Agro-waste biosorbents: Effect of physico-chemical properties on atrazine and imidacloprid sorption

被引:19
|
作者
Mandal, Abhishek [1 ]
Singh, Neera [1 ]
Nain, Lata [2 ]
机构
[1] ICAR Indian Agr Res Inst, Div Agr Chem, New Delhi, India
[2] ICAR Indian Agr Res Inst, Div Microbiol, New Delhi, India
关键词
Agro-waste; physico-chemical properties; imidacloprid; atrazine; sorption; LOW-COST; PESTICIDES; REMOVAL; WATER; SOIL; ADSORBENTS; ADSORPTION; BIOCHARS; STRAW;
D O I
10.1080/03601234.2017.1331677
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Low cost agro-waste biosorbents namely eucalyptus bark (EB), corn cob (CC), bamboo chips (BC), rice straw (RS) and rice husk (RH) were characterized and used to study atrazine and imidacloprid sorption. Adsorption studies suggested that biosorbents greatly varied in their pesticide sorption behaviour. The EB was the best biosorbent to sorb both atrazine and imidacloprid with K-F values of 169.9 and 85.71, respectively. The adsorption isotherm were nonlinear in nature with slope (1/n) values <1. The Freundlich constant Correlating atrazine/imidacloprid sorption parameter [K-F.(1/n)] with the physicochemical properties of the biosorbents suggested that atrazine adsorption correlated significantly to the aromaticity, polarity, surface area, fractal dimension, lacunarity and relative C-O band intensity parameters of biosorbents. Probably, both physisorption and electrostatic interactions were responsible for the pesticide sorption. The eucalyptus bark can be exploited as low cost adsorbent for the removal of these pesticides as well as a component of on-farm biopurification systems.
引用
收藏
页码:671 / 682
页数:12
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