Cao Di, Niu Ruiyan, Mo Guanglu, Deng Huiwen, Liu Rui, Liu Jie, Fan Jialin
Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo‑Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China; Key Laboratory of Low‑Carbon Green Agriculture in Northeastern China, Ministry of Agriculture and Rural Affairs, China; College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China.
Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo‑Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China.
Ecotoxicol Environ Saf. 2025 Jan 15;290:117557. doi: 10.1016/j.ecoenv.2024.117557. Epub 2024 Dec 18.
Carbon-nanotube-modified biochar (CNT3-CBC) with a nanostructured surface was prepared by using cattle manure as the raw material via the impregnation method. This modified biochar was then used to adsorb petroleum and Ni(II) from aqueous solutions. Various physicochemical characterization techniques were employed, including SEM, BET analysis, FTIR, and XPS. Kinetic and isothermal adsorption characteristics were analyzed. The influence of different biochar dosages, solution pH levels, and number of adsorption cycles on the efficiency of removal of crude oil and Ni(II) was meticulously evaluated. Results indicated that modified biochar had a higher surface area, a greater number of surface functional groups, and higher interaction forces compared to biochar. Adsorption kinetics and isotherms showed that modified biochar had a strong adsorption capacity. The experimental data conformed closely to the Elovich, Langmuir, and Freundlich adsorption models, underscoring the significant contributions of both physical and chemical adsorption mechanisms. Competitive adsorption of modified biochar in the co-sorption of petroleum and nickel solutions exists, and the modified biochar demonstrated high capacities for crude oil and Ni(II) in the competitive adsorption. The modified biochar prepared at a pyrolysis temperature of 800°C exhibited a superior adsorption performance, and the adsorption capacities of crude oil and Ni(II) were 303.03 mg·g and 32.87 mg·g¹ , respectively. Modified biochar has better regeneration potential after crude oil and Ni(II) adsorption, with the removal efficiency remaining above 50 % in the fourth cycle. As an efficient and environmentally friendly adsorbent, modified biochar shows great potential for removing crude oil and Ni(II) pollutants from water.
以牛粪为原料，采用浸渍法制备了具有纳米结构表面的碳纳米管改性生物炭（CNT3-CBC）。然后将这种改性生物炭用于从水溶液中吸附石油和镍（II）。采用了各种物理化学表征技术，包括扫描电子显微镜（SEM）、比表面积分析（BET）、傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）。分析了动力学和等温吸附特性。精心评估了不同生物炭剂量、溶液pH值和吸附循环次数对原油和镍（II）去除效率的影响。结果表明，与生物炭相比，改性生物炭具有更高的比表面积、更多的表面官能团和更强的相互作用力。吸附动力学和等温线表明，改性生物炭具有很强的吸附能力。实验数据与埃洛维奇、朗缪尔和弗伦德利希吸附模型密切相符，突出了物理和化学吸附机制的重要贡献。改性生物炭在石油和镍溶液的共吸附中存在竞争吸附，并且在竞争吸附中对原油和镍（II）表现出高吸附容量。在800℃热解温度下制备的改性生物炭表现出优异的吸附性能，原油和镍（II）的吸附容量分别为303.03 mg·g和32.87 mg·g-1。改性生物炭在吸附原油和镍（II）后具有较好的再生潜力，在第四个循环中去除效率仍保持在50%以上。作为一种高效且环保的吸附剂，改性生物炭在去除水中原油和镍（II）污染物方面显示出巨大潜力。
