三硫氰尿酸功能化水凝胶用于有效去除亚甲基蓝和 Pb(II)阳离子污染物。
Trithiocyanurate-functionalized hydrochar for effectively removing methylene blue and Pb (II) cationic pollutants.
机构信息
College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, PR China.
College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, PR China.
出版信息
Environ Pollut. 2023 Nov 15;337:122585. doi: 10.1016/j.envpol.2023.122585. Epub 2023 Sep 19.
Functionalization can change the physicochemical properties of hydrochar and improve its ability to adsorb pollutants. Herein, a trithiocyanurate-functionalized hydrochar (TTHC) was obtained from acylation of chloroacetyl chloride and hydrochar and modification with trithiocyanuric acid in alkaline conditions. TTHC can efficiently remove cationic methylene blue (MB) and Pb(II) from wastewater. The removal can be expressed with pseudo-second-order kinetic and Langmuir models. The MB and Pb(II) removed uptakes by TTHC at 298 K exceeded 909.9 and 182.8 mg g respectively, and the removal rates reached 90% and 98% within 120 min respectively. Characterizations show TTHC is functionalized with trithiocyanurate, and rich in thiolate and aromaticity, and tends to adsorb MB/Pb(II) via multiple adsorption mechanisms. After five sorption-desorption regeneration cycles, TTHC maintained 80% and 99% adsorption capacities for MB and Pb(II) respectively. Therefore, TTHC is a promising efficient sorbent for removing MB and Pb(II) from effluents.
功能化可以改变水热炭的物理化学性质，提高其吸附污染物的能力。本文通过氯乙酰氯和水热炭的酰化反应以及在碱性条件下与三硫氰尿酸的修饰，得到了一种三硫氰尿酸功能化的水热炭（TTHC）。TTHC 可以有效地从废水中去除阳离子亚甲基蓝（MB）和 Pb(II)。去除过程可以用拟二级动力学和 Langmuir 模型来表示。在 298 K 时，TTHC 对 MB 和 Pb(II)的去除吸附量分别超过 909.9 和 182.8 mg g，且在 120 min 内去除率分别达到 90%和 98%。表征结果表明，TTHC 被三硫氰尿酸功能化，富含硫醇和芳香性，通过多种吸附机制倾向于吸附 MB/Pb(II)。经过五次吸附-解吸再生循环后，TTHC 对 MB 和 Pb(II)的吸附容量分别保持 80%和 99%。因此，TTHC 是一种很有前途的高效吸附剂，可以从废水中去除 MB 和 Pb(II)。
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