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通过环氧氯丙烷交联及多胺改性的方法,制备得到新型交联腐殖酸CHA。利用FTIR对其结构进行了表征,并重点考察了吸附温度等不同因素对CHA吸附水体中铅离子性能的影响。结果表明,交联腐殖酸CHA对水体中铅离子具有优异的吸附性能,平衡吸附容量可达到219.3mg/g,远高于常规高温焙烧方法制得腐殖酸的吸附性能。CHA的吸附性能随反应温度、溶液pH的升高而增大,其吸附过程符合Langmuir吸附方程。
A new cross-linked humic acid CHA was prepared by epichlorohydrin crosslinking and polyamine modification. Its structure was characterized by FTIR, and the effects of different factors such as adsorption temperature on the performance of Pb (superscript 2 +) in water adsorbed by CHA were investigated. The results show that the cross-linked humic acid CHA has excellent adsorption capacity for Pb2 + in water. The equilibrium adsorption capacity can reach 219.3mg / g, which is much higher than that of the conventional high-temperature roasting method. The adsorption capacity of CHA increases with the increase of reaction temperature and pH, and the adsorption process accords with the Langmuir adsorption equation.