摘要：
采用氢氧化钠-异丙醇对松树叶进行化学改性,同时将改性松树叶用于对Cr(Ⅵ)的吸附实验。通过单因素实验,考察了处理条件对Cr(Ⅵ)吸附效果的影响。结果表明,对50 mL质量浓度为10.0 mg/L的Cr(Ⅵ)溶液,在溶液pH=3.0,投加改性松树叶0.2 g,温度30℃,接触时间90 min的条件下,Cr(Ⅵ)的去除率可达82%以上。改性松树叶在20～30℃对Cr(Ⅵ)的吸附是吸热过程,以离子交换吸附为主,吸附过程遵循Freundlich吸附等温线。
关键词:
改性松树叶,
吸附,
Cr(Ⅵ)
Abstract:
The pine needles have been modified synchronously with the solution of sodium hydroxide-isopropanol.Then,the modified pine needles are used for adsorbing chromium(Ⅵ).The effects of treating conditions on adsorbing efficiency are studied through single-factor tests.The results show that when pH=3.0,the dosage of modified pine needles 0.2 g,temperature 30 ℃,and contact time 90 min,the Cr(Ⅵ) removing rate for 50 mL of Cr(Ⅵ)solution,whose mass concentration is 10.0 mg/L,reaches above 82%.The adsorption of Cr(Ⅵ) by modified pine needles at 20 ℃ to 30 ℃ is an endothermic process.It is mainly ion exchange adsorption.The adsorbing process follows the Freundlich adsorption isotherm.
Key words:
modifying pine needles,
adsorption,
Chromium(VI)
中图分类号:
杜婷,戴友芝,贾明畅,王辉,郭丽丽. 改性松树叶对六价铬的去除研究[J]. 工业水处理, 2011, 31(12): 39-42.
Du Ting,Dai Youzhi,Jia Mingchang,Wang Hui,Guo Lili. Research on the removal of chromium(VI)with modified pine needles[J]. INDUSTRIAL WATER TREATMENT, 2011, 31(12): 39-42.