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Synergistic degradation employing photocatalysis and photo-Fenton process of real industrial pharmaceutical effluent utilizing the Iron-Titanium dioxide composite
Process Safety and Environmental Protection ( IF 7.8 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.psep.2020.11.029
Steffi Talwar , Anoop Kumar Verma , Vikas Kumar Sangal

Abstract The present work focuses on the treatment of real industrial pharmaceutical effluent, utilizing novel composite beads made up of waste foundry sand (FS) and fuller’s earth (FE), both being good source of iron. These composite beads serves as a surface for the coating of TiO2 along withfacilitating the iron leaching, thus leading to the in-situ dual effect of photocatalysis and photo-Fenton. Optimization of various parameters like a number of beads, treatment time, the dosage of H2O2 using batch and the continuous re-circulation mode reactor has been studied in the sunlight. For the batch scale study, the treatment time of 3.65 h, the number of beads as 98 (98 % surface area covered), and H2O2 dose as 800 mg L-1 were came out to be optimized conditions with maximum % COD reduction. The dual effect was effective in eliminating the complex compounds present in the effluent as confirmed through GC-MS analysis along with the significant reduction in (COD) (71%) for batch reactor. The treatment time for the real wastewater was reduced by 60-70 min as compared to the exclusive processes of photo-Fenton and TiO2 photocatalysis. In the continuous recirculation mode, 75% reduction in COD was obtained in 5 h. Further, the bacterial assays proved the disposability of the treated wastewater as per the government regulations. Cost analysis of the overall treatment was also evaluated of the prototype for the complete revelation of the dual process for commercial-scale applications and it was found to be

中文翻译:

铁-二氧化钛复合物对实际工业制药废水的光催化和光-芬顿法协同降解

摘要 目前的工作重点是处理真正的工业制药废水,利用由废铸造砂 (FS) 和漂白土 (FE) 组成的新型复合珠,两者都是铁的良好来源。这些复合珠作为 TiO2 涂层的表面,同时促进铁浸出,从而导致光催化和光芬顿的原位双重效应。已在阳光下研究了各种参数的优化,例如珠数、处理时间、使用批次的 H2O2 剂量和连续再循环模式反应器。对于批量规模研究,处理时间为 3.65 小时、珠数为 98(覆盖的表面积为 98%)和 H2O2 剂量为 800 mg L-1,这些优化条件是 COD 降低百分比最大的优化条件。通过 GC-MS 分析证实,这种双重效应可有效消除流出物中存在的复杂化合物,同时间歇式反应器的 (COD) (71%) 显着降低。与光芬顿和二氧化钛光催化的专有工艺相比,实际废水的处理时间减少了 60-70 分钟。在连续再循环模式下,5 小时内 COD 降低了 75%。此外,根据政府规定,细菌检测证明了处理过的废水的可处理性。还对原型进行了整体处理的成本分析,以完全揭示商业规模应用的双重工艺,发现它是 与光芬顿和二氧化钛光催化的专有工艺相比,实际废水的处理时间减少了 60-70 分钟。在连续再循环模式下,5 小时内 COD 降低了 75%。此外,根据政府规定,细菌检测证明了处理过的废水的可处理性。还对原型进行了整体处理的成本分析,以完全揭示商业规模应用的双重工艺,发现它是 与光芬顿和二氧化钛光催化的专有工艺相比,实际废水的处理时间减少了 60-70 分钟。在连续再循环模式下,5 小时内 COD 降低了 75%。此外,根据政府规定,细菌检测证明了处理过的废水的可处理性。还对原型进行了整体处理的成本分析,以完全揭示商业规模应用的双重工艺,发现它是 根据政府规定,细菌检测证明了处理过的废水是可处理的。还对原型进行了整体处理的成本分析,以完全揭示商业规模应用的双重工艺,发现它是 根据政府规定,细菌检测证明了处理过的废水是可处理的。还对原型进行了整体处理的成本分析,以完全揭示商业规模应用的双重工艺,发现它是
更新日期:2021-02-01
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