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Quantitative evaluation of relationships between adsorption and partition of atrazine in biochar-amended soils with biochar characteristics

机译：具有生物炭特征的生物炭改良土壤中r去津吸附与分配关系的定量评估

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Atrazine (ATZ) adsorption in two natural soils amended with biochars produced from different feedstocks at 300, 500, and 700 °C were investigated; further, the relationships between the surface and partition adsorption capacities of ATZ in biochar-amended soils with biochar characteristics were quantitatively evaluated. The results revealed that high aromaticity, hydrophobicity, and low polarity of biochar facilitated ATZ adsorption. The addition of selected biochars significantly increased the adsorption of ATZ on paddy soil (PS) and black soil (BS) by 5.2–7.5 times and 2.3–4.2 times, respectively. On the contrary, the degree of increase in surface adsorption was much higher than that in partition adsorption, mainly due to the role of the specific adsorption of ATZ on biochar. Meanwhile, the respective contributions of surface and partition adsorptions to the total ATZ adsorption on biochar-amended soil changed with different addition amounts of biochar. The multiple nonlinear regression analysis demonstrated the linear dependence of H/C ratio, (O + N)/C ratio, and specific surface area (SSA) of biochar on the surface adsorption capacity of biochar-amended PS and BS, as well as the linear dependence of organic carbon and ash contents on the partition adsorption capacity of biochar-amended PS and the linear dependence of the H/C ratio and SSA on the partition adsorption capacity of biochar-amended BS. In biochar-amended soil systems, interactions between biochar and soil could affect ATZ adsorption, and organic matter in biochar might compensate for the role of soil organic matter in the competition for adsorption sites with a decrease in the biochar pyrolysis temperature.
机译：研究了在300、500和700°C下，用不同原料生产的生物炭对两种天然土壤中adsorption去津（ATZ）的吸附;此外，定量评估了具有生物炭特性的生物炭改良土壤中ATZ的表面和分区吸附能力之间的关系。结果表明，高芳香性，疏水性和低生物极性促进了ATZ的吸附。精选生物炭的添加显着提高了ATZ在水稻土（PS）和黑土（BS）上的吸附，分别提高了5.2-7.5倍和2.3-4.2倍。相反，表面吸附的增加程度远高于分区吸附的增加程度，这主要是由于ATZ在生物炭上的特异性吸附作用。同时，随着生物炭添加量的不同，表面和分区吸附对生物炭改性土壤上总ATZ吸附的贡献也发生了变化。多元非线性回归分析表明，H / C比，（O + N）/ C比和生物炭比表面积对生物炭改性的PS和BS的表面吸附能力具有线性关系。有机碳和灰分含量对生物炭改性的PS的分区吸附容量的线性依赖性以及H / C比和SSA对生物炭改性的BS的分区吸附容量的线性依赖性。在经过生物炭改良的土壤系统中，生物炭与土壤之间的相互作用可能会影响ATZ的吸附，而生物炭中的有机质可能会随着生物炭的热解温度降低而补偿土壤有机质在吸附位竞争中的作用。

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