PMAA-g-CS/Loess Composite for Removing Lead Ions

2016 ◽  
Vol 680 ◽  
pp. 543-546 ◽  
Author(s):  
Yu Feng He ◽  
Yin Wang ◽  
Wen Zheng Qian ◽  
Gui Fang Yan ◽  
Rong Min Wang
Keyword(s):  
Methacrylic Acid ◽  
Removal Rate ◽  
Cost Effective ◽  
Lead Ions ◽  
Isotherm Model ◽  
Order Kinetic ◽  
Toxic Heavy Metal ◽  
Cost Effective Method ◽  
Order Kinetic Model ◽  
Polymer Adsorbent

Lead is a toxic heavy metal that has caused serious public health problems. It is necessary to find a cost effective method to deal with wastewater containing lead. In this paper, a novel composite polymer adsorbent, poly (methacrylic acid)-grafted chitosan /Loess composite (PMAA-g-CS/LC) was prepared through graft copolymerization reaction of methacrylic acid and chitosan in the presence of loess. The polymer adsorbent (PMAA-g-CS/LC) was characterized and applied to remove lead ions. It was found that the removal rate of Pb (II) reached to 99%. Adsorption dynamics were consistent with pseudo-second-order kinetic model and isotherm model can meet the Langmuir isotherm model.

Loess Composited PMAA-CS for Removing Methylene Blue

2018 ◽  
Vol 768 ◽  
pp. 231-235
Author(s):  
Ya Shen ◽  
Yin Wang ◽  
Yu Feng He ◽  
Rong Min Wang
Keyword(s):  
Methylene Blue ◽  
Removal Rate ◽  
Isotherm Model ◽  
Order Kinetic ◽  
Great Contribution ◽  
Adsorption Dynamics ◽  
Order Kinetic Model ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Polymer Adsorbent

Dyes have made a great contribution to the progress of this beautiful and bright world,but a large amount of wastes containing dyes have been discharged into the receiving aquatic environment. In this paper, a loess composited polymer adsorbent, poly (methacrylic acid)-grafted chitosan/Loess composite (PMAA-CS/ LC), was applied to remove methylene blue (MB). It was found that the removal rate of MB reached to 98.6% under the optimal condition of adsorption. Adsorption dynamics were consistent with pseudo-second-order kinetic model and isotherm model can meet the Langmuir isotherm model.

The Bentonite Copolymer Composite for Removing Lead Ions

2013 ◽  
Vol 750-752 ◽  
pp. 47-50
Author(s):  
Wen Juan He ◽  
Yu Feng He ◽  
Zhen Hua Zhang ◽  
Ju Hua Guo ◽  
Rong Min Wang
Keyword(s):  
Kinetic Model ◽  
Maleic Anhydride ◽  
In Situ Polymerization ◽  
Removal Rate ◽  
Order Kinetic ◽  
Adsorption Dynamics ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Polymer Adsorbent

In this paper, a new kind of clay copolymer adsorbent, bentonite compositing with maleic anhydride (MAH)-acrylic acid (AA)-vinyl acetate (VAc) copolymer (NaB/PMAV) was prepared by in-situ polymerization. It was used as polymer adsorbent for removing Pb (II) ions in wastewater.. Under the optimal condition of adsorption, the removal rate reached to 94.4% and the adsorption capacity got to 235.9 mg/g. Adsorption dynamics were consistent with pseudo-second-order kinetic model and isotherm model can meet the Langmuir isotherm.

Loess Based Copolymer Composite for Removing Basic Fuchsin

2014 ◽  
Vol 633 ◽  
pp. 165-168 ◽  
Author(s):  
Li Wang ◽  
Wen Juan He ◽  
Yu Feng He ◽  
Hong Li ◽  
Rong Min Wang
Keyword(s):  
Kinetic Model ◽  
Optimal Condition ◽  
Removal Rate ◽  
Freundlich Isotherm ◽  
Order Kinetic ◽  
Basic Fuchsin ◽  
Adsorption Dynamics ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Polymer Adsorbent

Loess based copolymer (L/CoPolym), a typical silicate minerals / copolymer composite, was used as polymer adsorbent for removing basic fuchsin (BF) in wastewater. Under the optimal condition of adsorption, the removal rate of BF reached to 98.2%, and the adsorption capacity got to 565.0 mg/g. Adsorption dynamics were consistent with pseudo-second-order kinetic model and isotherm model can meet the Freundlich isotherm.

