在这里，以马尾松花粉为原料，通过两步法成功制备了一种新型生物吸附剂。这种生物吸附剂在消除亚甲蓝（MB）中的功效，一种典型的有机阳离子染料，从高浓度工业废水进行了研究。结果表明,通过调节花粉微载体的润湿性,可以显着提高它们对阳离子染料的吸附能力，导致了25倍的显着改善。改性马尾松花粉微载体（MPPMC）在特定条件下表现出最佳吸附容量（585mg/g）和快速平衡（5分钟内达到97.6％，摄取487.8mg/g），即使在室温下，在高效、快速地删除MB方面表现出卓越的性能。值得注意的是，改性的微载体可以通过一个简单的pH控制的吸附-解吸循环再生，即使在经历五个循环后仍保持其卓越的效率(>99%)，表明其优异的再现性。MB在MPPMC上的吸附过程服从拟二级动力学模型，遵循Langmuir模型。通过引入的修改，羧基的大量去质子化显着增强了MPPMC和MB之间的静电和氢键相互作用。总的来说,这项研究提供了一个可持续的，环保生物吸附剂，MPPMC显示出有效和快速去除废水中有机阳离子染料的巨大潜力。
Herein, a novel biosorbent was successfully fabricated through a two-step process employing Pinus massoniana pollen as raw material. The efficacy of this biosorbent in eliminating methylene blue (MB), a typical organic cationic dye, from highly concentrated industrial wastewater was investigated. The results demonstrated that by adjusting the wettability of pollen microcarriers, it is possible to significantly increase their adsorption capacity for cationic dyes, resulting in a remarkable 25-fold improvement. The modified Pinus massoniana pollen microcarriers (MPPMC) exhibited an optimal adsorption capacity (585 mg/g) under specific conditions and a rapid equilibrium (97.6% in 5 min, uptake 487.8 mg/g) even at room temperature, showing excellent performance in removing MB efficiently and quickly. It is worth noting that the modified microcarriers could be regenerated via a simple pH-controlled adsorption-desorption cycle, maintaining their superior efficiency (> 99%) even after undergoing five cycles, indicating their excellent reproducibility. The MB adsorption process on MPPMC obeyed the pseudo-second-order kinetic model and followed the Langmuir model. Through the introduced modifications, the substantial deprotonation of carboxyl groups notably augmented electrostatic and hydrogen bonding interactions between MPPMC and MB. Overall, this study offers a sustainable, eco-friendly biological adsorbent, and the MPPMC exhibit the considerable potential for efficient and rapid removal of organic cationic dyes in wastewater.
