Researchers have developed new materials for purifying lead in water

Lead is a kind of metal element with neurotoxicity, which can enter human body through skin, digestive tract and respiratory tract Recently, researchers such as Yu Hongwen and Wang Nana of Northeast Institute of geography of Chinese Academy of sciences have made new progress in the research direction of lead pollution purification in water body, and relevant achievements have been published in the research of industry and engineering chemistry The safe concentration of metal lead to aquatic organisms is 0.16mg/l, and the maximum acceptable concentration of lead in tap water is only 0.05mg/l Therefore, how to effectively remove lead from water and reduce the level of lead pollution is particularly important Using chitosan, a natural polymer material, researchers have successfully developed and prepared xanthogenate thiourea chitosan with sponge structure by a simple and green method, and achieved success in the adsorption and purification of lead in polluted water Chitosan and its source study showed that the material has excellent selective adsorption capacity for lead ions, the saturated adsorption capacity can reach 188.04mg/g, and the removal rate of lead ions can reach more than 90% within one hour for lead containing wastewater with concentration less than 200ppm In addition, due to its three-dimensional structure, it is easy to realize the rapid separation of the material from the wastewater, and it also has good stability, which can be applied to the fixed bed and other water pollution adsorption and purification reaction devices At present, the invention patent has been applied for.