The performance of groundwater treatment waste (GWTW) as an adsorbent and catalyst in the decoloration of aluminum dye Sanodure green LWN (SG) solution was investigated. The raw GWTW was more suitable for dye removal than calcined at 800 °C temperature. The catalytic activity of GWTW in Fenton-like reactions in sunlight increases with decreasing pH from 5.5 to 2.5 and increasing temperature from 20 to 60 °C. The rate of 70% decoloration in the first 5 min and 92% after 50 min of 100 mg/L SG dye solution was reached at 50 °C and pH 3. Kinetics of the SG dye color removal fitted well with the double exponential and two-stage pseudo-first-order kinetic models. The activation energy of the first stage of the SG dye degradation reaction is 30.45 kJ/mol. GWTW could be re-used for the pre-treatment of dye-contaminated wastewater before entering the wastewater treatment plant.

中文翻译：

---

地下水处理废物去除铝染料中吸附和催化氧化的联合作用

研究了地下水处理废物（GWTW）作为吸附剂和催化剂在铝染料Sanodure绿LWN（SG）溶液脱色中的性能。粗 GWTW 比在 800 °C 温度下煅烧更适合染料去除。GWTW 在阳光下类芬顿反应中的催化活性随着 pH 从 5.5 降低到 2.5 和温度从 20 升高到 60°C 而增加。在 50 °C 和 pH 3 条件下，100 mg/L SG 染料溶液的前 5 分钟脱色率为 70%，50 分钟后脱色率为 92%。SG 染料脱色动力学与双指数和二-阶段伪一级动力学模型。SG染料降解反应第一阶段的活化能为30.45 kJ/mol。