Method for adsorbing and rapidly detecting heavy metals in lake water based on magnetic nanoparticles

• Main Authors: YUAN JIAN, LIU JIAPENG, SUN MENGLU, XING CHANGRUI, JIN XUEXUE
• Format: Patent
• Language: Chinese; English
• Published: 17.04.2018
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; TESTING; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a method for adsorbing and rapidly detecting heavy metals in lake water based on magnetic nanoparticles. The maximum adsorption amounts of the prepared magnetic nanoparticles to Cr<6+>, Pb<2+>, Cu<2+> and As<5+> are respectively 160.47mg/g, 75.23mg/g, 1.32mg/g and 2.63mg/g; the balancing time for adsorbing the four heavy metals by the magnetic nanoparticles is 15-20 minutes; and the adsorption rates of Pb<2+> and Cu<2+> reach 90% or above when the pH value is 6-7, the adsorption rate of As<5+> is 99+/-1% when the pH value is 1-7, and the adsorption rate of Cr<6+> is 90+/-1% when the pH value is 2. By combining the advantage that the magnetic nanoparticles are capable of enriching heavy metal lead with the advantage of field fast detection of a colloidal gold test strip, the method is applied to the detection of Pb<2+> in lake water, and compared with traditional instruments, the cost is saved, the method is suitable for site screening, and the development of a quantitative determinatio