The Decoloration Property of Modified Reed Absorbent for Alkaline Fuchsin Wastewater

2013 ◽  
Vol 821-822 ◽  
pp. 365-368
Author(s):  
Yu Ying
Keyword(s):  
Adsorption Isotherm ◽  
Ph Value ◽  
Adsorption Time ◽  
Adsorption Condition ◽  
Adsorption Temperature ◽  
Naoh Solution ◽  
Adsorbent Dose

The modified reed absorbent was obtained by the being treated process with NaOH solution. The decoloration property of modified reed for alkaline fuchsin was studied under different conditions. The effects of adsorbent dose, adsorption temperature, adsorption time and pH value on the decoloration property were investigated, and the optimal adsorption condition was gotten,, the discoloration rate was above 95%. The adsorption isotherm was well represented by the Langmuir.

scholarly journals Preparation of modified pomelo peel's pulp adsorbent and its adsorption to uranyl ions

2019 ◽  
Vol 6 (3) ◽  
pp. 181986 ◽  
Author(s):  
Pengfei Yang ◽  
Yuanhe Xu ◽  
Jie Tuo ◽  
Ang Li ◽  
LixiAng Liu ◽  
...  
Keyword(s):  
Adsorption Process ◽  
Ph Value ◽  
Raw Material ◽  
Uranyl Ions ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Adsorption Condition ◽  
Adsorption Temperature ◽  
Freundlich Adsorption Isotherm ◽  
Pseudo Second Order

Using pomelo peel's pulp (PPP) as raw material, a new chemically modified PPP was prepared by the process of fermentation, cooking, freeze-drying, and so on. The adsorbent has been characterized by EDS, IR, BET and SEM. The factors of different adsorption conditions such as pH value, adsorption temperature, mass of adsorbent, adsorption time and initial concentration of UO 2 2+ were investigated. The adsorption mechanism was explored by adsorption thermodynamics and kinetics experiments. The results indicate that the pH value is 6.0, the dosage of adsorbent is 500 mg l –1 , the temperature is 50°C and the adsorption time is 90 min, which is the best adsorption condition. When the initial concentration of UO 2 2+ is 35 mg l –1 , the adsorbed amount of uranyl ions by the modified PPP adsorbent can reach 42.733 mg g −1 , 26.8% higher than the adsorption amount of unmodified adsorbent (31.276 mg g −1 ), which is obviously enhanced. The kinetic and thermodynamic experiments show that the adsorption process is in good agreement with the pseudo second-order kinetics model, that it is an endothermic reaction, and the reaction is spontaneous. The adsorption process is entropy-dominated. The Freundlich adsorption isotherm can describe the adsorption process more accurately.

Response Surface Optimization of Adsorption Conditions of Neutral Red Wastewater by Brewer's Grains

2014 ◽  
Vol 955-959 ◽  
pp. 2859-2863
Author(s):  
Xin Long Jiang ◽  
Yi Hua Jiang ◽  
Cheng Gang Cai
Keyword(s):  
Absorption Rate ◽  
Ph Value ◽  
Neutral Red ◽  
Optimal Parameters ◽  
Adsorption Time ◽  
Response Surface Optimization ◽  
Adsorption Temperature ◽  
Response Optimization ◽  
Maximal Absorption ◽  
Adsorbent Particle

Abstract: Surface response optimization of adsorption conditions of neutral red wastewater by brewer's grains with the factors of pH value, initial concentration,adsorption temperature, adsorption time, adsorbent quantity and the response of adsorption rate were studied. The optimal parameters for adsorption conditions were of adsorbent concentration of 191.24 mg·L-1, adsorbent particle size of 60~80 mesh,pH 4.65, adsorbent amount of 2.56 g·L-1, adsorption time and temperature of 1.92 h and 30°C, respectively. The maximal absorption rate got 99.16%.The brewer's grains is a promising, cheap, efficient, new biological materials of adsorption for neutral red in wastewater.

