IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v15y2018i9p1863-d166265.html
   My bibliography  Save this article

Hydrothermal Treatment of Arsenic Sulfide Residues from Arsenic-Bearing Acid Wastewater

Author

Listed:
  • Liwei Yao

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China)

  • Xiaobo Min

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China
    Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China)

  • Hui Xu

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China)

  • Yong Ke

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China
    Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China)

  • Yanjie Liang

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China
    Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China)

  • Kang Yang

    (School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China)

Abstract

Arsenic sulfide residue (ASR), a by-product from the treatment of arsenic-bearing acidic wastewater, is abundantly generated but not properly disposed of in China. The utilization of such high-content arsenic waste residue is limited by the market. The traditional methods of stabilization/solidification (S/S) by lime cement or iron salt have a large mass/volume addition, high dumping cost and secondary pollution risk. In this paper, hydrothermal technology was used to treat three kinds of ASRs obtained from different smelters to minimize waste. The leaching toxicity and chemical speciation of the generated products was also evaluated by TCLP and BCR analyses. It was found that the hydrothermal treatment could greatly reduce the volume and moisture content of the ASRs. TCLP tests showed that the leachability of arsenic and heavy metals significantly decreased after the treatment. According to the BCR analysis, most of the unstable As, Cd and Cr transformed into a residual fraction. Finally, XRD, SEM, Raman and XPS techniques were carried out to reveal the mechanism. As a result, hydrothermal treatment can efficiently achieve the dehydration, volume reduction and stabilization/solidification of ASRs.

Suggested Citation

  • Liwei Yao & Xiaobo Min & Hui Xu & Yong Ke & Yanjie Liang & Kang Yang, 2018. "Hydrothermal Treatment of Arsenic Sulfide Residues from Arsenic-Bearing Acid Wastewater," IJERPH, MDPI, vol. 15(9), pages 1-15, August.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:9:p:1863-:d:166265
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/15/9/1863/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1660-4601/15/9/1863/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. De-Gang Liu & Yong Ke & Xiao-Bo Min & Yan-Jie Liang & Zhong-Bing Wang & Yuan-Cheng Li & Jiang-Chi Fei & Li-Wei Yao & Hui Xu & Guang-Hua Jiang, 2019. "Cotreatment of MSWI Fly Ash and Granulated Lead Smelting Slag Using a Geopolymer System," IJERPH, MDPI, vol. 16(1), pages 1-12, January.

    More about this item

    Keywords

    ;
    ;
    ;
    ;
    ;
    ;

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jijerp:v:15:y:2018:i:9:p:1863-:d:166265. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.