Zielińska Anna, Oleszczuk Patryk
Department of Environmental Chemistry, Faculty of Chemistry, 3 Maria Curie-Skłodowska Square, 20-031 Lublin, Poland.
Department of Environmental Chemistry, Faculty of Chemistry, 3 Maria Curie-Skłodowska Square, 20-031 Lublin, Poland.
Chemosphere. 2016 Jun;153:68-74. doi: 10.1016/j.chemosphere.2016.02.118. Epub 2016 Mar 21.
The aim of this study was to evaluate the effect of sewage sludge pyrolysis on freely dissolved (Cfree) polycyclic aromatic hydrocarbon (PAH) contents in biochars. Four sewage sludges with varying properties and PAH contents were pyrolysed at temperatures of 500 °C, 600 °C or 700 °C. Cfree PAH contents were determined using polyoxymethylene (POM). The contents of Cfree PAHs in the sludges ranged from 262 to 294 ng L(-1). Sewage sludge-derived biochars have from 2.3- to 3.4-times lower Cfree PAH contents comparing to corresponding sewage sludges. The Cfree PAH contents in the biochars ranged between 81 ng L(-1) and 126 ng L(-1). As regards agricultural use of biochar, the lower contents of Cfree PAHs in the biochars compared to the sewage sludges makes biochar a safer material than sewage sludge in terms of PAH contents.
本研究的目的是评估污水污泥热解对生物炭中自由溶解态（Cfree）多环芳烃（PAH）含量的影响。对四种性质和PAH含量各异的污水污泥在500℃、600℃或700℃的温度下进行热解。使用聚甲醛（POM）测定Cfree PAH含量。污泥中Cfree PAH的含量范围为262至294 ng L(-1)。与相应的污水污泥相比，污水污泥衍生的生物炭中Cfree PAH含量低2.3至3.4倍。生物炭中Cfree PAH的含量在81 ng L(-1)至126 ng L(-1)之间。就生物炭的农业用途而言，与污水污泥相比，生物炭中较低的Cfree PAH含量使得生物炭在PAH含量方面比污水污泥更安全。
