当前位置: X-MOL 学术Int. J. Environ. Sci. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Multiuse silicon hybrid polyurea-based polymer for highly effective removal of heavy metal ions from aqueous solution
International Journal of Environmental Science and Technology ( IF 3.1 ) Pub Date : 2021-05-08 , DOI: 10.1007/s13762-021-03355-6
A. M. Aldawsari , I. H. Alsohaimi , H. M. A. Hassan , A. J. Al-Abduly , I. Hassan , E. A. M. Saleh

Due to the growing quantities of numerous toxic and dangerous pollutants, wastewater has created increasing risks. Adsorption is extensively implemented for various wastewater remediation processes owing to its facility, reasonable treatment quality, capable of a large range of adsorbents, and low-cost. Therefore, the in situ polymerization method was successfully used via the reaction of pyromellitic acid dianhydride (PMDA) and N-(3-(trimethoxysilyl) propylene ethylene diamine (TMSPEDA) followed by modification with toluene 2, 4-diisocyanate (TDI) for the synthesis of silicon hybrid polyurea-based polymer (SiHPUP). Due to its high selectivity, high thermal stability, and total insolubility in water, the hybrid polymer has been used as an outstanding sorbent for heavy metal ions [Co(II), Pb(II), and Cr(III)]. Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), and scanning electron microscope (SEM) have been used to characterize the hybrid sorbent (SiHPUP). Adsorption studies showed high adsorption of Cr(III) on SiHPUP, followed by Pd(II) and Co(II) at pH 7.5. The process was thermodynamically exothermic. The best-adapted models for the results were Langmuir and the pseudo-second-order kinetics model. Kinetic tests provide superior results at lower concentrations of SiHPUP for Cr(III) and Pd(II), while at higher concentrations, Co(II) adsorption was favourable. Highest elution of Pb(II) (94.3%) > Co(II) (92.4%) > Cr(III) (83.1%) with HCl (0.1 M) was demonstrated in desorption studies. The regeneration studies showed a 9, 10, and 16% loss in Cr(III), Co(II), and Pb(II) adsorption, respectively, on SiHPUP, after four consecutive cycles. According to the findings, the fabricated silicon hybrid polyurea-based polymer provides a new insight and optimistic design for heavy metal wastewater purification.



中文翻译:

多用途硅杂化聚脲基聚合物,可高效去除水溶液中的重金属离子

由于大量有毒和危险污染物的数量不断增加,废水产生了越来越大的风险。由于吸附设备的便利性,合理的处理质量,能够吸附多种吸附剂且成本低廉,因此广泛用于各种废水修复过程。因此,就地最适合结果的模型是Langmuir和伪二级动力学模型。动力学测试在较低浓度的Cr(III)和Pd(II)的SiHPUP中提供了优异的结果,而在较高的浓度下,Co(II)的吸附是有利的。解吸研究表明,用HCl(0.1 M)洗脱的Pb(II)(94.3%)> Co(II)(92.4%)> Cr(III)(83.1%)最高。再生研究表明,在连续四个循环后,SiHPUP上的Cr(III),Co(II)和Pb(II)吸附量分别减少了9%,10%和16%。根据发现,所制造的硅杂化聚脲基聚合物为重金属废水净化提供了新的见识和乐观的设计。而在较高浓度下,Co(II)的吸附是有利的。解吸研究表明,用HCl(0.1 M)洗脱的Pb(II)(94.3%)> Co(II)(92.4%)> Cr(III)(83.1%)最高。再生研究表明,在连续四个循环后,SiHPUP上的Cr(III),Co(II)和Pb(II)吸附量分别减少了9%,10%和16%。根据发现,所制造的硅杂化聚脲基聚合物为重金属废水净化提供了新的见识和乐观的设计。而在较高浓度下,Co(II)的吸附是有利的。解吸研究表明,用HCl(0.1 M)洗脱的Pb(II)(94.3%)> Co(II)(92.4%)> Cr(III)(83.1%)最高。再生研究表明,在连续四个循环后,SiHPUP上的Cr(III),Co(II)和Pb(II)吸附量分别减少了9%,10%和16%。根据发现,所制造的硅杂化聚脲基聚合物为重金属废水净化提供了新的见识和乐观的设计。连续四个周期后。根据发现,所制造的硅杂化聚脲基聚合物为重金属废水净化提供了新的见识和乐观的设计。连续四个周期后。根据发现,所制造的硅杂化聚脲基聚合物为重金属废水净化提供了新的见识和乐观的设计。

更新日期:2021-05-08
down
wechat
bug