accurately.

scholarly journals Kinetics and thermodynamic properties related to the drying of 'Cabacinha' pepper fruits

2016 ◽  
Vol 20 (2) ◽  
pp. 174-180 ◽  
Author(s):  
Hellismar W. da Silva ◽  
Renato S. Rodovalho ◽  
Marya F. Velasco ◽  
Camila F. Silva ◽  
Luís S. R. Vale
Keyword(s):  
Experimental Data ◽  
Activation Energy ◽  
Free Energy ◽  
Thermodynamic Properties ◽  
Gibbs Free Energy ◽  
Removal Rate ◽  
Effective Diffusion ◽  
Drying Time ◽  
Three Samples ◽  
Different Temperatures

ABSTRACT The objective of this study was to determine and model the drying kinetics of 'Cabacinha' pepper fruits at different temperatures of the drying air, as well as obtain the thermodynamic properties involved in the drying process of the product. Drying was carried out under controlled conductions of temperature (60, 70, 80, 90 and 100 °C) using three samples of 130 g of fruit, which were weighed periodically until constant mass. The experimental data were adjusted to different mathematical models often used in the representation of fruit drying. Effective diffusion coefficients, calculated from the mathematical model of liquid diffusion, were used to obtain activation energy, enthalpy, entropy and Gibbs free energy. The Midilli model showed the best fit to the experimental data of drying of 'Cabacinha' pepper fruits. The increase in drying temperature promoted an increase in water removal rate, effective diffusion coefficient and Gibbs free energy, besides a reduction in fruit drying time and in the values of entropy and enthalpy. The activation energy for the drying of pepper fruits was 36.09 kJ mol-1.

Adsorption of Ni(II) by a thermo-sensitive colloid: methylcellulose/calcium alginate beads

2019 ◽  
Vol 68 (7) ◽  
pp. 495-508
Author(s):  
Zhongmin Li ◽  
Wanwan Wu ◽  
Wenyan Jiang ◽  
Guangtao Wei ◽  
Yunshang Li ◽  
...  
Keyword(s):  
Calcium Alginate ◽  
Adsorption Process ◽  
Alginate Beads ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Isothermal Adsorption ◽  
Calcium Alginate Beads ◽  
Lower Temperature ◽  
Kinetics And Isotherms

Abstract The adsorption of Ni(II) by a thermo-sensitive adsorbent of methylcellulose/calcium alginate beads (CAMCBs) was studied using batch adsorption tests to determine the adsorption process and properties, the effects of adsorbent dosage, initial concentration, adsorption time and temperature. The adsorption process was further investigated using kinetics, isotherms and thermodynamic methods. The kinetics and isotherms studies showed the adsorption of Ni(II) on CAMCBs was fitted by the pseudo-second-order kinetic model and Langmuir isothermal adsorption model, respectively. The thermodynamic parameters indicated that the adsorption process was spontaneous and exothermic at lower temperature, and the entropy of the adsorption process was negative. In the study of regeneration, it was confirmed that under the temperature of 60 °C, the desorption agent of CaCl2 with concentration of 3 g·L−1 was more conducive to the desorption of Ni(II) from CAMCBs. Both adsorption capacity and mechanical strength of the used CAMCBs could be basically recovered to the level of fresh CAMCBs after desorption. The prepared CAMCBs had a good property of adsorption of Ni(II) and an excellent regeneration performance.

scholarly journals Removal of Uranyl Ion from Wastewater by Magnetic Adsorption Material of Polyaniline Combined with CuFe2O4

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Xinrui Feng ◽  
Shaoshuai Sun ◽  
Ge Cheng ◽  
Lei Shi ◽  
Xiangshan Yang ◽  
...  
Keyword(s):  
Adsorption Process ◽  
Regeneration Ability ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Uranyl Ions ◽  
Adsorption Model ◽  
Isothermal Adsorption ◽  
High Maximum ◽  
Magnetic Adsorption ◽  
Order Kinetic Equation

The magnetic adsorption material of polyaniline (PANI) with amino functional group combined with CuFe2O4 (CuFe2O4/PANI nanocomposite) has been described in this work. It has been characterized by TEM, XRD, XPS, BET, FTIR, and VSM, respectively. Significantly, it exhibits extremely high maximum adsorption capacity (322.6 mg/g) for removal of uranyl ions from wastewater at a pH of 4. The adsorption process is consistent with the quasisecond-order kinetic equation, and the isotherm and kinetic data are accurately described by the Langmuir isothermal adsorption model. Furthermore, the magnetic CuFe2O4/PANI displays stable adsorption performance for uranyl ions after five cycles of recovery in acid medium, which indicates it possesses good recovery due to its magnetism and excellent regeneration ability for reusability.

scholarly journals Determination of Phthalate Esters in Beverages and Water Samples by Solid Phase Extraction with Resin Based COFs as Filler

