The sources of benzopyrene in vegetable oil mainly include: raw material pollution, hightemperatureleaching and hightemperature roasting.
植物油中苯并芘的来源主要包括：原料污染、高温浸出和高温焙炒。
2
The new process has advantages of high zinc leaching rate, short flowsheet, leaching at normal temperature and pressure and no waste solution, suggesting a wide application field and good prospect.
新工艺锌浸出率高，流程短，可在常温常压下浸出，无废液，具有较广阔的应用前景。
3
These may provide some thermodynamic data for high-temperature oxidation pressure leaching of ores containing In2S3.