Research on Influence Factors of Bamboo Charcoal Adsorb Ammonia Nitrogen in Wastewater

2011 ◽  
Vol 356-360 ◽  
pp. 493-497 ◽  
Author(s):  
Zong Ning Li ◽  
Zong Qiang Zhu ◽  
Mei Na Liang ◽  
Hong Dong Qin ◽  
Yi Nian Zhu
Keyword(s):  
Ph Value ◽  
Influence Factors ◽  
Ammonia Nitrogen ◽  
Bamboo Charcoal ◽  
Solution Ph ◽  
Adsorption Ability ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Adsorption Temperature ◽  
Better Than

The influences of adsorption temperature, adsorption time, dosing quantity, adsorption environment pH value, initial concentration and bamboo charcoal type on adsorption of bamboo charcoal adsorb ammonia nitrogen in wastewater are studied. The result shows that the maximum adsorption values are 1.1715 mg/g and 0.9115 mg/g respectively at 25°C and 40°C. Bamboo charcoal can easily absorb ammonia nitrogen at low temperature condition. 180 min is a suitable adsorption time. Increasing bamboo charcoal dosing quantity is helpful to improve efficiencies of ammonia nitrogen removal in wastewater, but the adsorption capacity is declining as bamboo charcoal dosing quantity increasing. Solution pH value has a great impact on the adsorbed amount, the adsorbed effect in alkaline solution is much better than in acid one’s. The adsorption ability of the moderate temperature bamboo charcoal is higher than the high temperature one’s.

Adsorption of Cesium from Aqueous Solution by Modified Montmorillonite

2013 ◽  
Vol 395-396 ◽  
pp. 591-594
Author(s):  
Si Man Liu ◽  
Yong Zhou Quan
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Ph Value ◽  
Influence Factors ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Cesium Ions ◽  
Modified Montmorillonite ◽  
Adsorption Temperature ◽  
As Adsorption

The modified montmorillonite is used to adsorb cesium ions from aqueous solution. The influence factors such as adsorption time, adsorption temperature, adsorption pH, adsorbent dosage and initial concentration was studied in the experiment. The results show the optimum adsorption time is 100 min, the best adsorption temperature is 50 °C, and pH value is 10. When the concentration of cesium ions is 160 mg/L, the adsorption capacity can be up to 9.217 mg/g.

Study on Processing Technology of Oil-Tea-Cake on Acid Dye Neutral Red Wastewater

2014 ◽  
Vol 915-916 ◽  
pp. 922-926
Author(s):  
Xin Long Jiang ◽  
Yi Hua Jiang ◽  
Cheng Gang Cai
Keyword(s):  
Absorption Rate ◽  
Ph Value ◽  
Orthogonal Experiment ◽  
Neutral Red ◽  
Optimal Parameters ◽  
Wastewater Discharge ◽  
Acid Dye ◽  
Adsorption Time ◽  
Adsorption Temperature ◽  
Maximal Absorption

Orthogonal experiment optimization of adsorption conditions with the factors of pH value, adsorption temperature, adsorption time, amount of adsorbent of neutral red wastewater by oil tea cake were studied.The results showed that optimum optimal parameters for adsorption conditions were of adsorbent concentration of 200 mg·L-1, adsorbent particle size of 60~80 mesh, pH 6.0, adsorbent amount of 2.0 g·L-1, adsorption time and temperature of 1.5 h and 30 °C, respectively. The maximal absorption rate got 97.15%.The wastewater of treatment meet the national wastewater discharge standard.The oil tea cake is a promising, cheap, efficient, new biological materials of adsorption for neutral red in wastewater.

Modified Zeolite and Treatment with Cr3+ in the Wastewater

2012 ◽  
Vol 510 ◽  
pp. 683-688
Author(s):  
Jian Li Yang ◽  
Mei Li Du ◽  
Jie Huang ◽  
Xiao Gang Yang
Keyword(s):  
Molecular Sieve ◽  
Ph Value ◽  
Research Topic ◽  
Microwave Method ◽  
Important Research ◽  
Effect Factors ◽  
Adsorption Time ◽  
Adsorption Temperature ◽  
Important Research Topic ◽  
Zeolite 4A

