POTENTIAL OF CARBON NANOMATERIALS FOR REMOVAL OF HEAVY METALS FROM WATER
POTENTIAL OF CARBON NANOMATERIALS FOR REMOVAL OF HEAVY METALS FROM WATER
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DOI：
10.1016/j.desal.2007.08.023
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发表时间：
2008-11
期刊：
影响因子：
9.9
通讯作者：
J. Ruparelia;S. Duttagupta;A. Chatterjee;S. Mukherji
中科院分区：
文献类型：
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作者：
J. Ruparelia;S. Duttagupta;A. Chatterjee;S. Mukherji
重金属，如镉，铅，镍和锌可以从水中去除使用吸附剂。通过选择合适的吸附剂，可以提高去除的速率和程度。在这项研究中，研究了本土合成的碳纳米材料（CNMs）的重金属吸附。两个不同的表面形态的CNM合成使用松节油在化学气相沉积（CVD）设置通过改变工艺参数。活化和催化剂的去除是通过用HNO3和KOH进行后处理来实现的。所产生的CNM的表征表明，两者均由石墨无定形碳组成，然而，虽然在N2气氛中使用钴催化剂产生的纳米碳（NC）由指示烟灰的不同粒度组成，但在H2气氛中使用二氧化硅催化剂产生的纳米多孔碳（NPC）具有独特的均匀多孔表面形态。与镉，铅，镍和锌的比较吸附研究也显示了更大的吸附NPC相比，NC。批量等温线的各种重金属使用NPC和广泛用于金属吸附的商业活性炭（AC）显示，NPC的特点是显着更高的金属吸附容量和更有利的吸附能量。NPC作为吸附剂的上级性能可能是由于其独特的纳米多孔结构。
Heavy metals, such as, cadmium, lead, nickel and zinc can be removed from water using sorbents. The rate and extent of removal may be enhanced by choice of appropriate sorbents. In this study heavy metal sorption was studied on indigenously synthesized carbon nanomaterials (CNMs). Two CNMs differing in surface morphology were synthesized using turpentine oil in a chemical vapour deposition (CVD) setup by varying the process parameters. Activation and catalyst removal were achieved by post-treatment with HNO3and KOH. Characterization of the CNMs produced revealed that both comprised of graphitic amorphous carbon, however, while the nanocarbon (NC) produced using cobalt catalyst in N2atmosphere comprised of varying grain sizes indicative of soot, the nanoporous carbon (NPC) produced using silica catalyst in H2atmosphere had a distinctive uniformly porous surface morphology. Comparative sorption studies with cadmium, lead, nickel and zinc also revealed greater sorption on NPC compared to NC. Batch isotherms for the various heavy metals using NPC and a commercial activated carbon (AC) widely used for metal sorption revealed that NPC is characterized by significantly higher metal sorption capacity and more favourable sorption energetics. The superior performance of NPC as a sorbent may be due to its unique nanoporous structure.