The Mechanism of Arsenic Release in Contaminated Paddy Soil with Added Biochar: The Role of Dissolved Organic Matter, Fe, and Bacteria

Toxics, Год журнала: 2024, Номер 12(9), С. 661 - 661

Опубликована: Сен. 10, 2024

The addition of biochar inevitably modifies the acidity (pH), redox potential (Eh), and dissolved organic matter (DOM) level in soil. These alterations also have coupled effects on cycling iron (Fe) composition bacterial communities, thereby impacting speciation availability arsenic (As) This study explored mechanisms through which affects As paddy soil during flooded cultivation with different pyrolysis temperature biochars (300 °C, 400 500 °C) added. results revealed that TAs concentration increased initial 15 days SBC300 or SBC400 because increasing DOM induced mobility though formation As-DOM complexes. Meanwhile, elevated pH, decreased Eh, promoted transformation specific adsorbed (A-As) amorphous oxide-bound (Amo-Fe-As) to supernatant enhancing reductive dissolution Fe(oxy)(hydr)oxides. Moreover, altered relative abundance (V)-reducing bacteria (such as

Язык: Английский

Efficient catalytic oxidation of xylose to formic acid with the oxygen vacancies of CeO2 promoted the vanadium catalysts anchored on biochar

Chemical Engineering Journal, Год журнала: 2024, Номер 501, С. 157538 - 157538

Опубликована: Ноя. 8, 2024

Язык: Английский