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Song, Jiangping
- Adsorption of Cadmium (Cd2+) Ions from Aqueous Solutions on the Modified Montmorillonite
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1 Department of Life Science, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
1 Department of Life Science, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 2 (2016), Pagination: 503-508Abstract
Heavy metal pollution has become one of the most serious environmental problems today due to its difficulty in removal, especially in aquatic environments. The technologies for heavy metal ion removal from aqueous solutions are, chemical treatment, physico-chemical treatment and biological treatment. However, the existing methods are relatively expensive. Therefore, there is an urgency that some environmentally sound and practically feasible technologies or sorbents are needed to be developed. In this study, a modified montmorillonite was used for the removal of Cd2+ ions from aqueous solutions. The influence of various operating parameters on the adsorption process was investigated. The kinetics and equilibrium adsorption of Cd2+ ions from aqueous solutions using the modified montmorillonite were also discussed in detail. The objective of this study is to provide fundamental information on the adsorption of heavy metals from aqueous solution on the modified montmorillonite and to investigate the possible mechanisms.Keywords
Adsorption, Cd2+ Ions, Modified Montmorillonite, Kinetic Equilibrium.Full Text
References
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- Langmuir, I. 1918. The adsorption of gases on plane surfaces of glass, mica and platinum. J. Am. Chem. Soc., 40: 1361-1403.
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- Wu, P.X., Zhang, Q., Dai, Y.P., Zhu, N.W., Dang, Z., Li, P., Wu, J.H. and Wang, X.D. 2011. Adsorption of Cu(II), Cd(II) and Cr(III) ions from aqueous solutions on humic acid modified Ca-montmorillonite. Geoderma, 164: 215-219.
- Xia, L., Hu, Y.X. and Zhang, B.H. 2014. Kinetics and equilibrium adsorption of copper (II) and nickel (II) ions from aqueous solution using sawdust xanthate modified with ethanediamine. Trans. Nonferrous Met. Soc. China, 24: 868-875.
- Adsorption Isotherm and Equilibrium Process of Dye Wastewater Onto Camphor Sawdust
Abstract Views :214 |
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Authors
Affiliations
1 Department of Life Science, Shaoxing University, Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
1 Department of Life Science, Shaoxing University, Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 2 (2016), Pagination: 689-692Abstract
The textile industry plays an important role in the economies of numerous countries around the world. But the dye wastewater from the textile industry has become one of the most serious environmental problems today for its harm, especially in aquatic environments. Dyes are aromatic organic colorants and have potential applications in textile, plastic, rubber, paper and food industries. Therefore, the treatment of dye wastewater is of interest. The potential and effectiveness of the camphor sawdust was studied as an alternative adsorbent for the removal of dye wastewater. The dye Congo red was used as the pollutant. The effects of camphor sawdust dosage, pH in aqueous solution, the contact time and dye Congo red concentration on dye Congo red adsorption by the camphor sawdust were investigated. The results showed that the reaction factors had an important influence on adsorption process. The adsorption isotherm fitted better with the Langmuir model and the adsorption process was an endothermic process. The maximum adsorption capacity obtained from the Langmuir isotherm is 29.51 mg/g.Keywords
Adsorption Isotherm, Equilibrium Process, Dye Wastewater, Camphor Sawdust.Full Text
References
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- Liu, Z.G. and Zhang, F.S. 2011. Removal of copper (II) and phenol from aqueous solution using porous carbons derived from hydrothermal chars. Desalination, 267: 101-106.
- Muthukumar, M. and Selvakumar, N. 2004. Studies on the effect of inorganic salts on decoloration of acid dye effluents by ozonation. Dyes Pigm., 62: 221-228.
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- Sun, X.F., Wang, S.G., Liu, X.W., Gong, W.X., Bao, N., Gao, B.Y. and Zhang, H.Y. 2008. Biosorption of malachite green from aqueous solutions onto aerobic granules: kinetic and equilibrium studies. Bioresour. Technol., 99: 3475-3483.
- Xia, L., Hu, Y.X. and Zhang, B.H. 2014. Kinetics and equilibrium adsorption of copper (II) and nickel (II) ions from aqueous solution using sawdust xanthate modified with ethanediamine. Trans. Nonferrous Met. Soc. China, 24: 868-875.
- Zhang, H., Tang, Y., Liu, X.N., Ke, Z.G., Su, X., Cai, D.Q., Wang, X.Q., Liu, Y.D., Huang, Q. and Yu, Z.L. 2011. Improved adsorptive capacity of pine wood decayed by fungi Poria cocos for removal of malachite green from aqueous solutions. Desalination, 274: 97-104.
- Adsorption of Dye in Aqueous Solution by the Waste Polymer Activated Carbon
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Authors
Affiliations
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Life Science, Shaoxing University, Yuanpei College, Shaoxing, 312000, CN
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Life Science, Shaoxing University, Yuanpei College, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 4 (2016), Pagination: 1227-1230Abstract
The waste polymer activated carbon was prepared from tyre by NaOH activation, which was used for the adsorption of dye Direct Scarlet 4BS in aqueous solution. The influences of pH value, activated carbon dosage, adsorption time and reaction temperature on adsorption rate were discussed in details. It was shown that the activated carbon dosage, adsorption time and reaction temperature had an important effect on the removal of dye Direct Scarlet 4BS in aqueous solution. However, the removal of dye Direct Scarlet 4BS was little dependent on pH value in solution. At 0.6g of activated carbon, 60mg/L of initial dye concentration, 60min, 35°C and pH 4.0, the removal of dye Direct Scarlet 4BS reached 85.14%.Keywords
Waste Polymer, Activated Carbon, Direct Scarlet 4BS Dye, Adsorption.Full Text
References
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- Noorimotlagh, Z., Soltani, R.D.C., Khataee, A.R., Shahriyar, S. and Nourmoradi, H. 2014. Adsorption of a textile dye in aqueous phase using mesoporous activated carbon prepared from Iranian milk vetch. J. Taiwan Inst. Chem. Eng., 45(4): 1783-1791.
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- Adsorption of Bromate in Aqueous Solution by the Modified Activated Carbon
Abstract Views :129 |
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Authors
Affiliations
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Life Science, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Life Science, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 3 (2016), Pagination: 981-986Abstract
The presence of bromate in drinking water has attracted much attention, because it is a carcinogen and mutagenic to humans. Activated carbon is an effective adsorbent material widely used in water treatment. In order to enhance the adsorption of bromate ion on activated carbon, the modified activated carbon was obtained from granular activated carbon by chemical activation using cationic surfactant as an activator. The adsorption characteristics of bromate ion on the modified activated carbon were investigated through adsorption experiments. The effects of temperature, pH in solution, contact time and initial bromate concentration on bromate adsorption by the modified activated carbon were investigated. The experimental data were analysed by the Langmuir and Freundlich models of adsorption. Kinetic adsorption data were analysed by the pseudo-first-order kinetic model and the pseudo-second-order model respectively. The thermodynamics parameters were also calculated.Keywords
Adsorption, Bromate, Activated Carbon.Full Text
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