PREPARATION OF MERCAPTOACETYL CORN STRAW, A Cd(Ⅱ) ADSORBENT
-
摘要: 以玉米秸秆(CS)、巯基乙酸(TGA)为原料,通过化学反应制备出重金属吸附剂——巯基乙酰化玉米秸秆(MACS),考察MACS对水样中Cd (Ⅱ)的去除性能,采用单因素实验法对MACS的制备条件进行优化研究。结果表明,MACS的优化制备条件为:CS粒径为0.20 mm (80目),m(催化剂NHS):m(EDC·HCl)为0.5:1,m(CS):V(TGA)为1:5,反应介质pH值为5.0,反应温度25℃,反应时间2 h。在此条件下制备的MACS对水样中Cd (Ⅱ)的吸附效率可达到61.57%。红外分析表明,CS分子链中成功引入了巯基。Abstract: A novel heavy metal adsorbent, mercaptoacetyl corn straw (MACS), was prepared by chemical reaction with corn straw and mercaptoacetic acid (TGA). The removal performance of Cd(Ⅱ) in water aqueous with MACS was taken as the main indicator, and the preparation conditions of MACS were investigated by single factor experiments. The result showed that the optimum preparation condition for MACS was as follows: the size of corn straw was 0.2 mm (through 80-mesh screen), the mass ratio of NHS and EDC·HCl was 0.5:1, the ratio of CS and TGA (g:mL) was 1:5, pH value in reaction medium was 5.0, the reaction temperature was 25 ℃ and the reaction time was 2 h. Under that, the highest removal rate of Cd(Ⅱ) could reached 61.57%. FTIR analysis results revealed that the mercapto groups were successfully grafted onto the molecular chains of CS.
-
Key words:
- corn straw /
- adsorbent /
- single factor experiment /
- cadmium containing wastewater
-
常艳丽. 含镉废水处理技术研究进展[J]. 净水技术, 2013, 32(3):1-4. 刘金燕, 刘立华, 薛建荣, 等. 重金属废水吸附处理的研究进展[J]. 环境化学, 2018, 37(9):2016-2024. PURKAYASTHA D, MISHRA U, BISWAS S. A comprehensive review on Cd(Ⅱ) removal from aqueous solution[J]. Journal of Water Process Engineering, 2014, 2:105-128. 邓景衡, 余侃萍, 肖国光, 等. 吸附法处理重金属废水研究进展[J]. 工业水处理, 2014, 34(11):4-7. 邹照华, 何素芳, 韩彩芸, 等. 重金属废水处理技术研究进展[J]. 工业水处理, 2010, 30(5):9-12. 马丽丽, 解庆林, 陈南春, 等. 锰氧化物改性硅藻土对水中Cd(Ⅱ)的吸附性能研究[J]. 环境工程, 2017, 35(6):59-64. VAFAKHAH S, BAHROLOLOOM M E, BAZARGANLARI R, et al. Removal of copper ions from electroplating effluent solutions with native corn cob and corn stalk and chemically modified corn stalk[J]. Journal of Environmental Chemical Engineering, 2014, 2(1):356-361. 李荣华, 岳庆玲, 杨亚提, 等. 巯基改性玉米秸秆吸附Hg(Ⅱ)的热力学特征研究[J]. 环境科学学报, 2012, 32(10):2435-2442. 李青竹, 覃文庆, 柴立元, 等. 巯基化改性麦糟对Zn(Ⅱ)的吸附特性[J]. 中国有色金属学报, 2014, 24(4):1076-1083. 邓华, 严发, 陆志诚, 等. 巯基改性木薯秸秆对Cd(Ⅱ)吸附性能的研究[J]. 水处理技术, 2018, 44(6):57-61. 訾俊峰. 对甲基苯磺酸催化合成乙酸仲丁酯[J]. 许昌学院学报, 2010, 29(5):89-91. 王进喜, 常青, 王亚军. 一种改性高分子絮凝剂的制备[J]. 环境工程, 2014, 32(5):45-48. AKHSHABI S, BIAZAR E, SINGH V, et al. The effect of the carbodiimide cross-linker on the structural and biocompatibility properties of collagen-chondroitin sulfate electrospun mat[J]. International Journal of Nanomedicine, 2018, 13:4405-4416. 张薇薇, 杨雅丽, 樊景春, 等. EDC/NHS交联剂在新型生物材料磁小体修饰中的应用[J]. 甘肃中医药大学学报, 2019, 36(1):1-5. 张毅, 张转玲, 张昊, 等. 氨基酸改性壳聚糖基金属离子吸附材料的制备和性能[J]. 材料研究学报, 2016, 30(11):825-833. 朱寿进, 刘法谦, 王璟朝, 等. 新型羧甲基壳聚糖水凝胶的合成与表征[J]. 高等学校化学学报, 2014, 35(4):863-868. 陈理想, 吴平霄, 杨林, 等. 巯基乙胺改性蛭石对水体中Ag(Ⅰ)的吸附性能研究[J]. 中国环境科学, 2015, 35(4):1109-1115. 卢涌泉, 邓振华. 实用红外光谱解析[M]. 北京:电子工业出版社, 1989. CHAI L Y, LI Q Z, ZHU Y H, et al. Synthesis of thiol-functionalized spent grain as a novel adsorbent for divalent metal ions[J]. Bioresource Technology, 2010, 101(15):6269-6272. 王刚, 管映兵, 马小芳, 等. 改性聚乙烯亚胺处理低浓度含锰废水[J]. 给水排水, 2017, 53(10):72-75.
点击查看大图
计量
- 文章访问数: 108
- HTML全文浏览量: 8
- PDF下载量: 4
- 被引次数: 0