TY - JOUR
T1 - Adsorptive removal of trace thallium(I) from wastewater
T2 - A review and new perspectives
AU - Zhao, Zhuo
AU - Xiong, Yanhang
AU - Cheng, Xiankun
AU - Hou, Xue
AU - Yang, Yongxiang
AU - Tian, Yongpan
AU - You, Jinglin
AU - Xu, Liang
PY - 2020
Y1 - 2020
N2 - Thallium is an emerging pollutant reported in wastewater along with the increasing mining and smelting of thallium-containing ores in recent years. The complete removal of Tl(I) from wastewater is of significant emergency due to its high toxicity and mobility, however, Tl(I) removal is always confronted with numerous technical difficulties because of the extremely low Tl(I) concentration in wastewater and the disturbances of many accompanying impurity ions. Adsorption is currently the most widely used method for Tl(I) removal on industrial scale and varied kinds of adsorbents such as Prussian blue analogues, biosorbents, and metal oxides have been developed. However, the adsorption process of Tl(I) is always affected by the co-existing cations, resulting in low Tl(I) removal efficiency. Recently, the development of a variety of novel adsorbents or ion sensors based on macrocyclic compounds for enrichment and accurate determination of trace Tl(I) in aqueous solutions exhibits great potential for application in Tl(I) removal from wastewater with high selectivity and process efficiency. This paper provides an overview of the adsorption methods for Tl(I) removal from wastewater with emphasis on complexation properties between varied types of adsorbents and Tl(I). Future directions of research and development of adsorptive Tl(I) removal from industrial wastewater are proposed.
AB - Thallium is an emerging pollutant reported in wastewater along with the increasing mining and smelting of thallium-containing ores in recent years. The complete removal of Tl(I) from wastewater is of significant emergency due to its high toxicity and mobility, however, Tl(I) removal is always confronted with numerous technical difficulties because of the extremely low Tl(I) concentration in wastewater and the disturbances of many accompanying impurity ions. Adsorption is currently the most widely used method for Tl(I) removal on industrial scale and varied kinds of adsorbents such as Prussian blue analogues, biosorbents, and metal oxides have been developed. However, the adsorption process of Tl(I) is always affected by the co-existing cations, resulting in low Tl(I) removal efficiency. Recently, the development of a variety of novel adsorbents or ion sensors based on macrocyclic compounds for enrichment and accurate determination of trace Tl(I) in aqueous solutions exhibits great potential for application in Tl(I) removal from wastewater with high selectivity and process efficiency. This paper provides an overview of the adsorption methods for Tl(I) removal from wastewater with emphasis on complexation properties between varied types of adsorbents and Tl(I). Future directions of research and development of adsorptive Tl(I) removal from industrial wastewater are proposed.
KW - Adsorption
KW - Macrocyclic compounds
KW - Technology overview
KW - Thallium removal
KW - Wastewater
UR - http://www.scopus.com/inward/record.url?scp=85080026543&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2020.122378
DO - 10.1016/j.jhazmat.2020.122378
M3 - Review article
AN - SCOPUS:85080026543
SN - 0304-3894
VL - 393
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 122378
ER -