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Chen, Chengguang
- Removal of High Concentration of Ammonia from Wastewater by the Ion Exchange Resin
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Authors
Affiliations
1 College of Life Science, Shaoxing University, Shaoxing, 312000, P.R., CN
2 Department of Pharmacology and Health, Shaoxing University Yuanpei College, Shaoxing, 312000, P.R., CN
1 College of Life Science, Shaoxing University, Shaoxing, 312000, P.R., CN
2 Department of Pharmacology and Health, Shaoxing University Yuanpei College, Shaoxing, 312000, P.R., CN
Source
Nature Environment and Pollution Technology, Vol 16, No 1 (2017), Pagination: 261-264Abstract
Nitrogen (N) is an essential element for living organisms in aquatic ecosystem. However, excess nitrate in this ecosystem could degrade water quality due to eutrophication. Ammonia is usually found in aqueous environments. It affects fish and other aquatic life and recreational use of water. In this study, the acidic ion exchange resins were chosen as adsorbent to adsorb the high concentration of ammonia from wastewater. The experimental results showed that reaction of temperature, the amount of the ion exchange resins and reaction time had an important influence on the removal rate of high concentration of ammonia from wastewater. The experimental data correlated well with the Langmuir adsorption isotherm. It was also suggested that the adsorption process was homogeneous adsorption. The ammonia from aqueous solution adsorption on the acidic ion exchange resins was a monolayer adsorption.
Keywords
Ammonia, Acidic Ion Exchange Resin, Adsorption Isotherm.Full Text
References
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- The Adsorption Capacity and Influencing Factors of Cr3+ by the Modified Zeolite from Fly Ash
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Authors
Affiliations
1 Department of Architecture Engineering, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
1 Department of Architecture Engineering, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 3 (2017), Pagination: 867-871Abstract
In this study, the modified zeolite from fly ash was prepared and used as an adsorbent for removal of Cr3+ ion from aqueous solution. The characteristic of the modified zeolite was analysed. The adsorption capacity and influencing factors, such as contact time, pH in solution, the modified zeolite dosage, initial concentration of Cr3+ and temperature, were discussed in detail by the adsorption experiments. The experimental results showed that the modified zeolite from fly ash, own high adsorption capacity for Cr3+ ion in aqueous solution. The influencing factors had an important influence on the adsorption capacity. The removal efficiency of Cr3+ ion increased with the increase of the modified zeolite dosage. However, the removal efficiency of Cr3+ ion decreased with the increase of the initial concentration of Cr3+ ion in aqueous solution. The experimental results showed that the modified zeolite from fly ash has a strong potential ability for removal of Cr3+ ion in aqueous solution.Keywords
Adsorption, Cr3+ Ion, Modified Zeolite, Fly Ash.Full Text
- Study on the Degradation of Azo Dye Wastewater by Zero-Valent Iron
Abstract Views :448 |
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Authors
Affiliations
1 College of Pharmacy and Health, Shaoxing University Yuanpei College, Shaoxing, 312000,, CN
2 Department of Environmental Monitor Station, Qingtian, Zhejiang, 323900, CN
3 College of Life Science, Shaoxing University , Shaoxing, 312000, CN
1 College of Pharmacy and Health, Shaoxing University Yuanpei College, Shaoxing, 312000,, CN
2 Department of Environmental Monitor Station, Qingtian, Zhejiang, 323900, CN
3 College of Life Science, Shaoxing University , Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 17, No 2 (2018), Pagination: 479-483Abstract
Wastewater from fabric and yarn dyeing impose serious environmental problems because of their colour and potential toxicity. The release of coloured wastewaters in ecosystems is a dramatic source of aesthetic pollution, eutrophication and perturbations in aquatic life. The most common group of commercial dyes used in the textile industries is azo dyes. The degradation of azo dye wastewater by zero-valent iron was investigated. The dye of C.I. Reactive Red 15 was chosen as object in the experiment. The effects of the dosage of zero-valent iron, pH in solution, reaction time and the initial azo dye concentration on the decolorization were studied in detail. The results showed that the pH value, the dosage of zero-valent iron and the initial azo dye concentration had an important impact on azo dye decolorization. High decolorization efficiency of azo dye wastewater by zero-valent iron was achieved under the optimal condition. The zero-valent iron was also proved to be a universal and efficient reductant for rapid decolorization of the azo dye wastewater. This method can be applied into the treatment of the azo dye wastewater.Keywords
Decolorization, Azo Dye Wastewater, Zero-Valent Iron, C.I. Reactive Red 15.Full Text
References
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