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将橘子皮经氢氧化钠和氯化钙处理,得到改性橘子皮生物吸附剂(SCOP)。用红外光谱(IR)、扫描电镜(SEM)和N2-吸附法对其形貌和特性进行表征;通过静态吸附实验,研究pH、起始金属离子浓度等因素对改性橘子皮SCOP吸附Cu2+、Pb2+和Zn2+的影响。等温吸附结果表明,SCOP对Cu2+、Pb2+和Zn2+的吸附符合Langmuir方程,根据Langmuir方程计算的SCOP对Cu2+、Pb2+和Zn2+的饱和吸附量分别为70.73,209.8和56.18mg/g。根据静态吸附实验结果,用动态柱吸附实现了水溶液中Pb2+和Zn2+的分离。吸附过程中离子交换发生了重要作用,重金属离子与吸附剂中的Ca2+离子发生离子交换。
The orange peel was treated with sodium hydroxide and calcium chloride to obtain a modified orange peel biological adsorbent (SCOP). Morphology and properties were characterized by infrared spectroscopy (IR), scanning electron microscopy (SEM) and N2-adsorption method. Cu2 + was adsorbed on the modified orange peel SCOP through static adsorption experiments, pH and initial metal ion concentration. Pb2 + and Zn2 +. The results of isothermal adsorption show that the adsorption of Cu2 +, Pb2 + and Zn2 + in SCOP accords with the Langmuir equation. The saturated adsorption capacities of Cu2 +, Pb2 + and Zn2 + by SCOP calculated by Langmuir equation are 70.73, 209.8 and 56.18mg / g, respectively. According to the results of static adsorption experiments, the separation of Pb2 + and Zn2 + in aqueous solution was achieved by dynamic column adsorption. Ion exchange has an important role in the adsorption process, heavy metal ions and adsorbents Ca2 + ion exchange occurs.