Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor, Bahru, Johor, Malaysia; Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, 298-300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Viet Nam.
Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor, Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM Johor Bahru, Johor, Malaysia.
Chemosphere. 2024 Jun;358:142087. doi: 10.1016/j.chemosphere.2024.142087. Epub 2024 Apr 22.
Bidens pilosa is classified as an invasive plant and has become a problematic weed to many agricultural crops. This species strongly germinates, grows and reproduces and competing for nutrients with local plants. To lessen the influence of Bidens pilosa, therefore, converting this harmful species into carbon materials as adsorbents in harm-to-wealth and valorization strategies is required. Here, we synthesized a series of magnetic composites based on MFeO (M = Ni, Co, Zn, Fe) supported on porous carbon (MFOAC) derived from Bidens pilosa by a facile hydrothermal method. The Bidens pilosa carbon was initially activated by condensed HPO to increase the surface chemistry. We observed that porous carbon loaded NiFeO (NFOAC) reached the highest surface area (795.7 m g), followed by CoFeO/AC (449.1 m g), FeO/AC (426.1 m g), ZnFeO/AC (409.5 m g). Morphological results showed nanoparticles were well-dispersed on the surface of carbon. RhB, MO, and MR dyes were used as adsorbate to test the adsorption by MFOAC. Effect of time (0-360 min), concentration (5-50 mg L), dosage (0.05-0.2 g L), and pH (3-9) on dyes adsorption onto MFOAC was investigated. It was found that NFOAC obtained the highest maximum adsorption capacity against dyes, RhB (107.96 mg g) < MO (148.05 mg g) < MR (153.1 mg g). Several mechanisms such as H bonding, π-π stacking, cation-π interaction, and electrostatic interaction were suggested. With sufficient stability and capacity, NFOAC can be used as potential adsorbent for real water treatment systems.
鬼针草被归类为入侵植物，已成为许多农作物的有害杂草。该物种具有很强的发芽、生长和繁殖能力，并与当地植物争夺养分。因此，为了减轻鬼针草的影响，需要将这种有害物种转化为碳材料，作为有害到有益和增值策略中的吸附剂。在这里，我们通过简便的水热法，从鬼针草中合成了一系列基于多孔碳（MFOAC）负载的 MFeO（M = Ni、Co、Zn、Fe）的磁性复合材料。鬼针草碳首先通过凝聚的 HPO 进行激活，以增加表面化学性质。我们观察到，负载 NiFeO 的多孔碳（NFOAC）达到了最高的比表面积（795.7 m g），其次是 CoFeO/AC（449.1 m g）、FeO/AC（426.1 m g）、ZnFeO/AC（409.5 m g）。形态学结果表明，纳米颗粒很好地分散在碳的表面上。RhB、MO 和 MR 染料被用作吸附质来测试 MFOAC 的吸附作用。考察了 MFOAC 对染料吸附的时间（0-360 min）、浓度（5-50 mg L）、用量（0.05-0.2 g L）和 pH（3-9）的影响。结果发现，NFOAC 对染料的最大吸附容量最高，RhB（107.96 mg g）<MO（148.05 mg g）<MR（153.1 mg g）。提出了氢键、π-π堆积、阳离子-π 相互作用和静电相互作用等几种机制。NFOAC 具有足够的稳定性和容量，可作为实际水处理系统的潜在吸附剂。
