This study was focused on the synthesis of activated carbon from a waste tire and the enhancement of its specific area by a demineralization technique that can be used for the removal of methylene blue dye (MB). Maximum MB removal (89.41%) was attained at an impregnation ratio value of 0. A maximum yield (42.65%) was found at 48 h. Waste tire-based activated carbon (WTAC)'s ability to remove MB was increased by large values up to an impregnation time of 24 h. WTAC has a maximum MB removal of 90.13% at 4 M of KOH. The sample had a surface area of 53 m²/g. This sample was demineralized by using NaOH and H₂SO₄ in a 1 : 1 ratio, and the surface area was enhanced to 257 m²/g. In the demineralization process, a massive decrement of metals from the waste was seen; for each metal, namely, Zn²⁺, Al³⁺, Ca²⁺, and Mg²⁺, 43.79%, 32.45%, 27.95%, and 6.843% reductions were achieved, respectively. After this process, the maximum removal of MB was found at 1.2 g adsorbent dosage, 120 min, pH 8, the temperature of 20°C, and an initial dye concentration of 10 mg/L. The adsorption mechanism revealed that the process of adsorption happens at a specific site of homogeneous adsorption on the surface of the adsorbent. The kinetics study showed that the adsorption process of the dye is mainly affected by the chemical reaction.

中文翻译：

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脱矿技术和亚甲基蓝吸附提高废轮胎基活性炭的比表面积

这项研究的重点是从废轮胎合成活性炭，并通过可用于去除亚甲基蓝染料 (MB) 的脱矿技术提高其比表面积。最大 MB 去除率 (89.41%) 在浸渍比值为 0 时达到。最大产率 (42.65%) 在 48 小时时发现。废轮胎基活性炭 (WTAC) 去除 MB 的能力大幅提高，浸渍时间达到 24 小时。WTAC 在 4 M KOH 下的最大 MB 去除率为 90.13%。该样品具有53m ² /g的表面积。该样品使用 NaOH 和 H ₂ SO ₄以 1 : 1 的比例脱盐，表面积提高到 257 m ²/G。在脱盐过程中，可以看到废物中的金属大量减少；对于每种金属，即 Zn ²⁺、Al ³⁺、Ca ²⁺和 Mg ²⁺，分别实现了 43.79%、32.45%、27.95% 和 6.843% 的还原。在此过程之后，在 1.2 g 吸附剂用量、120 分钟、pH 8、温度 20°C 和初始染料浓度 10 mg/L 时发现 MB 的最大去除。吸附机理揭示了吸附过程发生在吸附剂表面均匀吸附的特定位点。动力学研究表明，染料的吸附过程主要受化学反应的影响。