Biochars derived from carp residues:characteristics and copper immobilization performance in water environments  

作　　者：Hongtao Qiao Yongsheng Qiao Cuizhu Sun Xiaohan Ma Jing Shang Xiaoyun Li Fengmin Li Hao Zheng 

机构地区：[1]Institute of Applied Chemistry&Department of Chemistry,Xinzhou Teachers University,Xinzhou 034000,China [2]Institute of Coastal Environmental Pollution Control,Ministry of Education Key Laboratory of Marine Environment and Ecology,College of Environmental Science and Engineering,Frontiers Science Center for Deep Ocean Multispheres and Earth System,Ocean University of China,Qingdao 266100,China [3]Department of Environmental Science,School of Geography and Tourism,Shaanxi Normal University,Xi'an 710119,China [4]Sanya Oceanographic Institution,Ocean University of China,Sanya 572000,China

出　　处：《Frontiers of Environmental Science & Engineering》2023年第6期99-112,共14页环境科学与工程前沿（英文）

基　　金：This work was financially supported by the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province(China)(No.2021L460);the Key R&D Project of Shaanxi Province(China)(No.2022NY-054);the Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City(China)(No.220LH061);the Natural Science Fund for Distinguished Young Scholars of Shandong Province(China)(No.ZR2021JQ13).

摘　　要：Heavy metal pollution has attracted worldwide attention because of its adverse impact on the aquatic environment and human health.The production of biochar from biowaste has become a promising strategy for managing animal carcasses and remediating heavy metal pollution in the aquatic environment.However,the sorption and remediation performance of carp residue-derived biochar(CRB)in Cu-polluted water is poorly understood.Herein,batches of CRB were prepared from carp residues at 450–650℃(CRB450–650)to investigate their physicochemical characteristics and performance in the sorption and remediation of Cu-polluted water.Compared with a relatively low-temperature CRB(e.g.,CRB450),the high-temperature biochar(CRB650)possessed a large surface area and thermodynamic stability.CRB650 contained higher oxygen-containing functional groups and P-associated minerals,such as hydroxyapatite.As the pyrolytic temperature increased from 450 to 650℃,the maximum sorption capacity of the CRBs increased from 26.5 to 62.5 mg/g.The adsorption process was a type of monolayer adsorption onto homogenous materials,and the sorption of Cu^(2+)on the CRB was mainly based on chemical adsorption.The most effective potential adsorption mechanisms were in order of electrostatic attraction and cation-πinteraction>surface complexation and precipitation>pore-filling and cation exchange.Accordingly,the CRBs efficiently immobilized Cu^(2+)and reduced its bioavailability in water.These results provide a promising strategy to remediate heavy metal-polluted water using designer biochars derived from biowastes,particularly animal carcasses.

关 键 词：BIOWASTE Pyrolytic temperature IMMOBILIZATION BIOAVAILABILITY Remediation 

分 类 号：O64[理学—物理化学]