Functional Modification Of Different Dimensionality Carbon Materials And The Adsorption Study Of Pb²⁺

With the rapid development of modern industry,heavy metal ions pollution has been becoming more and more seriously.Heavy metal ions pollution can not only cause the serious pollution to the environment,but also be harmful to the health of animals and human beings,Therefore,It is important to prepared some kinds of adsorbents to adsorb the heavy metal ions.In this paper,choosing the lead ion as an example,some adsorbents with good properties have been prepared to achieve the adsorption of Pb²⁺.Firstly,in this work,choosing three diffferent Dimensionality Carbon Materials:Carbon spheres?CSs?as a kind of zero dimension carbon material were prepared with hydrothermal method.Carbon nanotube?CNT?as a kind of one-dimensional carbon material and raphene oxides?GOs?as two-dimensional carbon material were prepared by Hummer's method..in order to improve the adsorption properties of carbon materials,By using these oxygen-containing functional groups to react with carbon disulfide?CS2?,the xanthate groups were introduced to improve their adsorption capacity.CCS,COCNT,CGO materials were obtained by the reaction of carbon material with different proportions of CS2.they could respectively form chelation interactions with heavy metal ions.So the materials were used to achieve the adsorption of Pb²⁺.The maximum adsorption capacities for Pb²⁺were 250.0,357.1and 500.0 mg/g for the modified CSs,OCNTs and GOs,The kinetic adsorption fit the pseudo-second-order model and the isotherm data followed the Langmuir model well.Secondly,when the adsorbent is used in the actual production and daily life,It is necessary to take into account the problem of the recovery of the adsorbents.In this work,a kind of carbon spheres with magnetic properties was prepared to solve this problem.According to modified with CS_2,This kind of adsorbent?CCSs/Fe₃O₄?was used to adsorb the lead ions.When this adsorbent accomplish the adsorb the Pb²⁺,the adsorbent can easily been recovered because of its magnetic properties.The max-imum adsorption capacities for Pb²⁺were 227.3 mg/g by the CCSs/Fe₃O_4.Finally,in order to achieve continuous adsorption of Pb²⁺,in this work,a kind of gel material also had been designed.CSs was used to inset into the interspace between the layers of GO,This gel material?CCSs/CGOs?can not only achieve continuous adsorption of Pb²⁺,and also can easily been recovered because of its special gel stru-cture.Thus,This material largely optimized the performance of adsorbents.