Dosage- and site-dependent retention of black carbon and polycyclic aromatic hydrocarbons in farmland soils via long-term biochar addition

The supplementary material contains descriptions of the methods and relevant parameters of health risk assessment about polycyclic aromatic hydrocarbons, elemental composition of soil and biochar, contents of benzene polycarboxylic acid (BPCA) species and polycyclic aromatic hydrocarbon (PAH) species in the soil and biochar, scanning electron microscopy (SEM) image of fresh biochar, ontents of black carbon (BCBPCA), benzene polycarboxylic acid (BPCA) species, 18 polycyclic aromatic hydrocarbons (18PAHs) and polycyclic aromatic hydrocarbon (PAH) species in biochar.

本补充材料涵盖以下内容：多环芳烃（polycyclic aromatic hydrocarbons）健康风险评估的方法及相关参数说明、土壤与生物炭的元素组成、土壤和生物炭中苯多羧酸（benzene polycarboxylic acid, BPCA）组分与多环芳烃（polycyclic aromatic hydrocarbons, PAH）组分的含量、新鲜生物炭的扫描电子显微镜（scanning electron microscopy, SEM）图像，以及生物炭中黑碳（BCBPCA）、苯多羧酸（BPCA）组分、18种多环芳烃（Σ18PAHs）及多环芳烃（PAH）组分的含量。