Biocompatible MIP-202 Zr-MOF Tunable Sorbent for Cost-Effective Decontamination of Anionic and Cationic Pollutants From Waste Solutions

2020 ◽  
Author(s):  
Kamal Diab ◽  
Eslam Salama ◽  
Hassan Shokry Hassan ◽  
Ahmed Abd El-moneim ◽  
Marwa Elkady
Keyword(s):  
Cost Effective ◽  
Order Kinetic ◽  
Anionic Dyes ◽  
Toxic Heavy Metal ◽  
Water Pollutants ◽  
Dye Pollutants ◽  
Monolayer Adsorption ◽  
Order Kinetic Model ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order

Abstract This reported work aims to fabricate an eco-friendly Zr bio-based MOF and assessment its adsorption efficiency towards the cationic and anionic dye pollutants including methylene blue (MB) and direct red 81 (DR-81), respectively. Also, its adsorption tendency for the highly toxic heavy metal of hexavalent chromium (Cr(VI)) was compared with dyes. The adsorption performance of bio-MOF showed that the maximum monolayer adsorption capacities were recorded as 79.799 mg/g for MB, 36.071 mg/g for DR-81, and 19.012 mg/g for Cr(VI). Meanwhile, the optimum dosage of as-synthesized MIP-202 bio-MOF was 0.5, 1, and 2 g L-1 for MB, DR-81, and Cr(VI), respectively. Thermodynamic analysis demonstrated the spontaneous, thermodynamically, and endothermic nature of the decontamination processes onto the fabricated Zr bio-based MOF. The adsorption data were fitted by Langmuir isotherm model compared with Freundlich and Temkin models for all studied water pollutants. Pseudo-second-order kinetic model was a fit model for description of the adsorption kinetics of the different cationic and anionic pollutants onto Zr bio-based MOF. These outcomes indicated that Zr bio-based MOF has potential application for adsorption of different types of industrial water pollutants including cationic and anionic dyes and heavy metals.

scholarly journals Biocompatible MIP-202 Zr-MOF tunable sorbent for cost-effective decontamination of anionic and cationic pollutants from waste solutions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kamal E. Diab ◽  
Eslam Salama ◽  
Hassan Shokry Hassan ◽  
Ahmed Abd El-moneim ◽  
Marwa F. Elkady
Keyword(s):  
Cost Effective ◽  
Order Kinetic ◽  
Anionic Dyes ◽  
Toxic Heavy Metal ◽  
Water Pollutants ◽  
Dye Pollutants ◽  
Monolayer Adsorption ◽  
Order Kinetic Model ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order

AbstractThis reported work aims to fabricate an eco-friendly Zr bio-based MOF and assessment its adsorption efficiency towards the cationic and anionic dye pollutants including methylene blue (MB) and direct red 81 (DR-81), respectively. Also, its adsorption tendency for the highly toxic heavy metal of hexavalent chromium (Cr(VI)) was compared with dyes. The adsorption performance of bio-MOF showed that the maximum monolayer adsorption capacities were recorded as 79.799 mg/g for MB, 36.071 mg/g for DR-81, and 19.012 mg/g for Cr(VI). Meanwhile, the optimum dosage of as-synthesized MIP-202 bio-MOF was 0.5, 1, and 2 g L−1 for MB, DR-81, and Cr(VI), respectively. Thermodynamic analysis demonstrated the spontaneous, thermodynamically, and endothermic nature of the decontamination processes onto the fabricated Zr bio-based MOF. The adsorption data were fitted by Langmuir isotherm model compared with Freundlich and Temkin models for all studied water pollutants. Pseudo-second-order kinetic model was a fit model for description of the adsorption kinetics of the different cationic and anionic pollutants onto Zr bio-based MOF. These outcomes indicated that Zr bio-based MOF has potential application for adsorption of different types of industrial water pollutants including cationic and anionic dyes and heavy metals.

