在不同农业固体废物中的生物炭上进行醇吸附的比较研究
Wenjie Nie1,2, Qianqian Che1, Danni Chen1
1College of Geology and Environment, Xi'an University of Science and Technology, 58 Yanta Road, Xi'an 710054, China.
Materials (Basel, Switzerland)
|June 27, 2024
概括
农业固体废物转化为生物炭有效吸附制药等污染物. 这项研究表明,玉米茎生物炭对制药污染物PRO具有最高的吸附能力,为水处理应用提供了洞察力.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- 农业固体废物带来了环境挑战.
- 热解将废物转化为生物炭,这是具有显著吸附能力的材料.
- 药品,如PRO,是新出现的环境污染物,需要有效的去除方法.
研究的目的:
- 研究制药污染物PRO对来自不同农业原料的生物炭的吸附.
- 了解pH,共存离子 (Na+,Ca2+) 和酸 (HA) 对PRO吸附的影响.
- 确定控制PRO-生物炭相互作用的吸附等温和运动模型.
主要方法:
- 农业固体废物 (玉米茎,果木,米) 的热解,以生产生物炭.
- 批量吸附实验以评估PRO去除效率.
- 分析包括pH值,离子强度和酸度在内的因素.
- 用弗洛伊德利希和伪二阶模型应用于等温和运动数据.
主要成果:
- 玉米茎生物炭表现出最高的PRO吸附能力 (10.97毫克/克),其次是果木 (10.09毫克/克) 和米 (8.78毫克/克).
- 吸附能力在pH值高达9时增加,然后下降.
- 增加的Na+和Ca2+度降低了PRO吸附,表明静电相互作用和阴离子交换.
- 酸显示出双相作用,在低度 (<20 mg/L) 中促进吸附,在更高度中抑制吸附.
- 吸附遵循弗洛伊德利希等温模型 (异质吸附) 和伪二阶动力学.
结论:
- 从农业废物中提取的生物炭是从水生环境中去除PRO的有希望的吸收剂.
- 吸附过程受到溶液化学的影响,涉及静电相互作用和阴离子交换.
- 了解这些相互作用为生物炭在废水处理中的实际应用提供了理论基础.
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