%0 Journal Article
%T Desorption Behaviors of 4-nitrophenol on Hyper-Cross-Linked Polymer Resin NDA-701<br>对硝基酚在超高交联吸附树脂NDA-701上的脱附行为研究
%A HONG Chang-hong
%A HUANG Ben-sheng
%A QIU Jing
%A ZHANG Wei-ming
%A <br>洪昌红
%A 黄本胜
%A 邱静
%A 张炜铭
%J 环境科学
%D 2011
%I 
%X Desorption behaviors of loaded 4-nitrophenol (4-NP) on hyper-cross-linked polymer resin NDA-701 were studied. The molar ratio of NaOH and 4-NP desorbed (MNaOH/4-NP) selection experiments were carried out at two different reaction temperature(303 K and 333 K). Desorption kinetics characteristic of 4-NP on NDA-701 in the batch and fixed-bed mode were examined at different reaction temperature and MNaOH/4-NP values. The results showed that optimal MNaOH/4-NP values were 1.2 and 100% 4-NP could be desorbed from NDA-701 at two different temperature. When the MNaOH/4-NP was lower than 1.2,the desorption efficiency increases with the increase of temperature,but the function of temperature decrease with increasing of MNaOH/4-NP values for desorption ratio. The information indicated that desorption thermodynamic characteristic of NDA-701 was controlled by MNaOH/4-NP values. Desorption kinetics in the alkaline system can be well described by pseudo-second-order kinetic model,and desorption rate is increased with the increase of desorption temperatures,the k2 value increase from 0.010 g·(mmol·min)-1 to 0.035 g·(mmol·min)-1 when desorption temperature increase from 303 K to 333 K. Nevertheless,higher MNaOH/4-NP values could not promote desorption rate if only MNaOH/4-NP value was larger than the optimal molar ratio of NaOH and 4-NP. When MNaOH/4-NP values increase from 1.2 to 5.0,the k2 value increase from 0.038 g·(mmol·min)-1 to 0.044 g·(mmol·min)-1 merely at 333 K. the results indicated that desorption kinetic characteristic of NDA-701 was controlled by temperature. NDA-701 can be completely recovered using 2 times Bed Volume of 2% NaOH solution at the temperature of 333 K,comparing with field application,implying that more energy and cost can be saved in comparison with the actual desorption process in the industry.
%K 4-nitrophenol
%K desorption
%K desorption kinetics
%K fixed-bed desorption
%K hyper-cross-linked polymer resin<br>对硝基酚
%K 脱附
%K 脱附动力学
%K 固定床脱附
%K 超高交联吸附树脂
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=72A069EB4060E98CF106976B1CC02BFE&yid=9377ED8094509821&vid=9971A5E270697F23&iid=94C357A881DFC066&sid=77586D59F496BF38&eid=532CB3FA5DC08D32&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=0