集“还原-吸附”于一体的磁性纳米吸附剂的制备及其对制革废水中六价铬的吸附研究
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- 英文论文题名：Chromium(Ⅵ) reduction and removal from tannery effluents by using magnetic nanoadsorbents
- 论文作者：官小玉 ; 严孙贤 ; 常金明 ; 陈意 ; 范浩军
- 英文论文作者：GUAN Xiao-yu ; YAN Sun-xian ; CHANG Jin-ming ; CHEN Yi ; FAN Hao-jun ; National Engineering Laboratory for Clean Technology of Leather Manufacture ; Sichuan University
- 年：2016
- 作者机构：制革清洁技术国家工程实验室(四川大学);
- 论文关键词：磁性纳米吸附剂 ; 六价铬 ; 没食子酸 ; 还原-吸附
- 英文论文关键词：magnetic nanoadsorbent ; chromium(VI) ; gallic acid ; reduction-adsorption
- 会议召开时间：2016-07-27
- 会议录名称：2016第十一届全国皮革化学品学术交流会暨中国皮革协会技术委员会第21届年会摘要集
- 英文会议录名称：Abstracts of 2016 the 11th National Conference on Leather Chemicals & 21st Annual Convention of China Leather Science and Technology Commission
- 语种：中文
- 分类号：TQ424;X794
- 学会代码：ZGHG
- 会议名称：2016第十一届全国皮革化学品学术交流会暨中国皮革协会技术委员会第21届年会
- 会议地点：中国山东济南
- 主办单位：中国皮革协会技术委员会、中国皮革协会皮革化工专业委员会、中国化工学会精细化工专业委员会
- 学会名称：中国化工学会
- 页数：1
- 文件大小：62k
- 原文格式：O
- 会议级别：全国
摘要
利用I-乙基-3-(3-二甲基氨丙基)-碳化二亚胺/N-羟基琥珀酰亚胺(EDC/NHS)技术将没食子酸(GA)共价固定于Fe_3O_4表面,制备了一种集"还原-吸附"于一体的磁性纳米吸附剂(GA@AMEO@SiO_2@Fe_3O_4),并用于制革废水中六价铬的治理。研究采用多种检测手段对GA@AMEO@SiO_2@Fe_3O_4进行了表征,同时较为系统地研究其对六价铬的"还原-吸附"性能。实验结果表明,当溶液的pH范围为3-10时,GA中的酚羟基部分解离,对溶液中的六价铬具有先还原后吸附的能力;将GA@AMEO@SiO_2@Fe_3O_4直接应用于含六价铬制革废水治理,尽管废水成分复杂,但其对六价铬的还原-吸附百分率接近于100%,并且在磁场作用下,能将其从废水中快速、彻底回收。
In the present study,a magnetic nanoadsorbent(GA@AMEO@SiO_2@Fe_3O_4),with the ccapbilities of reduction and adsorption,was prepared by conjugating gallic acid onto he surface of engineered iron oxide nanoparticles thtough 1-ethyl-3-(3-dimethylaminepropyl) carbodiimide hydrochloride/N-hydroxysuccinimide(EDC/NHS) method,and was used in treatment of chromium(Ⅵ) in tanning wastewaterwith.The synthesized nanoadsorbent was characterized by multiple techniques and its chromium(Ⅵ) reduction-adsorption potency was investigated systematically.The results showed that the chromium(Ⅵ) reduction and adsorption capacity were pH dependent,ranging from 3 to 10.Finally,it was found that chromium(Ⅵ) reduction and removal percentage from real tannery effluents by GA@AMEO@SiO_2@Fe_3O_4 approximated 100%,and the exhausted nanoadsorbent could be separated rapidly from the effluents via a simple magnetic process.According to these results,we intend to offer an efficient and separable magnetic nanoadsorbent that may detoxify chromium(Ⅵ) first and then remove it from tannery effluents.
In the present study,a magnetic nanoadsorbent(GA@AMEO@SiO_2@Fe_3O_4),with the ccapbilities of reduction and adsorption,was prepared by conjugating gallic acid onto he surface of engineered iron oxide nanoparticles thtough 1-ethyl-3-(3-dimethylaminepropyl) carbodiimide hydrochloride/N-hydroxysuccinimide(EDC/NHS) method,and was used in treatment of chromium(Ⅵ) in tanning wastewaterwith.The synthesized nanoadsorbent was characterized by multiple techniques and its chromium(Ⅵ) reduction-adsorption potency was investigated systematically.The results showed that the chromium(Ⅵ) reduction and adsorption capacity were pH dependent,ranging from 3 to 10.Finally,it was found that chromium(Ⅵ) reduction and removal percentage from real tannery effluents by GA@AMEO@SiO_2@Fe_3O_4 approximated 100%,and the exhausted nanoadsorbent could be separated rapidly from the effluents via a simple magnetic process.According to these results,we intend to offer an efficient and separable magnetic nanoadsorbent that may detoxify chromium(Ⅵ) first and then remove it from tannery effluents.
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