scholarly journals A study on Biosorptive Removal of Cd from Wastewater using Chironomid Larvae (Diptera: Chironomidae)

2014 ◽  
Vol 10 (3) ◽  
pp. 2415-2425
Author(s):  
Yeon Jae Bae ◽  
Keon Sang Ryoo ◽  
Kijong Cho ◽  
Min Jeong Baek
Keyword(s):  
Public Health Problem ◽  
Cost Effective ◽  
Sorption Kinetics ◽  
Isotherm Models ◽  
Order Kinetic ◽  
Sorption Data ◽  
Chironomid Larvae ◽  
Cost Effective Method ◽  
Order Kinetic Model ◽  
Treatment Technologies

Cadmium (Cd) has caused serious public health problem due to its toxic nature. It is necessary to find a cost-effective method to dispose of wastewater containing Cd. Chironomid larvae as an alternative to conventional adsorbents were applied to remove Cd from wastewater. The sorption studies of Cd were carried out using laboratory-reared Glyptotendipes tokunagai (Diptera: Chironomidae) larvae. Kinetic and sorption capacity of chironomid larvae for Cd were determined by means of controlled experiments in a batch system. It was observed that removal efficiency of Cd was largely concentration dependent and more effective in lower concentration. At equilibrium, Cd was removed up to roughly 53 %. The sorption kinetics were found to conform to the pseudo-first-order kinetic model with a good correlation. Equilibrium sorption data were best fitted to the both Freundlich and Langmuir isotherm models owing to their correlation coefficient R2 values greater than 0.99. Considering the values obtained from isotherm constants 1/n and r, it is confirmed that Cd is sorbed favorably by chironomid larvae. With its relatively high removal capability for Cd, Chironomid larvae have enormous potential for application in wastewater treatment technologies. 

scholarly journals Facile synthesis of mesoporous calcium carbonate particles with finger citron residue as template and their adsorption performances for Congo red

2017 ◽  
Vol 36 (3-4) ◽  
pp. 872-887 ◽  
Author(s):  
Luying Ma ◽  
Guihua Zhao ◽  
Yaoyao Fang ◽  
Wei Dai ◽  
Na Ma
Keyword(s):  
Photoelectron Spectroscopy ◽  
Congo Red ◽  
Large Scale ◽  
Dye Adsorption ◽  
Cost Effective ◽  
Order Kinetic ◽  
Anionic Dyes ◽  
Cost Effective Method ◽  
Order Kinetic Model ◽  
Red Dye

Herein, we demonstrate a simple and cost-effective method to prepare the new hierarchically Ni-doped porous CaCO3 monoliths in a large scale by mineralizing finger citron residue templates with a calcium acetate precursor. The morphology, microstructure, and element composition of as-prepared adsorbents are characterized by Scanning Electron Microscope (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM), and N2 adsorption, respectively. Adsorption performance of anionic dye Congo red was investigated in a batch experiment. The results showed that pseudo-second-order kinetic model and Langmuir adsorption isotherm matched well for the Congo red adsorption. Compared with previously reported adsorbents, due to positive and negative charge effect between Congo red and Ni, Ni-doped porous CaCO3 monoliths demonstrated a superior Congo red dye adsorption capability. The results of the present study substantiate that Ni-doped porous CaCO3 monoliths is a promising adsorbent for the removal of the anionic dyes from wastewater.

