This paper proposes a green environment-friendly Bacillus subtilis to mineralize and consolidate waste incineration fly ash and heavy metal cations, and there is no harmful by-product in the mineralization process. Different phosphate products can be prepared, and are more stable than the microbially-induced carbonate precipitation (MICP) in nature. Typical heavy metal oxides were mainly PbO, ZnO, CdO, NiO, CuO and Cr2O3 in the chemical composition of waste incineration fly ash. Microstructure and chemical composition of waste incineration fly ash before and after treatment were characterized by powder X-ray diffraction (XRD) analysis and scanning electron microscopy. Scanning electron microscopy (SEM) images showed that the morphology of the Bacillus subtilis was mainly a rod-like structure. The optimal hydrolysis dosage of the organic phosphate monoester sodium salt was 0.2mol in the bacterial solution (1L, 20 g/L). The optimum required mass of the bacterial powder was 15 g/kg in treatment process of the waste incineration fly ash. The initial concentration of lead ions was 40.28 mg/L in waste incineration fly ash solution. After the optimum dosage treatment, the removal efficiency of lead ions was 78.15%, 79.64%, 77.70% and 80.14% when curing time was 1, 2, 4 and 6d, respectively. The waste incineration fly ash had a Shore hardness of 22 after the optimum amount of bacterial liquid treatment. Results of wind erosion test showed that the wind erosion rate of waste incineration fly ash was 2.6, 0, 0, 0, 0 and 0 g/h when blank group, deionized water, 100, 200, 300 and 400 mL of bacterial solutions treated, respectively. The bio-mineralization method provides an approach for the safe disposal of heavy metals in the contaminated areas of tailings, electroplating sewage, waste incineration plants, and so on.

中文翻译：

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废物焚烧粉煤灰的磷酸盐微生物矿化固结和去除铅离子。

本文提出了一种绿色环保的枯草芽孢杆菌，用于矿化和固结垃圾焚烧飞灰和重金属阳离子，并且在矿化过程中没有有害的副产物。可以制备不同的磷酸盐产物，并且其性质比微生物诱导的碳酸盐沉淀（MICP）更稳定。在垃圾焚烧粉煤灰的化学组成中，典型的重金属氧化物主要是PbO，ZnO，CdO，NiO，CuO和Cr2O3。通过粉末X射线衍射（XRD）分析和扫描电子显微镜对垃圾焚烧粉煤灰处理前后的微观结构和化学组成进行了表征。扫描电子显微镜（SEM）图像显示枯草芽孢杆菌的形态主要是杆状结构。在细菌溶液中（1L，20 g / L），有机磷酸单酯钠盐的最佳水解剂量为0.2mol。在废物焚烧粉煤灰的处理过程中，细菌粉末的最佳所需质量为15 g / kg。废物焚烧粉煤灰溶液中铅离子的初始浓度为40.28 mg / L。经过最佳剂量处理后，固化时间分别为1、2、4和6d时，铅离子的去除效率分别为78.15％，79.64％，77.70％和80.14％。经过最佳量的细菌液体处理后，垃圾焚烧飞灰的肖氏硬度为22。风蚀试验结果表明，空白组，去离子水，100、200、300、400 mL细菌溶液处理后，垃圾焚烧飞灰的风蚀率分别为2.6、0、0、0、0和0 g / h。 ， 分别。