PDF(Pubmed)
Abstract：
Sugarcane bagasse fly ash, a residual product resulting from the incineration of biomass to generate power and steam, is rich in SiO2. Sodium silicate is a fundamental material for synthesizing highly porous silica-based adsorbents to serve circular practices. Aflatoxin B1 (AFB1), a significant contaminant in animal feeds, necessitates the integration of adsorbents, crucial for reducing aflatoxin concentrations during the digestive process of animals. This research aimed to synthesize aluminosilicate and zinc silicate derived from sodium silicate based on sugarcane bagasse fly ash, each characterized by a varied molar ratio of aluminum (Al) to silicon (Si) and zinc (Zn) to silicon (Si), respectively. The primary focus of this study was to evaluate their respective capacities for adsorbing AFB1. It was revealed that aluminosilicate exhibited notably superior AFB1 adsorption capabilities compared to zinc silicate and silica. Furthermore, the adsorption efficacy increased with higher molar ratios of Al:Si for aluminosilicate and Zn:Si for zinc silicate. The N2 confirmed AFB1 adsorption within the pores of the adsorbent. In particular, the aluminosilicate variant with a molar ratio of 0.08 (Al:Si) showcased the most substantial AFB1 adsorption capacity, registering at 88.25% after an in vitro intestinal phase. The adsorption ability is directly correlated with the presence of surface acidic sites and negatively charged surfaces. Notably, the kinetics of the adsorption process were best elucidated through the application of the pseudo-second-order model, effectively describing the behavior of both aluminosilicate and zinc silicate in adsorbing AFB1.
摘要：
甘蔗渣粉煤灰，焚烧生物质以发电和蒸汽产生的残余产物，富含SiO2。硅酸钠是用于合成高度多孔的二氧化硅基吸附剂以用于循环实践的基本材料。黄曲霉毒素B1(AFB1),动物饲料中的一种重要污染物，需要整合吸附剂，对于降低动物消化过程中的黄曲霉毒素浓度至关重要。本研究以甘蔗渣粉煤灰为原料,以硅酸钠为原料合成硅铝酸盐和硅酸锌,各自的特征在于铝（Al）与硅（Si）和锌（Zn）与硅（Si）的不同摩尔比，分别。这项研究的主要重点是评估它们各自吸附AFB1的能力。结果表明，与硅酸锌和二氧化硅相比，硅铝酸盐表现出明显优异的AFB1吸附能力。此外，硅铝酸盐和硅酸锌的Al：Si摩尔比越高，吸附效率就越高。N2证实AFB1吸附在吸附剂的孔内。特别是,摩尔比为0.08（Al：Si）的铝硅酸盐变体展示了最实质性的AFB1吸附能力，在体外肠道期后登记为88.25%。吸附能力与表面酸性位点和带负电荷的表面的存在直接相关。值得注意的是,通过伪二阶模型的应用，最好地阐明了吸附过程的动力学，有效地描述了硅铝酸盐和硅酸锌在吸附AFB1中的行为。
