Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO<sub>2</sub> derived porous carbon

S. Baik; H. Zhang; Y. K. Kim; D. Harbottle; J.?W. Lee

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Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO₂ derived porous carbon

机译：通过磺化CO _{2 衍生的多孔碳增强水系统中锶离子的吸附能力和选择性}

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Oxygen-enriched carbon materials derived from carbon dioxide were functionalized using sulfonic acid to remove Sr2+ ions from aqueous solutions. Synthesized sulfonated porous carbon materials (PC-SO₃H) showed higher adsorption capacity and selectivity towards Sr2+ than non-functionalized porous carbons (PC). The formation of the C-SO₃H functional group in PC-SO₃H and its ability to proton exchange with Sr2+ was the main contributor to the enhanced performance. The maximum uptake capacity of Sr2+ by PC-SO₃H was 18.97 mg g?1, which was 1.74 times greater than PC. PC-SO₃H removed 99.9% and 97.6% of Sr2+ from aqueous solutions with initial Sr2+ concentrations of 5 mg L?1 and 10 mg L?1, respectively. Sr2+ adsorption showed rapid kinetics, reaching the adsorption equilibrium within 1 h with high adsorption capacity at equilibrium which is 3.52 times greater than that of PC. Additionally, PC-SO₃H selectively adsorbed Sr2+ even in the presence of excess amounts of competing ions. Sulfonation of oxygen-enriched carbon had a significant effect on enhancing the affinity towards Sr2+ and suppressing adsorption towards other competing ions.

机译：使用磺酸对源自二氧化碳的富氧碳材料进行功能化，以从水溶液中去除Sr 2 + 离子。合成的磺化多孔碳材料（PC-SO _{3 H）显示出更高的吸附能力和对Sr 2 + 的选择性比未官能化的多孔碳（PC） PC-SO _{3 H中C-SO _{3 H官能团的形成及其质子交换能力与Sr 2 + 的交换是增强性能的主要原因。 PC-SO _{3 H对Sr 2 + 的最大吸收容量为18.97 mg g < sup>？1 ，是PC的1.74倍。 PC-SO _{3 H从初始Sr <的水溶液中去除了99.9％和97.6％的Sr 2 + small> 2 + 浓度为5 mg L ？1 和10 mg L ？1 。 Sr 2 + 吸附表现出快速的动力学，在1 h内达到吸附平衡，在平衡状态下的吸附能力高，是PC的3.52倍。此外，即使存在过量竞争离子，PC-SO _{3 H仍会选择性吸附Sr 2 + 。富氧碳的磺化对增强对Sr 2 + 的亲和力和抑制对其他竞争离子的吸附具有显著作用。}}}}}}

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《RSC Advances》 |2017年第86期|共8页
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S. Baik; H. Zhang; Y. K. Kim; D. Harbottle; J.?W. Lee;
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1. Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO2 derived porous carbon [J] . Baik S., Zhang H., Kim Y. K., RSC Advances . 2017,第86期

机译：通过CO 2衍生多孔碳的磺化增强了水系统中锶离子的吸附能力和选择性
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7. Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO2 derived porous carbon [O] . Baik, S, Zhang, H, Kim, YK, 2017

机译：通过磺化CO 2衍生的多孔碳，提高了水系统中锶离子的吸附能力和选择性
8. ADSORPTION OF ALIPHATIC ALCOHOLS AND ACIDS FROM BINARY AQUEOUS SOLUTION BY NON-POROUS CARBONS [R] . Roy P. Craig, Robert S. Hansen 1953

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Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO2 derived porous carbon

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Enhanced adsorption capacity and selectivity towards strontium ions in aqueous systems by sulfonation of CO₂ derived porous carbon