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| Treatment of Dye Wastewater by TTAC-modified Rice Straw |
| Received:January 27, 2015 |
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| KeyWord:rice straw;TTAC;modification;dye wastewater |
| Author Name | Affiliation | E-mail | | ZHOU Dao-yan | College of the Environment, Sichuan Agricultural University, Chengdu 611130, China | | | LAI Xing | College of the Environment, Sichuan Agricultural University, Chengdu 611130, China | | | WAN Xue | College of the Environment, Sichuan Agricultural University, Chengdu 611130, China | | | WU Jun | College of the Environment, Sichuan Agricultural University, Chengdu 611130, China | wuj1962@163.com | | ZHAO Xu | College of the Environment, Sichuan Agricultural University, Chengdu 611130, China | | | MENG Xiao-xia | Sichuan Research Institute of Environmental Protection, Chengdu 610041, China | | | ZHAO Dan | College of the Environment, Sichuan Agricultural University, Chengdu 611130, China | | | HUANG Chang-hong | College of the Environment, Sichuan Agricultural University, Chengdu 611130, China | |
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| Abstract: |
| In recent years there has been an increasing interest in the use of crop residues for wastewater treatments. Here a new cationic adsorbent(MRS), was obtained from rice straw(RS) by modification with fourteen alkyl trimethyl ammonium chloride(TTAC), and was then examined its performance in decolorizing dye wastewater with batch experiments. The potential adsorption and decolorization mechanism of MRS were also investigated through SEM and FT-IR. Results indicated that the appropriate modification conditions were as follows:mass ratio(RS:TTAC) of 1:2, stirring rate of 400 r·min-1, temperature of 40 ℃, and pH=7.00. Compared with RS, MRS had an even and orderly structure with more empty gaps, leading to a greater contact area and thus improving adsorption performance of MRS. FT-IR proved that TTAC modification had removed most of the hemicelluloses and lignin from RS, and successfully introduced the -NH+ group in MRS, enhancing adsorption of anionic pollutants by MRS. |
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