The ultra-zeolite is an important research topic at present. Using ultra-zeolite 4A to treat wastewater has the advantage that traditional methods do not have, so it has been concerned by many experts and scholars. This subject adopts microwave method to synthesize ultra-zeolite 4A. Then using the prepared ultra-zeolite 4A to adsorb Cr3+ in wastewater. Study on the effect factors such as pH value, adsorption temperature, etc. The conclusion shows that ultra-molecular sieve 4A has been successfully synthsized by microwave method. In experiment of absorption wastewater containing Cr3 + we has found when the concentration of solution containing Cr3 + is 400mg / L, pH =4, temperature is 25 and adsorption time is10 minutes, which ultra-zeolite 4A removes Cr3+ is better.

Response Surface Optimization of Adsorption Conditions of Cr (VI) from Wastewater by Modified Brewer's Grains

2013 ◽  
Vol 781-784 ◽  
pp. 1931-1936
Author(s):  
Xin Long Jiang ◽  
Yi Hua Jiang
Keyword(s):  
Particle Size ◽  
Absorption Rate ◽  
Ph Value ◽  
Optimal Parameters ◽  
Adsorption Time ◽  
Response Surface Optimization ◽  
Adsorption Temperature ◽  
Response Optimization ◽  
Maximal Absorption ◽  
Adsorbent Particle

Surface response optimization of Adsorption Conditions of Cr(VI) wastewater by modified brewer's grains with the factors of pH value, adsorption temperature, adsorption time, amount of adsorbent and the response of adsorption rate were studied. The optimal parameters for Adsorption Conditions were of adsorbent concentration of 60 mg·L-1, adsorbent particle size of 60~80 mesh, pH 2.23, adsorbent amount of 3.64 g·L-1, adsorption time and temperature of 1.13 h and 30 °C, respectively. The maximal absorption rate got 97.45%.The modified brewer's grains is a promising, cheap, efficient, new biological materials of adsorption for Cr (VI) in wastewater.

Adsorption Behavior of L-Histidine on a Novel Spherical Chitosan Adsorbent

2011 ◽  
Vol 236-238 ◽  
pp. 2574-2580
Author(s):  
Ming Hua Liu ◽  
Piao Piao Huang ◽  
Jian Yun Ou
Keyword(s):  
Adsorption Capacity ◽  
Ph Value ◽  
Equilibrium Adsorption ◽  
Solution Ph ◽  
Chitosan Beads ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Adsorption Temperature ◽  
Equilibrium Adsorption Capacity ◽  
Isothermal Equation

The spherical chitosan adsorbent was prepared by graft copolymerization of acrylic acid onto the cross-linked spherical chitosan beads, and then was adopted to adsorb the L-histidine. The adsorption conditions, i.e., solution pH, adsorption time, initial concentration and adsorption temperature were optimized. The spherical chitosan adsorbent showed excellent equilibrium adsorption capacity of 78.3 mg/g for the L-histidine when the solution pH value was 7.5, adsorption time was 180 min, initial concentration was 1500 mg/L and the adsorption temperature was 25 °C. Moreover, the inorganic salt of NaCl also showed great effect on the equilibrium adsorption capacity exceeding 0.8 mol/L. The static adsorption processes followed the Langmuir adsorption isothermal equation and Freundlich adsorption isothermal equation. Furthermore, L-histidine could be desorbed with 1.5 mol/L of ammonia solution, and the regeneration capacity of the spherical chitosan adsorbent was excellent.

scholarly journals Optimizing Adsorption of 17α-Ethinylestradiol from Water by Magnetic MXene Using Response Surface Methodology and Adsorption Kinetics, Isotherm, and Thermodynamics Studies

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3150
Author(s):  
Mengwei Xu ◽  
Chao Huang ◽  
Jing Lu ◽  
Zihan Wu ◽  
Xianxin Zhu ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Quadratic Model ◽  
Adsorption Efficiency ◽  
Process Variables ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Independent Variables ◽  
The Impact ◽  
Adsorbent Dose

