工业水处理 ›› 2025, Vol. 45 ›› Issue (8): 66-75. doi: 10.19965/j.cnki.iwt.2024-0598

• 试验研究 • 上一篇    下一篇

絮凝剂促进金属硫化物沉降及其絮体吸附性能研究

张艳1,2,3(), 袁奥成2,3,4, 洪奇圣1,2,3, 穆景利2,3, 张铭栋2,3()   

  1. 1. 福州大学环境与安全工程学院,福建 福州 350108
    2. 福州海洋研究院,福建 福州 350108
    3. 闽江学院地理与海洋学院,福建 福州 350108
    4. 河北工业大学土木与交通学院,天津 300401
  • 收稿日期:2024-11-04 出版日期:2025-08-20 发布日期:2025-09-25
  • 通讯作者: 张铭栋
  • 作者简介:

    张艳(2000— ),硕士研究生,E-mail:

  • 基金资助:
    国家自然科学基金项目(52200096); 福建省自然科学基金项目(2021J05209); 2023年度福建省促进海洋与渔业产业高质量发展专项资金项目(FJHYF-L-2023-35); 闽江学院发树慈善基金会捐赠资金研究专项重点项目(MFK24007)

Promoting the sedimentation of metal sulfide by flocculants and adsorption performance of the flocs

Yan ZHANG1,2,3(), Aocheng YUAN2,3,4, Qisheng HONG1,2,3, Jingli MU2,3, Mingdong ZHANG2,3()   

  1. 1. School of Environmental and Safety Engineering, Fuzhou University, Fuzhou 350108, China
    2. Fuzhou Institute of Oceanography, Fuzhou 350108, China
    3. School of Geography and Oceanography, Minjiang University, Fuzhou 350108, China
    4. School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China
  • Received:2024-11-04 Online:2025-08-20 Published:2025-09-25
  • Contact: Mingdong ZHANG

摘要:

金属硫化物是一种新兴的高效放射性核素吸附材料,但其自身的粉体性质使其实际应用困难。因此,提出用絮凝方法制备絮体复合材料的新思路。考察了聚合氯化铝(PAC)、阳离子型聚丙烯酰胺(CPAM)、Fe2+、Fe3+对K/Zn/Sn/S金属硫化物(KZTS-NS)悬浊液的絮凝效果,并探究了絮体对Cs+、Sr2+和Co2+的吸附特性。结果表明,当PAC、CPAM、Fe2+、Fe3+投加量分别为10、20、60、20 mg/L时,能显著促进KZTS-NS(0.4 g/L)沉降,所得絮体易固液分离。KZTS-NS/PAC和KZTS-NS/CPAM絮体对Cs+、Sr2+和Co2+的去除率均高于98%;KZTS-NS/Fe2+和KZTS-NS/Fe3+絮体对Cs+的去除率不佳,但对Sr2+和Co2+的去除率在93%以上;絮体吸附机理均为离子交换。

关键词: 放射性废水, 金属硫化物, 复合材料, 絮凝, 沉降性能

Abstract:

Metal sulfide is an emerging and efficient adsorbent for radionuclides, but the powdery property makes it difficult for practical application. Therefore, a new strategy was proposed to prepare floc-like metal sulfide composite by flocculation method. The flocculation performances of polyaluminum chloride (PAC), cationic polyacrylamide (CPAM), Fe2+, and Fe3+ for K/Zn/Sn/S metal sulfide (KZTS-NS) suspensions, as well as the adsorption properties of the resultant flocs toward Cs+, Sr2+, and Co2+, were investigated. The results showed that PAC, CPAM, Fe2+, and Fe3+ could significantly promote the sedimentation of KZTS-NS (0.4 g/L) when the dosages were 10, 20, 60 and 20 mg/L, respectively. The resultant flocs could be easily separated from the liquid. The removal rates of Cs+, Sr2+ and Co2+ by the flocs of KZTS-NS/PAC and KZTS-NS/CPAM were higher than 98%. The flocs of KZTS-NS/Fe2+ and KZTS-NS/Fe3+ showed poor adsorption capacity for Cs+ but good adsorption performance for Sr2+ and Co2+ with removal rates exceeding 93%. For all the flocs, the adsorption mechanism was ion exchange.

Key words: radioactive wastewater, metal sulfide, composite material, flocculation, sedimentation performance

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