In this work, for the first time a new carbon nanomaterial (CNM) with was synthesized from charcoal and characterized using SEM, TEM, EDX, CHNS, FTIR, XRD and Raman analysis. The obtained characterization results showed that the synthesized CNM has two-dimentional morphology (layer structure with nanometeric thickness), high oxygen and nitrogen contents (with carbon to oxygen atomic ratio of about 2.11) and interlayer spacing of about 0.8 nm. The synthesized CNM was used to prepare a positively charged membrane via vacuum-filtration method for removal of divalent heavy metal ions from contaminated water. Hyperbranched polyethyleneimine (HPEI) was used as crosslinking agent. Structure and properties of the prepared membranes without and with HPEI crosslinking were characterized using SEM and WCA analysis. The WCA of the prepared membranes without and with HPEI crosslinking is about 51° and 60°, respectively. Performance and separation mechanism of the prepared membranes were investigated. The prepared HPEI crosslinked membrane with positively charged surface showed superior performance for removal of divalent heavy metal ions from aqueous solutions with rejection sequence of R (Zn²⁺: 95.65%) > R (Cd²⁺: 94.10%) > R (Cu²⁺: 92.56%) > R (Ni²⁺: 92.34%) > R (Pb²⁺: 90.51%). The obtained results showed that performance of the prepared HPEI crosslinked membrane is based on steric hindrance and Donnan electrostatic exclusion. Performance of the prepared crosslinked membrane during four cycles of regeneration was also evaluated. The prepared membrane with high structural stability and durability can be employed repeatedly for divalent heavy metal ions removal from contaminated water.

在这项工作中，首次用木炭合成了一种新的碳纳米材料（CNM），并使用SEM，TEM，EDX，CHNS，FTIR，XRD和拉曼分析对其进行了表征。获得的表征结果表明，合成的CNM具有二维形态（具有纳米厚度的层结构），高的氧和氮含量（碳与氧的原子比为约2.11）和层间间距为约0.8nm。合成的CNM用于通过真空过滤法制备带正电荷的膜，以从污水中去除二价重金属离子。超支化聚乙烯亚胺（HPEI）用作交联剂。使用SEM和WCA分析表征了不具有和具有HPEI交联的制备的膜的结构和性质。制备的没有和有HPEI交联的膜的WCA分别为约51°和60°。研究了制备的膜的性能和分离机理。制备的带正电表面的HPEI交联膜表现出优异的去除R（Zn（Zn）的顺序从水溶液中去除二价重金属离子的性能²⁺：95.65％）> R（Cd ²⁺：94.10％）> R（Cu ²⁺：92.56％）> R（Ni ²⁺：92.34％）> R（Pb ²⁺：90.51％）。所得结果表明，所制备的HPEI交联膜的性能基于空间位阻和Donnan静电排斥。还评估了在四个再生周期中制备的交联膜的性能。所制备的具有高结构稳定性和耐久性的膜可重复用于从污染水中去除二价重金属离子。