A new type of adsorption material, polypyrrole-modified mushroom residue activated carbon (Ppy-MRAC), was prepared by compounding MR in agricultural waste and Ppy using a dipping method. A characterization analysis indicated that Ppy-MRAC is a mesoporous material, containing functional groups such as hydroxyl (OH⁻) and coordinated chloride (Cl⁻) ions. The efficacy of Ppy-MRAC for removing sulfate (SO₄²⁻) and nitrate (NO₃⁻) from water was studied. The experimental results showed that the adsorption of SO₄²⁻ and NO₃⁻ by Ppy-MRAC followed the Langmuir and pseudo-second-order kinetic models, with maximum adsorption capacities of 40.00 and 51.55 mg/g, respectively. The removal rates of 500 mg/L SO₄²⁻ at 35 °C and 50 mg/L NO₃⁻ at 15 °C were 31.53% and 82.65%, respectively. A thermodynamic analysis revealed adsorption of SO₄²⁻ and NO₃⁻ via spontaneous endothermic and exothermic reactions, respectively. The adsorption mechanisms were mainly electrostatic attraction, ion exchange, and hydrogen bond. The Ppy-MRAC could be regenerated six times after being eluted by NaOH. Low-cost Ppy-MRAC had a high removal rate for inorganic salts in simulated wastewater, and strong environmental and economic benefits.

采用浸渍法将农业废弃物中的MR与Ppy复合制备了一种新型吸附材料聚吡咯改性蘑菇渣活性炭(Ppy-MRAC)。表征分析表明，Ppy-MRAC 是一种介孔材料，含有羟基（OH ^-）和配位氯离子（Cl ^-）等官能团。研究了 Ppy-MRAC从水中去除硫酸盐 (SO ₄ ^2- ) 和硝酸盐 (NO ₃ ^{- ) 的功效。}实验结果表明，SO ₄ ^2-和 NO ₃ ^-的吸附Ppy-MRAC 遵循 Langmuir 和准二级动力学模型，最大吸附容量分别为 40.00 和 51.55 mg/g。500 mg/L SO ₄ ^2-在35 °C 和50 mg/L NO ₃ ^-在15 °C 的去除率分别为31.53% 和82.65%。热力学分析揭示了 SO ₄ ^2-和 NO ₃ ^-的吸附分别通过自发的吸热和放热反应。吸附机理主要是静电吸引、离子交换和氢键。Ppy-MRAC经NaOH洗脱后可再生6次。低成本的Ppy-MRAC对模拟废水中无机盐的去除率高，具有较强的环境效益和经济效益。