Adsorptive Uptake of Acetaminophen by Agricultural Waste-Derived Hydrochar: Kinetics, Isotherms, and Characterization Studies

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Sustainability Science Pub Date : 2025-02-24 DOI:10.3390/su17051923

Zaidun Naji Abudi, Rasha Al-Saedi, Alkhafaji R. Abood

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引用次数: 3

Abstract

In this paper, we investigated a hydrochar-derived agricultural waste (AWHC) as a sustainable adsorbent, modified with three types of modification methods (by layer double hydroxides (AWHC-LDH (Mg-Al)), chemical activation method by KOH (AWHC-KOH) and H3PO4 (AWHC-H3PO4), and then we used all four different types to remove acetaminophen (ACT) from synthetic solution. The maximum removal of ACT was 87%, 88%, 96%, and 97% for AWHC, AWHC-LDH (Mg-Al), AWHC-KOH, AWHC-H3PO4, respectively, at pH of 4 for AWHC-LDH (Mg-Al) and 6 for others, with a contact time of 120 min, initial concentration of 80 mg/L, adsorbent dose of 1.1 g, and speed of 200 rpm. The pseudo-second-order kinetic model could fit the adsorption process better (R2 = 0.953, 0.944, 0.924, and 0.934). The Langmuir model had the highest R2 for AWHC (0.952), AWHC-LDH (Mg-Al) (0.997), and AWHC-KOH (0.941), indicating its suitability for those hydrochars, while Freundlich isotherm had the highest R2 for AWHC-H3PO4 (0.946). The characterization results showed that LDH (Mg-Al) and KOH as modifications could effectively make the mesoporous structure. At the same time, H3PO4 developed a macroporous structure, shown by the scanning electron microscopy image supported by the Brunauer–Ettring–Teller and X-ray diffraction findings. The AWHC-LDH (Mg-Al) and AWHC-KOH exhibited better crystallinity and functional groups within the hydrochar matrix. Converting agricultural waste into practicable and sustainable materials for the environment’s benefit is a meaningful topic addressed in this paper.

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农业废弃物衍生的碳氢化合物对乙酰氨基酚的吸附：动力学、等温线和表征研究

以水合农业废弃物（AWHC）为吸附剂，采用三种改性方法(层双氢氧化物（AWHC- ldh (Mg-Al)）、KOH （AWHC-KOH）和H3PO4 （AWHC-H3PO4）化学活化法对其进行改性，并利用这四种改性方法对合成溶液中的对乙酰氨基酚（ACT）进行脱除。AWHC- ldh （mg - al）、AWHC- koh、AWHC- h3po4的ACT去除率分别为87%、88%、96%和97%，AWHC- ldh （mg - al）的pH为4，其他的为6，接触时间为120 min，初始浓度为80 mg/L，吸附剂剂量为1.1 g，转速为200 rpm。拟二级动力学模型能较好地拟合吸附过程（R2 = 0.953、0.944、0.924、0.934）。Langmuir模型对AWHC（0.952）、AWHC- ldh (Mg-Al)（0.997）和AWHC- koh（0.941）的拟合系数最高，而Freundlich模型对AWHC- h3po4的拟合系数最高，为0.946。表征结果表明，LDH （Mg-Al）和KOH作为改性剂可以有效地制备介孔结构。与此同时，H3PO4形成了大孔结构，由Brunauer-Ettring-Teller和x射线衍射结果支持的扫描电镜图像显示。AWHC-LDH （Mg-Al）和AWHC-KOH在烃类基质中表现出较好的结晶度和官能团。将农业废弃物转化为实用的、可持续的、有利于环境的材料是本文研究的一个有意义的课题。

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来源期刊

Sustainability Science 环境科学-环境科学

CiteScore

11.30

自引率

10.00%

发文量

174

审稿时长

3 months

期刊介绍： The journal Sustainability Science offers insights into interactions within and between nature and the rest of human society, and the complex mechanisms that sustain both. The journal promotes science based predictions and impact assessments of global change, and seeks ways to ensure that such knowledge can be understood by society and be used to strengthen the resilience of global natural systems (such as ecosystems, ocean and atmospheric systems, nutrient cycles), social systems (economies, governments, industry) and human systems at the individual level (lifestyles, health, security, and human values).