title: Efficient removal of lead from solution by celery-derived biochars rich in alkaline minerals.
abstract: Biochars were produced from celery biomass by slow pyrolysis at 350 and 500°C, and featured by high content of alkaline minerals namely salts of alkali and alkaline earth metals. The biochars' efficiency on removing Pb2+from solution was investigated, and two biochars derived from celery stalk (StC350 and StC500) showed higher Pb2+sorption capacity (288 and 304mg/g) than most biochars reported previously. The sorption mechanisms involving precipitation, cation exchange and surface complexation are related to three biochar fractions namely water-soluble matter, acid-soluble substances and insoluble organic carbon. The relative contributions of water-soluble matter and acid-soluble substances to the total Pb2+removal were 59.8% and 36.6% for the StC350 biochar, and 62.8% and 34.9% for the StC500 biochar, respectively. The results indicate that biochars derived from vegetable wastes are potential candidates for efficient sorption of heavy metals.
authors.affiliation: College of Chemistry & Chemical Engineering, Shaoxing University, Zhejiang 312000, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.affiliation: College of Chemistry & Chemical Engineering, Shaoxing University, Zhejiang 312000, China.
authors.forename: Xiaoxiao
authors.initials: X
authors.lastname: Zhu
authors.affiliation: College of Chemistry & Chemical Engineering, Shaoxing University, Zhejiang 312000, China.
authors.forename: Lingna
authors.initials: L
authors.lastname: Shi
authors.affiliation: College of Chemistry & Chemical Engineering, Shaoxing University, Zhejiang 312000, China. Electronic address: ljf@usx.edu.cn.
authors.forename: Jianfa
authors.initials: J
authors.lastname: Li
authors.affiliation: College of Chemistry & Chemical Engineering, Shaoxing University, Zhejiang 312000, China.
authors.forename: Saijun
authors.initials: S
authors.lastname: Li
authors.affiliation: College of Chemistry & Chemical Engineering, Shaoxing University, Zhejiang 312000, China.
authors.forename: Jinhong
authors.initials: J
authors.lastname: Lü
authors.affiliation: College of Chemistry & Chemical Engineering, Shaoxing University, Zhejiang 312000, China.
authors.forename: Yimin
authors.initials: Y
authors.lastname: Li
mesh_terms: D000327:Adsorption; D000077102:Apium; D002606:Charcoal; D019216:Metals, Heavy; D008903:Minerals; D012996:Solutions
chemical_list: D019216:Metals, Heavy; D008903:Minerals; D012996:Solutions; D002606:Charcoal
keywords: Biochar; Heavy metal; Mineral; Sorption; Vegetable waste