Considering the urgency of removing hazardous radioactive Cs-137, Cs+ adsorption and environmental re mediation from aqueous solutions has been given widespread concern. Composite materials (CMs) have recently emerged with good potential application in Cs+ adsorption. Herein, recent developments in the field of Cs+ adsorption covering the synthesis and performance of composite materials are reviewed. This is followed by a preliminary summary for composite materials and their further prospects in Cs+ adsorption. Based on the scope of the core and supporting materials, composite materials are classified into several categories. Along this line, the representative composite materials are introduced in view of synthesis methods and adsorption performance. Moreover, some emerging novel materials are also briefly described. Overall, this review intends to provide a preliminary database for composite materials and further guide the exploration and design of more composite materials with excellent adsorption performance in respective fields of radioactive contamination, wastewater treatment and radioisotope recycling.

Considering the urgency of removing hazardous radioactive Cs-137, Cs+ adsorption and environmental re mediation from aqueous solutions has been given widespread concern. Composite materials (CMs) have recently emerged with good potential application in Cs+ adsorption. Herein, recent developments in the field of Cs+ adsorption covering the synthesis and performance of composite materials are reviewed. This is followed by a preliminary summary for composite materials and their further prospects in Cs+ adsorption. Based on the scope of the core and supporting materials, composite materials are classified into several categories. Along this line, the representative composite materials are introduced in view of synthesis methods and adsorption performance. Moreover, some emerging novel materials are also briefly described. Overall, this review intends to provide a preliminary database for composite materials and further guide the exploration and design of more composite materials with excellent adsorption performance in respective fields of radioactive contamination, wastewater treatment and radioisotope recycling.

In order to obtain a well understanding of the toxicity and ecological effects of trace elements in the environment, it is necessary to determine not only the total amount, but also their existing species. Speciation analysis has become increasingly important in making risk assessments of toxic elements since the toxicity and bioavailability strongly depend on their chemical forms. Effective separation of different species in combination with highly sensitive detectors to quantify these particular species is indispensable to meet this requirement. In this paper, we present the recent progresses on the speciation analysis of trace arsenic, mercury, selenium and antimony in environmental and biological samples with an emphasis on the separation and detection techniques, especially the recent applications of high performance liquid chromatography (HPLC) hyphenated to atomic spectrometry or mass spectrometry.