Resource utilization of typical biomass wastes as biochars in removing plasticizer diethyl phthalate from water: characterization and adsorption mechanisms  

作　　者：Mei Shi Xiao Wang Mengying Shao Lun Lu Habib Ullah Hao Zheng Fengmin Li 

机构地区：[1]Institute of Coastal Environmental Pollution Control,College of Environmental Science and Engineering,Key Laboratory of Marine Environment and Ecology(Ministry of Education),Ocean University of China,Qingdao 266100,China [2]State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment,South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 510655,China [3]Department of Environmental Science,Zhejiang University,Hangzhou 310058,China [4]Marine Ecology and Environmental Science Laboratory,Pilot National Laboratory for Marine Science and Technology,Qingdao 266071,China [5]Sanya Oceanographic Institution,Ocean University of China,Sanya 572000,China

出　　处：《Frontiers of Environmental Science & Engineering》2023年第1期49-61,共13页环境科学与工程前沿（英文）

基　　金：supported by the Shandong Provincial Major Science and Technology Innovation Project(China)(2019JZZY020302);the National Natural Science Foundation of China(Grant No.22106136);Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City(China)(220LH061);National Science Fund for Distinguished Young Scholars of Shandong Province(China)(ZR2021JQ13).

摘　　要：Plastic pollution as a global environmental issue has become a research hotspot,among which the removal of inherent plasticizer(e.g.,phthalic acid esters,PAEs)received increasing attention.However,the effects of biochars derived from different feedstocks on the adsorption of PAEs are poorly understood.Thus,the characteristics of biochars derived from six largely produced biomass wastes in China at 400°C,as well as their performance in adsorption of diethyl phthalate(DEP),one of frequently detected PAEs in aqueous environment,were investigated.The results indicated that the variation in feedstock type showed significant changes in the properties(e.g.,porosity,specific surface area,surface functional groups)of biochars,which affected DEP adsorption and desorption.Pseudosecond order and Freundlich models fitted the adsorption data well,and adsorption mechanisms mainly included hydrophobic effect,followed by micropore filling,hydrogen bonding,andπ-πEDA interactions.Adsorption thermodynamics revealed that the adsorption was a spontaneous and exothermic the adsorption capacities of DEP on these biochars slightly decreased with the increasing pH but increased with the increasing ionic strength.Among these biochars,the giant reed biochar with relatively higher DEP adsorption and low desorption exhibited the great efficiency for DEP removal as an environment-friendly sorbent.These results highlighted the significant roles of micropore filling and hydrogen bond in determining adsorption capacity of designed biochars prepared from selecting suitable agricultural straws and wetland plant waste to typical plasticizer.The findings are useful for producing designed biochars from different biomass wastes for plasticizer pollution control.

关 键 词：Plastic pollution Phthalic acid esters Designed biochar Wetland plant ADSORPTION 

分 类 号：O64[理学—物理化学]