摘要
微藻固碳在应对温室效应、能源危机和促进低碳经济发展方面发挥着至关重要的作用,而固碳效率低是限制该技术发展的瓶颈问题,因此提出使用有机胺负载型中空纤维膜(疏水聚丙烯(PP)膜)提高微藻固碳性能。首先,对中空纤维膜进行疏水改性,接着通过物理方法将2-氨基-2-甲基-1-丙醇(AMP)负载于中空纤维膜;然后,将其浸没到微藻培养系统中作为CO_(2)气体进入培养液的媒介。过程中,AMP负载型PP膜可强化CO_(2)向微藻培养液的传质过程,从而强化CO_(2)脱除效率;AMP负载型PP膜可起到分隔CO_(2)与胺的化学反应场以及微藻吸收CO_(2)的生物反应场的作用,避免复杂混合反应;PP膜上的AMP及AMP与CO_(2)反应后的氨基甲酸盐不会溶解于培养液,不与微藻细胞直接接触,大大减小对微藻细胞的损伤,不影响细胞光合作用,从而提高效率;AMP负载型PP膜与微藻体系呈现分离状态,可通过简单的物理方法分离。试验结果表明,质量浓度为123.16 mg/L AMPPP膜强化技术可使生物质质量浓度(0.88 g/L)和CO_(2)固定效率(183.23 mg/(L·d))显著提高。与Blank组、Blank-PP组和123.16 mg/L AMP组相比,生物质浓度分别提高了28.05%、18.04%、183.57%,CO_(2)固定效率分别提高了58.23%、44.16%、168.42%。同时,该强化技术通过物理隔离作用消除AMP直接接触导致的氧化应激(SOD活性降低)与细胞损伤(分形维数仅增加5.9%),胺基化膜表面吸附CO_(2)后生成的氨基甲酸酯通过水解反应.使培养液溶解性无机碳(DIC)浓度提升,CO_(2)脱除效率达83.5%,显著优于溶解性AMP体系,突显了这种膜介导方法在微藻CO_(2)固定中的有效性。
Microalgae carbon sequestration plays a crucial role in addressing greenhouse effect,energy crisis,and promoting low-carbon economic development.However,low carbon sequestration efficiency is the bottleneck problem limiting the development of this technology.Therefore,this article proposes the use of organic amine supported hollow fiber membranes(hydrophobic polypropylene(PP)membranes)to improve microalgae carbon sequestration performance.Firstly,hydrophobic modification is performed on the hollow fiber membrane,followed by physical loading of 2-amino-2-methyl-1-propanol(AMP)onto the hollow fiber membrane;Then,immerse it in a microalgae culture system as a medium for CO_(2)gas to enter the culture medium.During the process,AMP loaded PP membrane can enhance the mass transfer of CO_(2)to microalgae culture medium,thereby improving the efficiency of CO_(2)removal;AMP loaded PP membrane can serve to separate the chemical reaction field between CO_(2)and amines,as well as the biological reaction field for microalgae to absorb CO_(2),avoiding complex mixing reactions;The AMP on the PP membrane and the amino formate formed by the reaction between AMP and CO_(2)do not dissolve in the culture medium and do not directly contact microalgae cells,greatly reducing damage to microalgae cells and not affecting cell photosynthesis,thereby improving efficiency;The AMP loaded PP membrane and microalgae system exhibit a separation state,which can be separated by simple physical methods.The experimental results showed that the 123.16 mg/L AMP-PP membrane reinforcement technology can significantly increase biomass concentration(0.88 g/L)and CO_(2)fixation efficiency(183.23 mg/(L·d)).Compared with the Blank group,Blank PP group,and 123.16 mg/L AMP group,the biomass concentration increased by 28.05%,18.04%,and 183.57%,respectively,and the CO_(2)fixation efficiency increased by 58.23%,44.16%,and 168.42%,respectively.At the same time,this enhanced technology eliminates oxidative stress(decreased SOD activity)and cell damage caused by direct contact with AMP through physical isolation(fractal dimension increased by only 5.9%).The amino formate generated after CO_(2)adsorption on the surface of the aminated membrane increases the concentration of dissolved inorganic carbon(DIC)in the culture medium through hydrolysis reaction,and the CO_(2)removal efficiency reaches 83.5%,significantly better than the dissolved AMP system,highlighting the effectiveness of this membrane mediated method in microalgae CO_(2)fixation.
作者
王雅琴
刘景超
白丽菊
陆诗建
陈思铭
唐华
WANG Yaqin;LIU Jingchao;BAI Liju;LU Shijian;CHEN Siming;TANG Hua(School of Environment and Geography,Qingdao University,Qingdao 266071,China;Jiangsu Provincial Key Laboratory of Coal-Based Greenhouse Gas Emission Reduction and Resource Utilization,China University of Mining and Technology,Xuzhou 221116,China;Carbon Neutralization Institute,China University of Mining and Technology,Xuzhou 221116,China)
出处
《洁净煤技术》
北大核心
2025年第8期65-75,共11页
Clean Coal Technology
基金
国家自然科学基金青年基金资助项目(52006112)
徐州市重点研发计划社会发展资助项目(KC23293)
中国博士后科学基金资助项目(2023M743768)。
作者简介
王雅琴(1997-),女,山西太原人,硕士研究生。E-mail:1079823495@qq.com;通讯作者:陆诗建(1984-),男,河南濮阳人,教授,博士。E-mail:lushijian@cumt.edu.cn;通讯作者:陈思铭(1988-),女,山东东营人,副研究员,博士。E-mail:chensiming@cumt.edu.cn。
