摘要
采用高能球磨法制备了一系列硝酸掺杂的钛精矿(nitric acid-modified titanium ore,NATO)吸附材料,采用正交表L9(34)安排实验,以甲基橙(MO)溶液的脱色率作为衡量吸附剂优劣的重要判据.以硝酸掺杂比例、煅烧温度、保温时间、升温速率为因素进行正交试验,基于降低能耗和成本的考虑和综合分析的基础上,得到制备NATO吸附剂的最优工艺条件:硝酸掺杂比例为2.0%,煅烧温度为300℃,保温时间为3 h,升温速率为10℃/min.在较优工艺条件下制备的NATO吸附剂对甲基橙的脱色率达到96.8%,明显优于未掺杂样品,且沉降性能较好,易于分离,是一类有应用前景的吸附材料.
Nitric acid-modified titanium ore （NATO） sorbents were prepared by high energy ball milling process. The adsorption properties of NATO sorbents were evaluated by the decoloration efficiency of methyl orange （MO） under dark-state absorption. In the adsorption stage, L9（34） orthogonal experiments of different factors, for example, doping ratio, calcination temperature, soaking time and heating rate were performed. Based on the orthogonal experiments, the optimal operating parameters, 2.0wt % nitric acid, 300 ℃ calcination temperature, 3 h soaking time, and 10 ℃/min heating rate, are obtained. In this optimal condition, the decoloration efficiency of MO reaches 96.8 %, which is significantly better than the undoped samples. Thus, it is feasible to treat dye wastewater by these NATO sorbents.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第7期992-994,999,共4页
Journal of Northeastern University(Natural Science)
基金
国家重点基础研究发展计划项目(2007CB613504)
教育部重大科技支撑计划项目(307009)
中央高校基本科研业务费专项资金资助项目(N110423003)
河北省自然科学基金-钢铁联合研究基金资助项目(E2012501012)
关键词
硝酸掺杂
钛精矿
脱色率
甲基橙
正交试验
nitric acid-modified
titanium ore
decoloration efficiency
methyl orange
orthogonal test