Bentonite-Copolymer Composite for Removing Basic Fuchsin

2017 ◽  
Vol 726 ◽  
pp. 345-349 ◽  
Author(s):  
Yu Feng He ◽  
Hong Li ◽  
Zhen Hua Zhang ◽  
Ting Jun Lu ◽  
Rong Min Wang
Keyword(s):  
Freundlich Isotherm ◽  
Cost Effective ◽  
Molecular Formula ◽  
Order Kinetic ◽  
Basic Fuchsin ◽  
Cost Effective Method ◽  
Pseudo Second Order ◽  
Polymer Adsorbent ◽  
In Situ Copolymerization

Basic Fuchsin (BF) is a toxic triphenylmethane dye with molecular formula C20H20ClN3, which is easy to caused serious public health problems. There is a need to develop a cost effective method for its removal from the wastewater containing BF. Here, a novel composite polymer adsorbent, poly (maleic anhydride - acrylic acid - vinyl acetate)/Na-bentonite composite cross-linked with N,N'-methylenebisacrylamide was prepared by in situ copolymerization. The polymer adsorbent (NaB-PMAVM) was characterized and applied to remove BF. It was found that the removal of BF reached to 95.96%. The adsorption isotherms and kinetics were best-fit with the Freundlich isotherm model and the pseudo-second-order kinetic, respectively.

Adsorption Performance of Methylene Blue on Modified Coal Gangue

2013 ◽  
Vol 807-809 ◽  
pp. 521-525
Author(s):  
Hui Juan Wang ◽  
Xiao Li Wang ◽  
Li Xiang Wang
Keyword(s):  
Removal Rate ◽  
Freundlich Isotherm ◽  
Coal Gangue ◽  
Isotherm Model ◽  
Order Kinetic ◽  
Adsorption Effect ◽  
Intra Particle Diffusion ◽  
Order Kinetic Model ◽  
Rate Of Absorption ◽  
Langmuir Isotherm Model

The alkali heat modification used in coal gangue. And the adsorption effect of MB on original gangue and modified gangue were observed. The results were showed that removal rate of MB was 96.87% and 45.45% by modified gangue and original gangue under the conditions of MB initial concentration 50mg·L-1. The adsorption mechanism was discussed based on Freundlich isotherm model and Langmuir isotherm model. It was proved that MB was easy to be adsorbed by modified coal gangue and the adsorption was belong to monolayer adsorption.The pseudo-second-order kinetic model was best accord to adsorption. And the rate of absorption was control by intra-particle diffusion.

scholarly journals Development of Biochars Derived from Water Bamboo (Zizania latifolia) Shoot Husks Using Pyrolysis and Ultrasound-Assisted Pyrolysis for the Treatment of Reactive Black 5 (RB5) in Wastewater

Water ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1615
Author(s):  
Thanh Tam Nguyen ◽  
Hung-Hsiang Chen ◽  
Thi Hien To ◽  
Yu-Chen Chang ◽  
Cheng-Kuo Tsai ◽  
...  
Keyword(s):  
Cost Effective ◽  
Reactive Black 5 ◽  
Order Kinetic ◽  
Sem Images ◽  
Zizania Latifolia ◽  
Surface Areas ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Ultrasound Assisted ◽  
Green Technique

Adsorbent made by carbonization of biomass under oxygen-limited conditions has become a promising material for wastewater treatment owing to its cost-effective, simple, and eco-friendly processing method. Ultrasound is considered a green technique to modify carbon materials because it uses water as the solvent. In this study, a comparison of Reactive Black 5 (RB5) adsorption capacity between biochar (BC) generated by pyrolysis of water bamboo (Zizania latifolia) husks at 600 °C and ultrasound-assisted biochar (UBC) produced by pyrolysis at 600 °C assisted by ultrasonic irradiation was performed. UBC showed a greater reaction rate and reached about 80% removal efficiency after 4 h, while it took 24 h for BC to reach that level. Scanning electron microscope (SEM) images indicated that the UBC morphology surface was more porous, with the structure of the combination of denser mesopores enhancing physiochemical properties of UBC. By Brunauer, Emmett, and Teller (BET), the specific surface areas of adsorbent materials were analyzed, and the surface areas of BC and UBC were 56.296 m2/g and 141.213 m2/g, respectively. Moreover, the pore volume of UBC was 0.039 cm3/g, which was higher than that of BC at 0.013 cm3/g. The adsorption isotherms and kinetics revealed the better fits of reactions to Langmuir isotherm and pseudo-second-order kinetic model, indicating the inclination towards monolayer adsorption and chemisorption of RB5 on water bamboo husk-based UBC.

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