Purpose

The 2, 4, 6-trinitrotoluene (TNT) is the major explosive extensively applied in demolition of structure, military activity, and mining industry. This research was investigating the degradation rate of TNT in aqueous solution using electrochemical combined with persulfate anions.

Methods

In this study, the effect of seven independent variables including pH, reaction time, current density, type (NaCl, Na₂SO₄, NaNO₃) and concentration of salts, initial concentration of TNT, scavenger type, and persulfate concentration were studied on TNT removal. High performance liquid chromatography (HPLC) was applied to measure TNT concentration.

Results

The findings indicated that the optimum conditions for TNT reduction were pH = 5, time = 45 min, current density = 1.75 mA/cm², initial concentration of TNT = 25 mg/l, persulfate concentration = 0.3 mg/l, and Na₂SO₄ concentration = 1.75 mg/l which the removal rate of TNT was found to be 88.0 ± 4.4%.

Conclusion

According to the findings, electrocoagulation procedure is suggested as an applicable method in TNT reduction from aqueous solution.

中文翻译：

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过硫酸盐耦合电凝聚法降解水溶液中的 2, 4, 6-三硝基甲苯 (TNT)

目的

2, 4, 6-三硝基甲苯（TNT）是一种主要的炸药，广泛应用于结构拆除、军事活动和采矿业。本研究使用电化学结合过硫酸根阴离子研究 TNT 在水溶液中的降解速率。

方法

在本研究中，研究了 pH、反应时间、电流密度、类型（NaCl、Na ₂ SO ₄、NaNO ₃）和盐浓度、TNT 初始浓度、清除剂类型和过硫酸盐浓度等7 个自变量的影响。 TNT 移除。高效液相色谱法 (HPLC) 用于测量 TNT 浓度。

结果

结果表明，还原 TNT 的最佳条件为 pH = 5，时间 = 45 min，电流密度 = 1.75 mA/cm ²，TNT 初始浓度 = 25 mg/l，过硫酸盐浓度 = 0.3 mg/l，Na ₂ SO ₄浓度= 1.75 mg/l，发现TNT的去除率为88.0 ± 4.4%。

结论

根据研究结果，建议电凝程序作为从水溶液中减少 TNT 的适用方法。