This work investigated the removal of antibiotic tetracycline (TC) from wastewater using nanocomposite material based on laterite modified with polyanion, polystyrene sulfonate (PSS). The effective factors influenced on the TC removal using nanocomposite PSS-modified laterite (NCPML) were optimized and found to be pH 4, solid-liquid ratio 5 mg/mL, and contact time 180 min. The highest removal of TC reached about 88% under the optimum adsorption conditions. The adsorption isotherm and kinetics of TC adsorption onto NCPML were in good agreement with the Langmuir and pseudo-second-order models, respectively. The characteristics of the NCPML material before and after TC adsorption were examined by zeta (ζ) potential measurements, Brunauer–Emmett–Teller (BET) method, and Fourier transform infrared spectroscopy (FT-IR). The TC adsorption onto NCPML was induced by electrostatic interaction, hydrogen bonding, and diffusion interaction. The TC removal from wastewater was approximately 94% while efficiency still reached 66% after five regenerations. Our research reveals that NCPML is a high-performance adsorbent for TC removal from wastewater.

中文翻译：

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基于聚阴离子改性红土材料的纳米复合材料去除水溶液中的四环素

这项工作研究了使用基于聚阴离子，聚苯乙烯磺酸盐（PSS）改性的红土的纳米复合材料从废水中去除抗生素四环素（TC）。优化了影响使用纳米复合PSS改性红土（NCPML）去除TC的有效因素，发现其pH值为4，固液比为5 mg / mL，接触时间为180分钟。在最佳吸附条件下，TC的最高去除率达到约88％。TC在NCPML上的吸附等温线和动力学与Langmuir模型和拟二阶模型分别吻合良好。用zeta（ζ）检测TC吸附前后NCPML材料的特性）电位测量，Brunauer-Emmett-Teller（BET）方法和傅立叶变换红外光谱（FT-IR）。TC吸附在NCPML上是由静电相互作用，氢键和扩散相互作用引起的。五次再生后，废水中的TC去除率约为94％，效率仍然达到66％。我们的研究表明，NCPML是一种用于去除废水中TC的高性能吸附剂。