It is challenging to efficiently remove arsenate (As(Ⅴ)) and chromate (Cr(Ⅵ)) simultaneously. Herein, ordered mesoporous carbon (OMC) was fabricated with averaged pore diameter of 6.5 nm and surface area of 997 m² g⁻¹. Zerovalent iron (ZVI) impregnation reduced surface area of ZVI/OMC (432 m² g⁻¹) and increased I_D/I_G ratio by 13%. Maximal Cr(Ⅵ) and As(Ⅴ) sorption capacities at pH 3 were 0.66 and 0.019 mmol g⁻¹ by OMC, and 0.71 and 0.39 mmol g⁻¹ by ZVI/OMC, respectively. Reduction accounted for over 55% for Cr(Ⅵ) and As(Ⅴ) removal followed by complexation and precipitation. Better ZVI/OMC performance was ascribed to higher electron transfer rate and lower electrical resistance than OMC as per electrochemical analysis. Upon Cr(Ⅵ) introduction, As(Ⅴ) removal increased to 0.28 mmol kg⁻¹ by OMC, but decreased to 0.16 mmol kg⁻¹ by ZVI/OMC. OMC could preferably reduce CrO₄²⁻ to Cr³⁺ by hydroxyl group, which enhanced its zeta potential facilitating As(Ⅴ) sorption. Regarding ZVI/OMC, Fe⁰ and Fe oxide in ZVI/OMC exhibited better affinity to As(Ⅴ), but the competition for the similar active sites resulted in compromised As(Ⅴ) and Cr(Ⅵ) removal. Thus, the novel OMC is advantageous for removal of binary As(Ⅴ) and Cr(Ⅵ), but ZVI/OMC is robust to detoxify single heavy metal.

同时有效地去除砷酸盐（As（Ⅴ））和铬酸盐（Cr（Ⅵ））具有挑战性。在此，制造了平均孔径为6.5nm，表面积为997m ² g ^-1的有序介孔碳（OMC）。零价铁（ZVI）浸渍可减少ZVI / OMC的表面积（432 m ² g ^-1），并使I _D / I _G比增加13％。最大的Cr（Ⅵ）和As（Ⅴ）在pH为3的吸附容量分别为0.66和0.019毫摩尔克^-1由OMC，和0.71和0.39毫摩尔克^-1由ZVI / OMC分别提供。还原占去除Cr（Ⅵ）和As（Ⅴ）的55％以上，然后络合和沉淀。根据电化学分析，与OMC相比，更好的ZVI / OMC性能归因于更高的电子传输速率和更低的电阻。引入Cr（Ⅵ）后，OMC去除的As（Ⅴ）增加到0.28 mmol kg ^-1，而ZVI / OMC去除的As（Ⅴ）减少到0.16 mmol kg ^-1。OMC优选可以通过羟基将CrO ₄ ^2-还原为Cr ³⁺，从而增强其ζ电位，从而促进As（Ⅴ）的吸附。关于ZVI / OMC，Fe ⁰ZVI / OMC中的Fe和Fe表现出更好的对As（Ⅴ）的亲和力，但对相似活性位的竞争导致As（Ⅴ）和Cr（Ⅵ）的去除受到损害。因此，新型OMC有利于去除二元As（Ⅴ）和Cr（Ⅵ），但ZVI / OMC能够对单个重金属进行解毒。