Electrolysis manganese slag produced in industrial manganese production causes massive leachate containing heavy metal Mn²⁺ and inorganic NH₄⁺-N, which causes serious hazard to the water body and soil. A cost-effective alternative to address the multiple pollution is urgently needed. This study investigated the synergy of grapefruit peel biochar (BC) and strain AL-6 to remediate Mn²⁺ and NH₄⁺-N in sequencing batch bioreactor (SBR) and soil column. The results showed that, in SBR, under the condition of C/N 5, temperature 30°C, BC and strain AL-6 showed fabulous performance to remove Mn²⁺ (99.3%) and NH₄⁺-N (97.7%). The coexisting ions Mg²⁺ and Ca²⁺ had no effects on the removal of Mn²⁺ and COD, however, 23.3% removal efficiency of NH₄⁺-N was curtailed. Characterization found that the presence of MnCO₃ confirmed the adsorption of Mn²⁺ by functional groups action, and gas chromatography indicated that BC and strain AL-6 promoted the reduction of N₂O and organic carbon. In addition, BC and strain AL-6 helped to immobilize 799.41 mg L⁻¹ of Mn²⁺ and 320 mg L⁻¹ of NH₄⁺-N after 45 d in the soil column. And the determination of TOC, CEC, pH, Eh, soil enzymatic activity (catalase and urease), and microbial diversity and abundance confirmed that BC and strain AL-6 increased the soil fertility and bioavailability of pollutants. Totally, BC and strain AL-6 possess great potential to remediate Mn²⁺ and NH₄⁺-N pollution in water and soil.

工业锰生产中产生的电解锰渣产生大量含有重金属Mn ²⁺和无机NH ₄ ⁺ -N的渗滤液，对水体和土壤造成严重危害。迫切需要一种具有成本效益的替代方案来解决多重污染。本研究探讨了葡萄柚皮生物炭 (BC) 和菌株 AL-6在序批式生物反应器 (SBR) 和土壤柱中修复 Mn ²⁺和 NH ₄ ^{+ -N 的协同作用。}结果表明，在SBR中，在C/N 5 、温度30℃的条件下，BC和菌株AL-6对Mn ²⁺（99.3%）和NH ₄ ⁺ -N（97.7%）表现出极好的去除效果。 . 共存离子 Mg²⁺和Ca ^{2+对Mn 2+}和COD的去除没有影响，但是NH ₄ ⁺ -N的去除效率降低了23.3%。表征发现MnCO ₃的存在证实了Mn ²⁺通过官能团的作用吸附，气相色谱表明BC和菌株AL-6促进了N ₂ O和有机碳的还原。此外，BC和菌株AL-6有助于固定799.41 mg L ^-1的Mn ²⁺和320 mg L ^-1的NH ₄ ⁺-N 在土柱中 45 d 后。TOC、CEC、pH、Eh、土壤酶活性（过氧化氢酶和脲酶）以及微生物多样性和丰度的测定证实BC和菌株AL-6提高了土壤肥力和污染物的生物有效性。总之，BC和AL-6菌株在修复水和土壤中的Mn ²⁺和NH ₄ ^{+ -N污染方面具有很大的潜力。}