Water ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 3338
Author(s):  
Yunjie Ma ◽  
Xin Gao ◽  
Yang Ruan ◽  
Hang Cui ◽  
Li Zhang ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Phthalate Esters ◽  
Adsorption Behavior ◽  
Phthalate Ester ◽  
Phase Extraction ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Isothermal Adsorption ◽  
Kinetic Adsorption

Resin based covalent organic framework material was used as filler for solid phase extraction (SPE), and the solid phase extraction effect was compared with that of traditional COF material (TpBD COFs). The enrichment capacity of four phthalate esters (dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate) in beverage samples was investigated by SPE. Adsorption experiments showed that the kinetic adsorption behavior of COF materials for phthalate esters (PAEs) was more consistent with the quasi-second-order kinetic adsorption model, and the static adsorption behavior is more in line with the Freundlich isothermal adsorption model. Solid phase extraction experiments proved that the SPE column prepared with two COF materials as adsorbents had good adsorption effects, high recovery (water: 97.99–100.56% and beverage: 97.93–100.23%) and were reusable (50 cycles), which could meet the requirements for trace detection of phthalate ester. It was found that the solid phase extraction effect was better than the four types of commercial SPE columns. The new COF material reduced the cost of monomer use and provided the possibility for its industrial production. Meanwhile, it also provided a new feasible scheme for enriching trace phthalate esters in practical samples.

scholarly journals Adsorption Study of Rhodamine B and Methylene Blue Dyes with ZSM-5 Directly Synthesized from Bangka Kaolin without Organic Template

2019 ◽  
Vol 20 (1) ◽  
pp. 130 ◽  
Author(s):  
Ani Iryani ◽  
Hadi Nur ◽  
Mardi Santoso ◽  
Djoko Hartanto
Keyword(s):  
Methylene Blue ◽  
Rhodamine B ◽  
Contact Time ◽  
Adsorption Process ◽  
Dye Adsorption ◽  
Standard Entropy ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Isothermal Adsorption ◽  
Initial Concentration

Rhodamine B (RB) and Methylene Blue (MB) dyes adsorption using adsorbent ZSM-5 synthesized from Bangka kaolin were investigated in this study. The effects of the initial concentration, contact time and temperature on the adsorption process were also analyzed. The effect of the initial concentration and contact time played an important role in the adsorption process; however, the effect differs significantly in both dyes. The temperature plays little role in the dye adsorption process. The results showed the adsorption process occurred in ZSM-5 adhere to Langmuir isothermal adsorption model showing that the adsorption process occurred to be monolayer. Based on the kinetics studies, the pseudo-first-order kinetic model represents the adsorption kinetics that occurs for both dyes onto the synthesized ZSM-5. Thermodynamic parameters namely Gibbs free energy (ΔG°), standard entropy changes (ΔS°) and standard enthalpy (ΔH°) reveal that the adsorption process onto ZSM-5 for both dyes was spontaneous and exothermic.

scholarly journals Preparation of sustainable non-combustion filler substrate from waterworks sludge/aluminum slag/gypsum/silica/maifan stone for phosphorus immobilization in constructed wetlands

2019 ◽  
Vol 80 (1) ◽  
pp. 153-163 ◽  
Author(s):  
Guanghui Wang ◽  
Jingqing Gao ◽  
Rongxue Yang ◽  
Jingshen Zhang ◽  
Han Guo ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Phosphorus Removal ◽  
Adsorption Mechanism ◽  
High Efficiency ◽  
Removal Rate ◽  
Combustion Process ◽  
Speciation Analysis ◽  
Adsorption Model ◽  
Isothermal Adsorption ◽  
Phosphorus Adsorption

Abstract In this study, an artificial wetland filler matrix capable of effectively fixing phosphorus was prepared using a non-combustion process to save energy. To evaluate the adsorption performance of this filler, adsorption experiments were performed and the phosphorus adsorption mechanism characterization was studied. An alkaline environment was found to be conducive to the increase of adsorption capacity, but excessive alkalinity was not conducive to adsorption. Static adsorption experiments showed that the phosphorus removal rate could reach 95% in the simulated phosphorus-containing wastewater after adsorption completion. The adsorption process is closely simulated by the pseudo-second-kinetic adsorption model. The isothermal adsorption experiment data were consistent with the Langmuir and the Freundlich adsorption isotherms. The characterization results showed a large number of micropores and adsorption binding sites inside and on the surface of the filler. Speciation analysis on the adsorbed phosphorus revealed that chemisorption by calcium in this filler was the dominant adsorption mechanism. The research results of this study provide the basis and reference for the development of high-efficiency phosphorus removal filler in constructed wetlands.

scholarly journals Adsorption of As(III), Pb(II), and Zn(II) from Wastewater by Sodium Alginate Modified Materials

