title: Influence of Al-oxide on pesticide sorption to woody biochars with different surface areas.
abstract: Biochars' properties will change after application in soil due to the interactions with soil constituents, which would then impact the performance of biochars as soil amendment. For a better understanding on these interactions, two woody biochars of different surface areas (SA) were physically treated with aluminum oxide (Al-oxide) to investigate its potential influence on biochars' sorption property. Both the micropore area and mesopore (17∼500 Å in diameter) area of the low-SA biochar were enhanced by at least 1.5 times after treatment with Al-oxide, whereas the same treatment did not change the surface characteristics of the high-SA biochar due partly to its well-developed porosity. The enhanced sorption of the pesticide isoproturon to the Al-oxide-treated low-SA biochar was observed and is positively related to the increased mesopore area. The desorption hysteresis of pesticide from the low-SA biochar was strengthened because of more pesticide molecules entrapped in the expanded pores by Al-oxide. However, no obvious change of pesticide sorption to the high-SA biochar after Al-oxide treatment was observed, corresponding to its unchanged porosity. The results suggest that the influence of Al-oxide on the biochars' sorption property is dependent on their porosity. This study will provide valuable information on the use of biochars for reducing the bioavailability of pesticides.
authors.affiliation: Yuanpei College, Shaoxing University, Shaoxing, Zhejiang, 312000, China.
authors.forename: Jianxin
authors.initials: J
authors.lastname: Shou
authors.affiliation: Department of Chemistry, Shaoxing University, Huancheng West Road, Shaoxing, Zhejiang, 312000, China. donghuaping@usx.edu.cn.
authors.forename: Huaping
authors.initials: H
authors.lastname: Dong
authors.affiliation: Department of Chemistry, Shaoxing University, Huancheng West Road, Shaoxing, Zhejiang, 312000, China.
authors.forename: Jianfa
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Chemistry, Shaoxing University, Huancheng West Road, Shaoxing, Zhejiang, 312000, China.
authors.forename: Jiaxing
authors.initials: J
authors.lastname: Zhong
authors.affiliation: Department of Chemistry, Shaoxing University, Huancheng West Road, Shaoxing, Zhejiang, 312000, China.
authors.forename: Saijun
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Chemistry, Shaoxing University, Huancheng West Road, Shaoxing, Zhejiang, 312000, China.
authors.forename: Jinhong
authors.initials: J
authors.lastname: Lü
authors.affiliation: Department of Chemistry, Shaoxing University, Huancheng West Road, Shaoxing, Zhejiang, 312000, China.
authors.forename: Yimin
authors.initials: Y
authors.lastname: Li
mesh_terms: D000327:Adsorption; D000537:Aluminum Oxide; D002606:Charcoal / Q000737:chemistry*; D006540:Herbicides / Q000032:analysis; D008956:Models, Chemical; D010575:Pesticides / Q000032:analysis* / Q000737:chemistry; D010671:Phenylurea Compounds; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry; D014934:Wood / Q000737:chemistry
chemical_list: D006540:Herbicides; D010575:Pesticides; D010671:Phenylurea Compounds; D012987:Soil; D012989:Soil Pollutants; C540010:biochar; D002606:Charcoal; C028904:isoproturon; D000537:Aluminum Oxide
keywords: Adsorption; Biochar; Desorption hysteresis; Herbicide; Porosity; Soil oxide