Adsorption of deoxyribonucleic acid (DNA) by willow wood biochars produced at different pyrolysis temperatures

被引：25

作者：

Wang, Congying ^{[1
]}

Wang, Tao ^{[2
]}

Li, Wenbin ^{[3
]}

Yan, Jifeng ^{[1
]}

Li, Zengbo ^{[3
]}

Ahmad, Riaz ^{[4
]}

Herath, Saman K. ^{[2
,5
]}

Zhu, Na ^{[1
]}

机构：

[1] Shanxi Univ, Sch Environm Sci & Resources, Taiyuan 030006, Peoples R China

[2] Massey Univ, New Zealand Biochar Res Ctr, Palmerston North 4442, New Zealand

[3] Taiyuan Univ Sci & Technol, Sch Chem & Biol Engn, Taiyuan 030021, Peoples R China

[4] Pir Mehr Ali Shah Arid Agr Univ, Dept Soil Sci & Soil Water Conservat, Rawalpindi, Pakistan

[5] Uva Wellassa Univ, Fac Anim Sci & Export Agr, Dept Export Agr, Badulla 9000, Sri Lanka

来源：

BIOLOGY AND FERTILITY OF SOILS | 2014年 / 50卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Willow biochar; Ionic conditions; Specific surface area; Micropore surface area; Adsorption isotherms; BASIC DYE ADSORPTION; EXTRACELLULAR DNA; CLAY-MINERALS; COLLOIDAL PARTICLES; ACTIVATED CARBON; BACTERIAL-DNA; SOIL; PERSISTENCE; KINETICS; SILICA;

D O I：

10.1007/s00374-013-0836-0

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Adsorption of DNA by biochars was investigated in the present study. Biochars were produced from air-dried willow wood chips at 300, 400, 500, and 600 A degrees C under limited oxygen supply. The resulting products, referred to as BC300, BC400, BC500, and BC600, respectively, were characterized for their elemental composition, cation exchange capacity (CEC), specific surface areas (SSA), and microporosity. According to a Langmuir isotherm, maximum DNA adsorption capacity of biochars was ranked as BC500 > BC600 > BC400 > BC300. Increasing solution pH (from 4.0 to 9.0) faintly decreased DNA adsorption onto biochars. The addition of Na+, Mg2+, and Ca2+ slightly increased the adsorption of DNA, and the effect decreased by increasing the pyrolysis temperature of biochars, indicating that electrostatic interaction was not the main driving force for DNA adsorption onto those biochars. Correlation analysis showed that SSA and micropore surface area were the main factors influencing DNA adsorption on biochars.

引用

页码：87 / 94

页数：8