Efficient thermocatalytic and resource utilization of pharmaceutical waste salt

doi:10.16085/j.issn.1000-6613.2024-1121

Abstract

Abstract:

Pharmaceutical salt waste liquor contains high concentrations of recalcitrant organic pollutants, posing significant environmental risks if mismanaged. This study employed hydrothermal oxidation combined with a custom-synthesized metal salt carbonization crystallization catalyst to remediate concentrated sodium acetate waste liquor from a pharmaceutical plant in Jiangsu, China. The effects of reaction temperature, time and catalyst dosage on organic matter removal and sodium acetate retention were evaluated. Under optimal conditions (210℃, 6h, 5g/50mL), a remarkable organic matter removal rate of 93.5% with maintaining a high sodium acetate retention rate of 95.8% was achieved. Fourier transform infrared spectroscopy (FTIR), gas chromatography mass spectrometry (GC-MS) analyses confirmed that the treatment effectively removed toxic and refractory organic contaminants. The recovered sodium acetate salt met industrial reuse standards for chromaticity, COD and heavy metal content. This study demonstrated the potential of thermocatalytic treatment as a sustainable solution for mitigating the environmental hazards of pharmaceutical salt waste, enabling resource recovery and promoting sustainable development within the pharmaceutical industry.

Key words: pharmaceutical waste salt, thermocatalytic, recovery, waste treatment, sustainability

摘要：

制药废盐母液中含有高浓度、难降解有机污染物，被列为危险废物，处理不当会对环境造成严重危害。本研究开发了一种高效、低成本的制药废盐资源化处理技术，采用水热氧化法，结合自制的金属盐碳化结晶剂，对江苏某制药厂的高浓度乙酸钠废盐母液进行热催化处理，探究了反应温度、时间和催化剂投加量对母液中有机物去除率及乙酸钠保留率的影响。结果表明，在210℃、6h、催化剂投加量为5g/50mL的最佳条件下，母液中有机物去除率高达93.5%，同时乙酸钠保留率为95.8%。经傅里叶红外光谱仪（FTIR）、气相色谱质谱联用仪（GC-MS）等分析表明，热催化处理后，母液中的吡啶类等有毒有害有机污染物被有效去除，所得乙酸钠回收盐的色度、化学需氧量（COD）、重金属等指标均达到企业回用标准。本研究提出的热催化处理技术可有效降低制药废盐的环境风险，并实现资源化利用，为制药行业的可持续发展提供新思路。

关键词: 制药废盐, 热催化, 资源回收, 废物处理, 可持续性

CLC Number:

X787

LU Ling, YU Lei, GU Xia, LAI Minming, ZHOU Kai, WANG Yapeng, LI Xiang. Efficient thermocatalytic and resource utilization of pharmaceutical waste salt[J]. Chemical Industry and Engineering Progress, 2025, 44(9): 5432-5441.

鲁玲, 俞磊, 顾霞, 赖敏明, 周凯, 王亚鹏, 李响. 制药废盐的高效热催化处理及资源化利用[J]. 化工进展, 2025, 44(9): 5432-5441.

Figures/Tables 15

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