Abstract Graphene oxide hydrosol was added dropwise to the surface of chitosan (CS) to successfully obtain graphene oxide/chitosan composite (GC). The composite material was characterized by scanning electron microscopy and X-ray diffraction. The prepared adsorbent was used to simulate the static adsorption of copper, lead, and cadmium ions from 100 mL of 50 mg/L simulated wastewater samples. When the pH of the simulated wastewater is 6, initial dosage is 70 mg, adsorption time is 90 min, and temperature is 20°C; the adsorption capacities for copper, lead, and cadmium are 60.7, 48.7, and 32.3 mg/g, respectively. The adsorption and desorption cycle experiments show that the adsorption capacity of GC for copper ions can reach 86% of the initial adsorption capacity after ten cycles. The adsorption of lead ions on the composite conforms to the Freundlich adsorption isotherm model.

中文翻译：

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氧化石墨烯/壳聚糖复合物的制备及其对重金属离子的吸附性能

摘要 将氧化石墨烯水溶胶滴加到壳聚糖（CS）表面，成功获得氧化石墨烯/壳聚糖复合材料（GC）。通过扫描电子显微镜和X射线衍射对复合材料进行了表征。制备的吸附剂用于模拟100 mL 50 mg/L模拟废水样品中铜、铅和镉离子的静态吸附。模拟废水pH为6时，初始投加量为70 mg，吸附时间为90 min，温度为20℃；铜、铅和镉的吸附容量分别为 60.7、48.7 和 32.3 mg/g。吸附解吸循环实验表明，GC对铜离子的吸附量在十个循环后可达初始吸附量的86%。