Magnetic MXene composite Fe3O4@Ti3C2 was successfully prepared and employed as 17α-ethinylestradiol (EE2) adsorbent from water solution. The response surface methodology was employed to investigate the interactive effects of adsorption parameters (adsorption time, pH of the solution, initial concentration, and the adsorbent dose) and optimize these parameters for obtaining maximum adsorption efficiency of EE2. The significance of independent variables and their interactions were tested by the analysis of variance (ANOVA) and t-test statistics. Optimization of the process variables for maximum adsorption of EE2 by Fe3O4@Ti3C2 was performed using the quadratic model. The model predicted maximum adsorption of 97.08% under the optimum conditions of the independent variables (adsorption time 6.7 h, pH of the solution 6.4, initial EE2 concentration 0.98 mg L−1, and the adsorbent dose 88.9 mg L−1) was very close to the experimental value (95.34%). pH showed the highest level of significance with the percent contribution (63.86%) as compared to other factors. The interactive influences of pH and initial concentration on EE2 adsorption efficiency were significant (p < 0.05). The goodness of fit of the model was checked by the coefficient of determination (R2) between the experimental and predicted values of the response variable. The response surface methodology successfully reflects the impact of various factors and optimized the process variables for EE2 adsorption. The kinetic adsorption data for EE2 fitted well with a pseudo-second-order model, while the equilibrium data followed Langmuir isotherms. Thermodynamic analysis indicated that the adsorption was a spontaneous and endothermic process. Therefore, Fe3O4@Ti3C2 composite present the outstanding capacity to be employed in the remediation of EE2 contaminated wastewaters.

scholarly journals Lignocellulose@ Activated Clay Nanocomposite with Hierarchical Nanostructure Enhancing the Removal of Aqueous Zn(II)

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1710 ◽  
Author(s):  
Xiaotao Zhang ◽  
Yinan Hao ◽  
Zhangjing Chen ◽  
Yuhong An ◽  
Wanqi Zhang ◽  
...  
Keyword(s):  
Ph Value ◽  
Removal Rate ◽  
Weight Ratio ◽  
Order Kinetic ◽  
Adsorption Parameters ◽  
Hierarchical Nanostructure ◽  
Desorption Temperature ◽  
Desorption Time ◽  
Adsorption Temperature ◽  
Hcl Concentration

A lignocellulose@ activated clay (Ln@AC) nanocomposite with a hierarchical nanostructure was successfully synthesized by the chemical intercalation reaction and applied in the removal of Zn(II) from an aqueous solution. Ln@AC was characterized by N2 adsorption/desorption isotherms and X-Ray Diffraction (XRD), scanning Electron Microscope (SEM), transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FTIR) analysis, and the results indicate that an intercalated–exfoliated hierarchical nanostructure was formed. The effects of different adsorption parameters on the Zn(II) removal rate (weight ratio of Ln to AC, Ln@AC dosage, initial Zn(II) concentration, pH value, adsorption temperature, and time) were investigated in detail. The equilibrium adsorption capacity reached 315.9 mg/g under optimal conditions (i.e., the weight ratio of Ln to AC of 3:1, Ln@AC dosage of 1 g/L, initial Zn(II) concentration of 600 mg/L, pH value of 6.8, adsorption temperature of 65 °C, and adsorption time of 50 min). The adsorption process was described by the pseudo-second-order kinetic model, Langmuir isotherm model, and the Elovich model. Moreover, Zn(II) could be easily eluted by HCl, and the effects of HCl concentration, desorption temperature, and ultrasonic desorption time on desorbed amount were tested. Desorption studies revealed that with an HCl concentration of 0.25 mol/L, desorption temperature of 70 °C, and ultrasonic desorption time of 20 min, the maximum desorption capacity and efficiency were achieved at 202.5 mg/g and 64.10%, respectively. Regeneration experimental results indicated that the Ln@AC exhibited a certain recyclable regeneration performance. Due to such outstanding features, the novel Ln@AC nanocomposite proved to have great adsorption potential for Zn(II) removal from wastewater, and exhibited an extremely significant amount of adsorbed Zn(II) when compared to conventional adsorbents.

Sign in / Sign up

Export Citation Format

Share Document