PDF(Pubmed)
Abstract：
The progressive decline of the coal industry necessitates the development of effective treatment solutions for acid mine drainage (AMD), which is characterized by high acidity and elevated concentrations of heavy metals. This study proposes an innovative approach leveraging sulfate-reducing bacteria (SRB) acclimated to contaminated anaerobic environments. The research focused on elucidating the physiological characteristics and optimal growth conditions of SRB, particularly in relation to the pH level and temperature. The experimental findings reveal that the SRB exhibited a sulfate removal rate of 88.86% at an optimal temperature of 30 °C. Additionally, SRB gel particles were formulated using sodium alginate (SA) and carboxymethyl cellulose (CMC), and their performance was assessed under specific conditions (pH = 6, C/S = 1.5, T = 30 °C, CMC = 4.5%, BSNa = 0.4 mol/L, and cross-linking time = 9 h). Under these conditions, the SRB gel particles demonstrated an enhanced sulfate removal efficiency of 91.6%. Thermal analysis via differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) provided further insights into the stability and properties of the SRB gel spheres. The findings underscore the potential of SRB-based bioremediation as a sustainable and efficient method for AMD treatment, offering a novel and environmentally friendly solution to mitigating the adverse effects of environmental contamination.
摘要：
煤炭行业的逐渐衰落需要开发有效的酸性矿井排水处理解决方案（AMD），其特征是高酸度和高浓度的重金属。这项研究提出了一种创新的方法，利用硫酸盐还原细菌（SRB）适应污染的厌氧环境。本研究的重点是阐明SRB的生理特性和最佳生长条件。特别是与pH值和温度有关。实验结果表明，在30°C的最佳温度下，SRB的硫酸盐去除率为88.86％。此外,使用海藻酸钠（SA）和羧甲基纤维素（CMC）配制SRB凝胶颗粒，并在特定条件下（pH=6，C/S=1.5，T=30°C，CMC=4.5%，BSNa=0.4mol/L，和交联时间=9小时）。在这些条件下,SRB凝胶颗粒表现出91.6%的增强的硫酸盐去除效率。通过差示扫描量热法(DSC)和热重分析(TGA)的热分析提供了对SRB凝胶球的稳定性和性质的进一步了解。这些发现强调了基于SRB的生物修复作为一种可持续和有效的AMD治疗方法的潜力。提供一种新颖的环保解决方案，以减轻环境污染的不利影响。
