Efficient adsorption/reduction of aqueous hexavalent chromium using oligoaniline hollow microspheres fabricated by a template‐free method

Bao Chongzhuo; Mingxin Chen; Liu Guangrong; Jin Xin; Huang Qiang

摘要

Abstract <section xml:id="jctb5473-sec-0001" numbered="no"> <title type="main">BACKGROUND >Uniform and well‐dispersed hollow microspheres of oligoaniline were synthesized by a facile and template‐free method in alkaline medium. The morphology of oligoanilines was controlled from hollow to hard microspheres, by simply changing the volumes of alkaline medium. SEM, TEM, XRD, FTIR and physical adsorption of nitrogen were used to characterize the products. Hexavalent chromium ion uptake experiments were run with these aniline oligomers. </section> <section xml:id="jctb5473-sec-0002" numbered="no"> <title type="main">RESULTS > Adsorption experiments showed that the removal of chromium ions was strongly dependent on the initial pH of the solution. The pseudo‐second‐order kinetic and Langmuir isotherm models were well correlated with the experimental data. The adsorption of Cr(VI) and synergistic reduction to Cr(III) were confirmed by analyzing remnant chromium in the liquid and XPS detection of the exhausted adsorbent. A redox/pseudo‐protonation process was suggested as the mechanism to explain the Cr(VI) removal. The adsorbed chromium ions could be desorbed by NaOH solution. The higher desorption efficiency of 96.2% was achieved by using 1.0 mol L ‐1 NaOH as the desorption agent. </section> <section xml:id="jctb5473-sec-0003" numbered="no"> <title type="main">CONCLUSIONS > It was observed that the hollow microsphere were the most effective adsorbent of the three adsorbents and its removal efficiency reached 99% to remove 60 mg L ‐1 Cr(VI). The facile fabrication, efficient removal of Cr(VI) and simple regeneration offered an opti </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract XMLNS =“http://www.wiley.com/namespaces/wiley”type =“main”xml：lang =“en”> <title type =“main”>抽象</ title> <section XML：ID =“JCTB5473-SEC-0001”编号=“否”> <标题类型=“MAIN”>背景</标题> <P>通过容易和无模板的方法合成寡替苯胺的均匀和分散的中空微球碱性介质。通过简单地改变碱性介质的体积，将寡替苯胺的形态从中空控制到硬微球。 SEM，TEM，XRD，FTIR和氮的物理吸附用于表征产品。用这些苯胺低聚物运行六价铬离子吸收实验。</ p> </ section> <章节XML：ID =“JCTB5473-SEC-0002”编号=“否”> <标题类型=“main”>结果</标题> >吸附实验表明，铬离子的除去强烈依赖于溶液的初始pH。伪二阶动力学和Langmuir等温模型与实验数据很好。通过分析液体中的残余铬和XPS检测到排气吸附剂的残留铬来确认Cr（VI）和协同还原对Cr（III）的吸附。建议氧化还原/伪质量过程作为解释Cr（VI）去除的机制。吸附的铬离子可以通过NaOH溶液解吸。通过使用1.0mol L -1 / sup> NaOH作为解吸剂，实现了96.2％的较高解吸效率。 </ p> </ section> <部分XML：ID =“JCTB5473-SEC-0003”编号=“否”> <标题类型=“main”>结论</标题> >它被观察到中空微球是三种吸附剂中最有效的吸附剂，其去除效率达到99％，以除去60mg L <SUP> -1 / SOP> Cr（VI）。面部的制造，高效除去Cr（VI）和简单的再生提供了Opti </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-33908/'>《Journal of Chemical Technology & Biotechnology》</a> <b style="margin: 0 2px;">|</b><span>2018年第4期</span><b style="margin: 0 2px;">|</b><span>共12页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Bao Chongzhuo&option=202" target="_blank" rel="nofollow">Bao Chongzhuo;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Mingxin Chen&option=202" target="_blank" rel="nofollow">Mingxin Chen;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Guangrong&option=202" target="_blank" rel="nofollow">Liu Guangrong;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Jin Xin&option=202" target="_blank" rel="nofollow">Jin Xin;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Huang Qiang&option=202" target="_blank" rel="nofollow">Huang Qiang;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>School of Materials Science and EngineeringYunnan UniversityKunming PR China;</p> <p>School of Materials Science and EngineeringYunnan UniversityKunming PR China;</p> <p>School of Materials Science and EngineeringYunnan UniversityKunming PR China;</p> <p>School of Materials Science and EngineeringYunnan UniversityKunming PR China;</p> <p>School of Materials Science and EngineeringYunnan UniversityKunming PR China;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/180.html" title="生物工程学（生物技术）">生物工程学（生物技术）;</a><a href="https://www.zhangqiaokeyan.com/clc/20827.html" title="生物化学过程">生物化学过程;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=adsorption&option=203" rel="nofollow">adsorption;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=reduction&option=203" rel="nofollow">reduction;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=hexavalent chromium&option=203" rel="nofollow">hexavalent chromium;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=oligoaniline&option=203" rel="nofollow">oligoaniline;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=hollow microsphere&option=203" rel="nofollow">hollow microsphere;</a> </p> <div class="translation"> 机译：吸附;还原;六价铬;寡替尼;中空微球; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" 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