Chemical Industry and Engineering Progress ›› 2023, Vol. 42 ›› Issue (4): 2160-2170.DOI: 10.16085/j.issn.1000-6613.2022-1152

• Resources and environmental engineering • Previous Articles     Next Articles

Adsorption of ciprofloxacin hydrochloride by biochar from food waste digestate residues

WANG Yu1,2(), YU Guangwei1,3(), JIANG Ruqing1, LI Changjiang1,4, LIN Jiajia1,2, XING Zhenjiao1   

  1. 1.CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, Fujian, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
    3.Fujian Municipal Solid Waste Resource Recovery Technology Research Center, Xiamen 361021, Fujian, China
    4.College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
  • Received:2022-06-20 Revised:2022-07-27 Online:2023-05-08 Published:2023-04-25
  • Contact: YU Guangwei

餐厨厌氧沼渣生物炭吸附盐酸环丙沙星

王玉1,2(), 余广炜1,3(), 江汝清1, 黎长江1,4, 林佳佳1,2, 邢贞娇1   

  1. 1.中国科学院城市环境研究所,中国科学院城市污染物转化重点实验室,福建 厦门 361021
    2.中国科学院大学,北京 100049
    3.福建省城市固体废弃物资源化工程技术研究中心,福建 厦门 361021
    4.福建农林大学 生命科学学院,福建 福州 350002
  • 通讯作者: 余广炜
  • 作者简介:王玉(1996—),男,硕士研究生,主要研究方向为固体废弃物资源化利用与污染物控制。E-mail:yuwang@iue.ac.cn
  • 基金资助:
    国家重点研发计划(2020YFC1908904);中国科学院A类战略性先导科技专项(XDA23020504);福建省自然科学基金(2019J01135);福建省STS项目(2021T3069)

Abstract:

The biochars were prepared by pyrolysis of food waste digestate residues at five temperatures (400℃, 500℃, 600℃, 700℃ and 800℃), and their morphological characteristics, pore structures and surface functional groups were analyzed to investigate the effect of adsorption of ciprofloxacin hydrochloride (CIP) in aqueous solution. The results showed that the biochar prepared by pyrolysis at 700℃ (DR-700) became loose and porous with rich surface functional groups, better pore structure and microstructure. DR-700 had the best adsorption effect on CIP among the five biochars and could reach 95.09% removal of CIP, which could be used as a good adsorption material. The adsorption of CIP on DR-700 was more in line with the pseudo-first-order kinetic and Freundlich isotherm models, which indicated that physical adsorption might be the main mechanism of CIP adsorption on DR-700, and was more attributed to the rich surface area. In contrast, the simultaneous chemisorption might be due to cation exchange interactions, electrostatic interactions, π-π interactions, hydrophobic and hydrogen bonding interactions. Therefore, the use of biochar prepared by food waste digestate residues had a good adsorption and purification effect on CIP in aqueous solution, which not only provided a new material for the low-cost treatment of antibiotic wastewater, but also provided a new solution to solve the problem of resource utilization of anaerobic fermentation end products of food waste, and had good application potential.

Key words: food waste digestate residues, biochar, adsorption, ciprofloxacin hydrochloride, removal mechanism

摘要:

将餐厨厌氧沼渣在5种温度(400℃、500℃、600℃、700℃和800℃)下热解制备生物炭,解析其形貌特征、孔隙结构以及表面官能团等变化规律,探究其对水溶液中的盐酸环丙沙星(CIP)吸附效果,并通过吸附动力学和等温吸附特性探究其吸附机制。结果表明,在700℃下热解制备的生物炭(DR-700)疏松多孔,表面官能团丰富且具有更好的孔隙结构和微观结构,在所有生物炭中对于CIP的吸附效果最好。吸附去除率可达95.09%,可用作良好的吸附材料。DR-700对于CIP的吸附更符合伪一阶动力学和Freundlich等温线模型,表明物理吸附可能是CIP在DR-700吸附的主要机制,主要归功于丰富的比表面积。而同时存在的化学吸附则可能是由于阳离子交换相互作用、静电相互作用、π-π相互作用、疏水和氢键共同作用。因此,利用餐厨厌氧沼渣热解制备生物炭对水溶液中的CIP具有良好的吸附净化效果,这不但可以为抗生素废水低成本处理提供新的材料,还为解决餐厨垃圾厌氧发酵末端产物的资源化利用问题提供一种新方案,具有良好的应用潜力。

关键词: 餐厨厌氧沼渣, 生物炭, 吸附, 盐酸环丙沙星, 去除机制

CLC Number: 

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