Bone char catalyzed dechlorination of trichloroethylene (TCE) by green rust (iron(II)-iron(III) hydroxide, GR) has introduced a promising new reaction platform for degradation of chlorinated solvents. This study aimed to reveal whether a broader class of biochars are catalytically active for the dechlorination reaction and to identify which biochar properties are the most important for the catalytic activity. Biochars produced by pyrolysis of animal, plant, and sewage waste substrates at 950 °C were prepared for catalytic dechlorination of TCE by GR tested in batch experiments with 0.15 g L⁻¹ biochar, 3.2 g L⁻¹ GR, and ~ 20 µM TCE. The results showed that the biochar substrate significantly affects its catalytic activity, with the highest TCE reduction rate observed for bone and shrimp-based biochars (k ≥ 0.18 h⁻¹), whereas no reactivity was seen for graphite and activated carbon references. Multivariate regression indicated that the biochar catalytic activity is controlled by multiple biochar properties - biochar surface area, TCE sorption, abundance of C–O groups, and pore size are the properties that impact the catalytic activity most. Derivation of biochar reactivity relationship for a broad spectrum of biochars provides a new approach for identifying proper biochar catalysts for pollutant degradation.

绿锈（铁（II）-铁（III）氢氧化物，GR）的骨炭催化三氯乙烯（TCE）脱氯引入了一种有前途的新型反应平台，用于降解氯化溶剂。这项研究旨在揭示一类更广泛的生物炭是否对脱氯反应具有催化活性，并确定哪些生物炭特性对催化活性最重要。通过在0.15 g L ^-1生物炭，3.2 g L ^-1分批实验中测试的GR，制备了在950°C的温度下动植物和污水废物底物热解产生的生物炭，用于三氯乙烯的催化脱氯。GR和〜20 µM TCE。结果表明，生物炭基底显著影响其催化活性，以用于基于虾骨和生物炭（观察到的最高TCE减少率ķ  ≥0.18ħ ^-1），而没有反应性被认为对于石墨和活性炭的引用。多变量回归表明，生物炭的催化活性受多种生物炭特性的控制-生物炭表面积，TCE吸附，CO基团的丰度和孔径是影响催化活性最大的特性。广泛的生物炭的生物炭反应性关系的推导提供了一种新的方法，用于确定用于污染物降解的适当生物炭催化剂。