Magnetic removal method for micro-plastics in water environment

• Main Authors: ZHANG RUI, ZHAO JIFEN, NIE YANHE, CHENG GAN, MA JIAO, SHI CHANGLIANG, GENG JINGJUN, WU HAOJIE
• Format: Patent
• Language: Chinese; English
• Published: 05.01.2024
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to the technical field of water treatment, in particular to a method for magnetically removing micro-plastics in a water environment. According to the method, through implementation of three key strengthening technical means, namely preparation of a sepiolite magnetic carrier, parameter optimization of a micro-plastic adsorption process and parameter optimization of a magnetic carrier magnetic separation and removal process, the sepiolite magnetic carrier and the micro-plastic are efficiently adsorbed and combined, and then the sepiolite magnetic carrier and the micro-plastic are rapidly separated from a solution under the action of an external magnetic field. According to the method disclosed by the invention, the removal rate of three typical micro-plastic particles (PE, PS and PVC) in water can be 90% or above. The implementation of the method provided by the invention can provide a solution for the treatment of microplastics in water, and realizes the recycling of environmental waste