| 周道晏,赖星,万学,伍钧,赵旭,孟晓霞,赵丹,黄常红.TTAC改性水稻秸秆处理染料废水的研究[J].农业环境科学学报,2015,34(7):1392-1397. |
| TTAC改性水稻秸秆处理染料废水的研究 |
| Treatment of Dye Wastewater by TTAC-modified Rice Straw |
| 投稿时间：2015-01-27 |
| DOI：10.11654/jaes.2015.07.023 |
| 中文关键词: 水稻秸秆 十四烷基三甲基氯化铵 改性 染料废水 |
| 英文关键词: rice straw TTAC modification dye wastewater |
| 基金项目:四川省科技支撑项目(2014NZ0045);四川省环境保护厅重点项目(2011HB011) |
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| 中文摘要: |
| 为实现废弃秸秆资源化利用和应对染料废水污染问题,以水稻秸秆(RS)为原料,与十四烷基三甲基氯化铵(TTAC)反应制备阳离子改性秸秆(MRS)。首先考察了改性工艺对MRS脱色性能的影响,进而通过扫描电镜(SEM)和红外光谱(FT-IR)分析潜在的作用机制。结果表明,制备MRS的适宜工艺条件为:RS:TTAC质量比为1:2、搅拌速率为400 r·min-1、温度为40 ℃、pH为7.00。与RS相比,MRS呈均匀有序的片状且存在较多缝隙,增加了其和染料的接触面积,有利于提高吸附性能。FT-IR表明,改性处理将RS中大部分木质素和半纤维素脱除,并引入-NH+,加强了MRS与阴离子污染物的电荷中和作用。 |
| 英文摘要: |
| 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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