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A new activated carbon prepared from cypress cones and its application in the COD reduction and colour removal from industrial textile effluent
Environment, Development and Sustainability ( IF 4.9 ) Pub Date : 2020-08-20 , DOI: 10.1007/s10668-020-00944-2
Meryem Khellouf , Rachida Chemini , Zineb Salem , Mohamed Khodja , Djamel Zeriri , Amane Jada

A new activated carbon from local cypress cones (CCAC) was prepared using phosphoric acid as a chemical activating agent. It presented a Brunauer, Emmett and Teller surface area (SBET) equal to 379.5117 ± 2.3509 m2 g−1 with an amorphous nature. Scanning electron microscopy analysis revealed a heterogeneous and random shape of pores. The reduction in colour and chemical oxygen demand (COD) from the industrial aqueous effluent from the textile company “COTITEX” was the principal performance study of the resulting material. The kinetic data of the adsorption process obeyed a pseudo-second-order model with R2 of 0.988. From five studied parameters, only the initial COD concentration, the pH and the temperature influenced the COD reduction at equilibrium. Maximum COD and colour removal, respectively, 19% and 80.4% were recorded under optimal adsorption conditions of 2 g L−1 of the adsorbent amount, 323°K of operating temperature, pH = 11 and a stirring speed = 300 rpm. The present study showed that CCAC could be a proper material for coloured effluent treatment, whereas, for a better COD reduction, pretreatment is required.

中文翻译:

丝柏锥体制备的新型活性炭及其在工业纺织废水COD减量和脱色中的应用

使用磷酸作为化学活化剂制备了一种来自本地柏树锥体 (CCAC) 的新型活性炭。它呈现出布鲁诺尔、埃米特和特勒表面积 (SBET) 等于 379.5117 ± 2.3509 m2 g-1,具有无定形性质。扫描电子显微镜分析揭示了孔的异质和随机形状。来自纺织公司“COTITEX”的工业废水的颜色和化学需氧量 (COD) 的降低是所得材料的主要性能研究。吸附过程的动力学数据服从 R2 为 0.988 的准二级模型。从五个研究参数来看,只有初始 COD 浓度、pH 值和温度会影响平衡时的 COD 减少。最大 COD 和颜色去除率分别为 19% 和 80。在 2 g L−1 吸附剂量、323°K 操作温度、pH = 11 和搅拌速度 = 300 rpm 的最佳吸附条件下记录了 4%。目前的研究表明,CCAC 可能是处理有色废水的合适材料,而为了更好地降低 COD,需要进行预处理。
更新日期:2020-08-20
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