摘要
近年来,国家对生态文明建设的重视程度持续提升。当前,清洁水资源短缺与水污染危机已成为人类面临的最严峻挑战之一,其中,铬(VI)作为毒性极强的典型水体污染物,其高效去除是环境治理领域的关键课题。本实验以提升水体中Cr(VI)的吸附效能为核心目标,开展纳米四氧化三铁基复合吸附剂的制备与改性研究。实验首先采用聚丙烯酸(PAA)对纳米Fe_(3)O_(4)进行表面修饰,成功制备PAA/Fe_(3)O_(4)复合吸附剂;针对纳米颗粒易团聚的共性问题,进一步利用硅烷偶联剂KH-570进行二次改性,合成出PAA/Fe_(3)O_(4)@KH-570复合材料。为验证材料制备与改性效果,通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)、透射电子显微镜(TEM)等多种表征手段进行系统分析,结果证实PAA已成功复合于纳米Fe_(3)O_(4)表面,且KH-570的改性处理有效可行。吸附性能测试实验表明,经KH-570改性后的复合材料分散性显著改善,其对Cr(VI)的吸附性能较未改性的PAA/Fe_(3)O_(4)提升约10%。本研究不仅开发出一种具有潜在应用价值的含铬废水处理吸附材料,其设计的“材料制备-改性优化-表征验证-性能测试”完整实验体系,还可有效培养学生的创新思维与实践能力,为资源循环利用及环境治理领域的人才培养与技术创新提供有力支撑。
In recent years,China has continuously elevated its emphasis on ecological civilization construction.Currently,the shortage of clean water resources and water pollution crises have become among the most severe challenges facing humanity.Among these,chromium(Ⅵ)is a typical water pollutant with extremely high toxicity,its efficient removal is a key issue in the field of environmental governance.With the core objective of enhancing the adsorption efficiency of Cr(Ⅵ)in water,the preparation and modification of nano-Fe_(3)O_(4)-based composite adsorbents were conducted.polyacrylic acid(PAA)for the surface modification of nano-Fe_(3)O_(4)was adopted,successfully preparing the PAA/Fe_(3)O_(4)composite adsorbent.To address the common problem of easy agglomeration of nanoparticles,a secondary modification was further carried out using the silane coupling agent KH-570,leading to the synthesis of PAA/Fe_(3)O_(4)@KH-570 composite material.To verify the effectiveness of material preparation and modification,systematic analysis was performed using multiple characterization techniques including X-ray Diffraction(XRD)Fourier Transform Infrared Spectroscopy(FTIR),X-ray Photoelectron Spectroscopy(XPS)and Transmission Electron Microscopy(TEM).The results confirmed that PAA was successfully compounded on the surface of nano-Fe_(3)O_(4),and the modification treatment with KH-570 was effective and feasible.Adsorption performance tests showed that the dispersibility of the composite material modified by KH-570 was significantly improved,and its adsorption capacity for Cr(Ⅵ)was enhanced by approximately 10%compared with the unmodified PAA/Fe_(3)O_(4).This study not only developed an adsorbent material with potential application value for chromium-containing wastewater treatment but also designed a complete experimental system covering"material preparation-modification optimization-characterization verification-performance testing".This system can effectively cultivate students′innovative thinking and practical abilities,providing strong support for talent cultivation and technological innovation in the fields of resource recycling and environmental governance.
作者
魏新芳
钟瑞霞
郝闻达
刘易润
刘易若
王海旺
WEI Xinfang;ZHONG Ruixia;HAO Wenda;LIU Yirun;LIU Yiruo;WANG Haiwang(Qinhuangdao Campus of Northeastern University,Hebei Qinhuangdao 066004,China)
出处
《广州化工》
2026年第2期198-201,212,共5页
GuangZhou Chemical Industry
基金
2023年东北大学秦皇岛分校教学研究与改革(2023JG-B05)
2022-2023年度河北省高等教育教学改革研究与实践项目(2022GJJG434)。
关键词
六价铬Cr(VI)
纳米四氧化三铁
吸附
复合吸附剂
KH-570
Cr(Ⅵ)removal
magnetic nano-Fe_(3)O_(4)
adsorption performance
polyacrylic acid(PAA)composite
silane coupling agent KH-570
