In Fenton-like oxidation processes, the use of biochar (BC) as support material for the nanoscale zero valent iron-nickel (nZVI-Ni) bimetallic particles attained much attention to activate persulfate (PS) for TCE degradation in aqueous medium. In present work, nZVI-Ni@BC particles with nZVI-Ni to BC mass ratio of 1:5 exhibited excellent results (> 99 % ± 0.24) for TCE degradation. The physico-chemical characteristics, surface morphologies, and elemental mapping of the synthesized nZVI-Ni@BC particles investigated through SEM, EDX, TEM, XPS, XRD, BET and FTIR spectroscopy. For the nZVI-Ni@BC-persulfate system, the effects of PS concentration, initial pH, inorganic ions and natural organic matter (NOM) on TCE degradation were evaluated. Batch experiments revealed that complete removal of TCE (> 99 % ± 0.25) was attained at 250 mg L⁻¹ of nZVI-Ni@BC and 4.0 mM PS dosages at pH 3.49 ± 0.55. Scavenging and electron paramagnetic resonance (EPR) verified the dominant role of both SO₄ˉ and OH radicals in acidic environment for degradation of TCE. Moreover, high level of carbonate, bicarbonates and NOM inhibited the overall TCE oxidation reaction. In summary, these results suggested that nZVI-NI@BC composite was an alternative, economic and promising catalyst for the activation of PS to degrade chlorinated contaminants in aqueous medium.

在类似芬顿的氧化过程中，使用生物炭（BC）作为纳米级零价铁镍（nZVI-Ni）双金属颗粒的载体材料引起了人们对于激活过硫酸盐（PS）活化TCE在水性介质中降解的关注。在目前的工作中，nZVI-Ni与BC的质量比为1：5的nZVI-Ni @ BC颗粒显示出优异的TCE降解结果（> 99％±0.24）。通过SEM，EDX，TEM，XPS，XRD，BET和FTIR光谱研究了合成的nZVI-Ni @ BC颗粒的理化特性，表面形态和元素图谱。对于nZVI-Ni @ BC-过硫酸盐体系，评估了PS浓度，初始pH，无机离子和天然有机物（NOM）对TCE降解的影响。批处理实验表明，在250 mg L时，可以完全去除TCE（> 99％±0.25）在pH 3.49±0.55下，^-1的nZVI-Ni @ BC和4.0 mM PS剂量。清除和电子顺磁共振（EPR）证实了酸性环境中SO ₄ radical和OH自由基对TCE降解的主导作用。此外，高含量的碳酸盐，碳酸氢盐和NOM抑制了整个TCE氧化反应。总之，这些结果表明，nZVI-NI @ BC复合材料是活化PS降解水性介质中氯化污染物的一种替代，经济且有希望的催化剂。