Enhanced ammonium removal on biochar from a new forestry waste by ultrasonic activation: Characteristics, mechanisms and evaluation

doi:10.1016/j.scitotenv.2021.146295

	Enhanced ammonium removal on biochar from a new forestry waste by ultrasonic activation: Characteristics, mechanisms and evaluation
	Wang, Tongtong 3; Li, Gaoliang 1; Yang, Kaiqi 3; Zhang, Xiaoyuan 3; Wang, Ke 3; Cai, Jinjun 2,3; Zheng, Jiyong 1,3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-07-15
卷号	778 页码:15
关键词	Caragana korshinskii biochar Ultrasonic activation Adsorption characteristics Mechanisms Ammonium
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2021.146295
通讯作者	Zheng, Jiyong(zhjy@ms.iswc.ac.cn)
英文摘要	The adsorption treatment of ammonium-containing wastewater has attracted significant global attention. Most enhanced adsorption methods employ chemical modification, and there are few reports on physical activation. We present a physical activation to explore whether physical ultrasound may enhance the adsorption performance and comprehensive utilisation of a new forestry waste, Caragana korshinskii was used as a feedstock to prepare activated biochar (ACB) by controlling the pyrolysis temperatures and ultrasound parameters. The optimal parameters were determined via batch adsorption of NH4+, and the adsorption characteristics were assessed by 8 kinds of models and influence experiments. Moreover, the physicochemical properties of ACB during the pyrolysis process were investigated, and the ultrasonic activation and adsorption mechanisms were discussed using multiple characterisation techniques. Additionally, the cost analysis, the safety of the ultrasonic process and disposal method also were evaluated. The results showed that the ultrasonic activation significantly enhanced the NH4+ adsorption efficiency of biochar by approximately 5 times. ACB exhibited the best performance at 500 degrees C with an ultrasonic activation time of 480 min, frequency of 45 kHz, and power of 700 W. The ultrasonic activation reduced the biochar ash and induced pore formation, which increased the specific surface area through cavitation corrosion and micro-acoustic flow mechanism. The NH4+ adsorption mechanisms comprised physicochemical processes, of which physical adsorption was dominant. The preparation cost of 1 kg ACB was about 0.42 US dollar, and no secondary pollution occurred in the activation process. The findings prove that ultrasonic technology is efficient and convenient for enhancing biochar adsorption performance, and thus is suitable for industrial applications and promotion. (C) 2021 Elsevier B.V. All rights reserved.
资助项目	National Key Research and Development Program of China[2017YFC0504504] ; National Key Research and Development Program of China[2016YFC0501702] ; Science and Technology Service Network Initiative of Chinese Academy of Sciences[KFJSTSQYZD177] ; Key Research and Development Project of Ningxia Hui Autonomous Region[2020BCF01001]
WOS关键词	ADSORPTION ; AGRICULTURE ; NITROGEN ; SORPTION ; CARBON ; WATER
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000655599100014
资助机构	National Key Research and Development Program of China ; Science and Technology Service Network Initiative of Chinese Academy of Sciences ; Key Research and Development Project of Ningxia Hui Autonomous Region
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163921]
专题	中国科学院地理科学与资源研究所
通讯作者	Zheng, Jiyong
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Ningxia Acad Agr & Forestry Sci, Inst Resources & Environm, Yinchuan 750002, Ningxia, Peoples R China 3.Northwest A&F Univ, Coll Nat Resources & Environm, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, Tongtong,Li, Gaoliang,Yang, Kaiqi,et al. Enhanced ammonium removal on biochar from a new forestry waste by ultrasonic activation: Characteristics, mechanisms and evaluation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,778:15.
APA	Wang, Tongtong.,Li, Gaoliang.,Yang, Kaiqi.,Zhang, Xiaoyuan.,Wang, Ke.,...&Zheng, Jiyong.(2021).Enhanced ammonium removal on biochar from a new forestry waste by ultrasonic activation: Characteristics, mechanisms and evaluation.SCIENCE OF THE TOTAL ENVIRONMENT,778,15.
MLA	Wang, Tongtong,et al."Enhanced ammonium removal on biochar from a new forestry waste by ultrasonic activation: Characteristics, mechanisms and evaluation".SCIENCE OF THE TOTAL ENVIRONMENT 778(2021):15.