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Hongchuan Li ◽  
Rui Jin ◽  
Hongxiang Hu ◽  
Yusef Kianpoor Kalkhajeh ◽  
Yingying Zhao ◽  
...  
Keyword(s):  
Sodium Alginate ◽  
High Efficiency ◽  
Removal Rate ◽  
Order Kinetic ◽  
Isothermal Adsorption ◽  
Adsorption Models ◽  
Freundlich Model ◽  
Solid Ratio ◽  
Composite Gel ◽  
Pseudo Second Order

Sodium alginate (SA), polyvinyl oxide (PEO), and ceramic nanomaterials were used to prepare alginate composite gel. The present study examined the removal rate and adsorption capacity of alginate composite gel for removal of wastewater As(III), Pb(II), and Zn(II). Batch experiments were conducted to study the influence of experimental parameters such as pH and temperature, as well as the mechanism of As(III), Pb(II), and Zn(II) adsorption with the new adsorbent. The results showed the high efficiency of sodium alginate composite gel for removal of wastewater As(III), Pb(II), and Zn(II). Under the condition of the best liquid-solid ratio and the contact time, the removal rates of As(III), Pb(II), and Zn(II) were 67.42%, 95.31%, and 93.96%, respectively. The pseudo-second-order kinetic equation was superior to fit the adsorption kinetics process. The isothermal adsorption models of As(III) and Pb(II) fitted well with the Freundlich model, and Zn(II) fitted well with the Langmuir model. The results of SEM, EDS, XPS, and FTIR analyses revealed that the adsorption process occurred mainly via chemisorption. The results of the present study suggest that new adsorbents can be effectively utilized for As(III), Pb(II), and Zn(II) removal from water.

scholarly journals Equilibrium, Kinetic and Thermodynamic Studies for Sorption of Phosphate from Aqueous Solutions Using ZnO Nanoparticles

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1397
Author(s):  
Tra Huong Do ◽  
Van Tu Nguyen ◽  
Quoc Dung Nguyen ◽  
Manh Nhuong Chu ◽  
Thi Cam Quyen Ngo ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Zno Nanorods ◽  
Phosphate Adsorption ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Isothermal Adsorption ◽  
Adsorption Time ◽  
X Ray ◽  
Zno Nanomaterials

In this study, ZnO nanoparticles were fabricated by using the hydrothermal method for adsorption of phosphate from wastewater. The obtained ZnO nanorods were characterized by powder X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), specific surface area (BET) and energy dispersive X-ray spectroscopy (EDS). The ZnO materials were applied for adsorption of phosphate from water using batch experiments. The effects of pH (4–10), adsorption time (30–240 min), the amount of adsorbent (0.1–0.7 g/L) and initial concentration of phosphate (147.637–466.209 mg/L) on the adsorption efficiency were investigated. The optimum condition was found at pH = 5 and at an adsorption time of 150 min. The adsorption was fitted well with the Langmuir isotherm and the maximum adsorption capacity was calculated to be 769.23 mg/g. These results show that ZnO nanomaterial would highly promising for adsorbing phosphate from water. The adsorption of phosphate on ZnO nanomaterials follows the isothermal adsorption model of Langmuir, Tempkin and Freundlich with single-layer adsorption. There is weak interaction between the adsorbent and the adsorbate. Phosphate adsorption of the ZnO nanomaterials follows Lagergren’s apparent second-order kinetic model and was spontaneous and exothermic.

scholarly journals The performance of calcined serpentine to simultaneously remove fluoride, iron and manganese

2021 ◽  
Author(s):  
Xilin Li ◽  
Qi Wang ◽  
Ling Liu ◽  
Siyuan Liu
Keyword(s):  
Kinetic Equation ◽  
Metal Salt ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Isothermal Adsorption ◽  
Manganese Removal ◽  
Isotherm Adsorption ◽  
High Fluoride ◽  
Iron And Manganese ◽  
Order Kinetic Equation

Abstract To solve the problem of high fluoride, iron and manganese concentrations in groundwater, serpentine (Srp) was modified by metal salt impregnation, acid-base activation and calcination, and the effects of these three modifications on removal performance of Srp were compared. Specifically, the effects of the calcined serpentine (Csrp) dose, reaction time, pH, and temperature on the removal performance of F−, Fe2+ and Mn2+ on Csrp were analysed. An isothermal adsorption model and adsorption kinetic equation were established and confirmed through SEM, EDS, XRD and FTIR spectroscopy to analyse the mechanism of removing F−, Fe2+ and Mn2+ by Csrp. The results show that when 3 g/L Csrp was used to treat water samples with 5 mg/L F−, 20 mg/L Fe2+, and 5 mg/L Mn2+ (pH of 6, reaction temperature of 35 °C, and time of 150 min), the removal rates of F−, Fe2+, and Mn2+ were 94.3%, 99.0%, 98.9%, respectively. The adsorption of F−, Fe2+ and Mn2+ on Csrp follows the quasi-second-order kinetic equation and Langmuir isotherm adsorption model. After 5 cycles of regeneration of Csrp, Csrp can still maintain good properties of fluoride,iron and manganese removal.

Sign in / Sign up

Export Citation Format

Share Document