Antimony and copper pollution pose significant threat to water quality security, and their advanced treatment is still a great challenge. In this study, we fabricated a hybrid adsorbent (denoted as MO-L-BC) through dispersing manganese oxide (MO) inside a biochar with enlarged pore structure (namely L-BC). The used carrier L-BC possessed a high proportion of large pores (>2 nm) (87%), and thus lowered the diffusion resistance of target pollutants in pore region of MO-L-BC. Consequently, Sb(III) and Cu(II) adsorption onto MO-L-BC achieved equilibrium within 15 min, and their effective coefficients of intra-particle diffusion (D) were calculated to be 8.6 × 10⁻⁸ and 1.5 × 10⁻⁷ cm² s⁻¹, respectively, which were only one-order magnitude lower than that in aqueous phase. XPS analysis indicated that 53.3% of the sorbed Sb(III) was oxidized to Sb(V) by the impregnated MO. Coexisting substances such as HCO₃⁻, SO₄²⁻, NO₃⁻, Ca²⁺, Mg²⁺ and humic acid up to 20 times higher concentration than target contaminants (Sb(III) or Cu(II)) caused only < 20% drop in sorption capacity of MO-L-BC, and the mutual effect of Sb(III) and Cu(II) was also not noticeable. The fixed-bed column adsorption tests showed that MO-L-BC can achieve the tertiary treatment of either the singly polluted (Sb(III) or Cu(II)) or the co-contaminated wastewater at a high flow rate of 0.27 m h⁻¹, with effective treatment volumes larger than400 BV, and the saturated MO-L-BC can be effectively regenerated. MO-L-BC is a promising engineered biochar to treat Sb(III) and/or Cu(II) contaminated water especially under high-flow conditions.

锑和铜污染严重威胁着水质安全，对其进行深度处理仍然是巨大的挑战。在这项研究中，我们通过将氧化锰（MO）分散在具有较大孔结构的生物炭（即L-BC）中来制造混合吸附剂（称为MO-L-BC）。用过的载体L-BC具有较大比例的大孔（> 2 nm）（87％），因此降低了目标污染物在MO-L-BC孔区域的扩散阻力。因此，锑（III）和Cu（II）吸附到MO-L-BC 15分钟内达到平衡，并计算它们的颗粒内扩散（d）的有效系数为8.6×10 ^-8和1.5×10 ^{- 7}厘米² s ^-1分别比水相低一个数量级。XPS分析表明，吸附的MO将53.3％的吸附的Sb（III）氧化为Sb（V）。共存物质如HCO ₃ ^-，SO ₄ ^2-，NO ₃ ^- ，钙²⁺，镁²⁺和腐殖酸高达20倍浓度高于目标污染物（SB（III）或Cu（II））仅引起< MO-L-BC的吸附能力下降20％，并且Sb（III）和Cu（II）的相互作用也不明显。固定床柱吸附试验表明，MO-L-BC可以在0.27 m h的高流速下对单一污染的（Sb（III）或Cu（II））或被共同污染的废水实现三级处理。^-1，有效处理体积大于400 BV，并且可以有效地再生饱和MO-L-BC。MO-L-BC是一种有前途的工程生物炭，可用于处理Sb（III）和/或Cu（II）污染的水，尤其是在高流量条件下。