掺氮-棕榈油厂出水污泥-生物炭作为过硫酸氢盐活化剂对亚甲基蓝染料环保性去除的影响

Aida Humaira Sallehuddin, Sabrina Karim, Mohamad Ali Ahmad, Woei Yenn Tong, Noor Aina Mohd Nazri
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引用次数: 0

摘要

由染料引起的水污染是一个主要问题,因为它是一种有毒的化学物质,当接触到人类和水生栖息地时,会导致慢性疾病。以过硫酸氢盐(PDS)为基础的硫酸盐基深度氧化法在实现废水颜色降解方面受到了广泛关注。过渡金属基均相/非均相催化剂已被证明是活化过硫酸盐的良好选择。尽管如此,由于金属浸出,这会导致严重的二次污染。另外,氮掺杂生物炭由于其成本较低且更环保,是一种很有前途的非金属过硫酸盐活化剂。方法:从棕榈油厂废水(POME)污泥中掺入尿素、氯化铵和三聚氰胺作为氮源,在700℃热解工艺下合成生物炭,并用于活化PDS。将合成的POME生物炭的含氮量分别调整为25:75、50:50和75:25。然后进行了间歇降解实验,以确定催化脱除亚甲基蓝(MB)染料的可行性。结果:基于实验结果,与氯化铵和三聚氰胺掺杂的生物炭相比,尿素掺杂的生物炭对MB的去除效果更好。此外,较高的氮炭比显著提高了MB的降解。当使用较高的尿素掺杂生物炭用量时,也显示出类似的趋势。利用5.0 g尿素掺杂生物炭,MB的降解率为100±0.7%。结论:本研究为污泥回收制备碳基催化剂活化PDS提供了一种有效的方法,并提高了生物炭对n掺杂去除MB染料的催化性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Nitrogen-doped − Palm Oil Mill Effluent Sludge-biochar as Peroxydisulfate Activator on the Removal of Methylene Blue Dye as an Environmental-friendly Approach
Introduction: Water pollution caused by dyes is a major problem as it is a toxic chemical that can cause chronic diseases when exposed to humans and aquatic habitats. Sulfate-based advanced oxidation process based on peroxydisulfate (PDS) has received a lot of attention recently for achieving color degradation in wastewater. Transition metal-based homogeneous/heterogeneous catalysts have shown to be a good alternative for the activation of persulfate. Nonetheless, this leads to significant secondary contamination due to metal leaching. Alternatively, nitrogen-doped biochar is a promising non-metal persulfate activator due to its lower cost and more environmentally friendly. Methods: Biochar from Palm Oil Mill Effluent (POME) sludge doped with nitrogen source of urea, ammonium chloride, and melamine was synthesized at a 700°C pyrolysis process and used to activate PDS. The nitrogen content of synthesized POME biochar was altered to ratios of 25:75, 50:50, and 75:25 respectively. Batch degradation experiments were then conducted to determine the feasibility of catalytic removal of methylene blue (MB) dye. Results: Based on experimental results, urea-doped biochar showed a greater MB removal compared to ammonium chloride and melamine-doped biochar. Besides that, higher nitrogen-to-biochar ratio increases the MB degradation significantly. A similar trend was demonstrated when a higher urea-doped biochar dosage was utilized. By utilizing 5.0 g of urea-doped biochar, a 100 ± 0.7% degradation of MB was achieved. Conclusion: This research provides an effective method to produce carbon-based catalysts from sludge recovery for activation of PDS, also enhancing the catalytic performance of biochar on MB dye removal by N-doping.
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来源期刊
CiteScore
0.50
自引率
0.00%
发文量
28
期刊介绍: The Malaysian Journal of Medicine and Health Sciences (MJMHS) is published by the Faculty of Medicine and Health Sciences, Universiti Putra Malaysia. The main aim of the MJMHS is to be a premier journal on all aspects of medicine and health sciences in Malaysia and internationally. The focus of the MJMHS will be on results of original scientific research and development, emerging issues and policy analyses pertaining to medical, biomedical and clinical sciences.
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