Tang Wei, Zanli Bi Lepohi Guy Laurent, Jing Fanqi, Hu Tingting, Chen Jiawei
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, PR China; School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, PR China.
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, PR China; School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, PR China.
Sci Total Environ. 2023 Jun 10;876:162792. doi: 10.1016/j.scitotenv.2023.162792. Epub 2023 Mar 11.
Biochar is getting increasing consideration for eco-friendly soil amendment and environmental remediation. Once added to the soil, biochar would undergo the natural ageing process, affecting its physicochemical properties and, as a result, the adsorption and immobilization of pollutants in the water and soil. To evaluate the high/low temperature pyrolyzed biochar performance on complex contaminants and the effect of climate ageing, the batch experiments were conducted on the adsorption of the pollutants of antibiotics sulfapyridine (SPY) and a typical coexisting heavy metal Cu as one or binary system on low/high pyrolytic temperature biochars before and after the simulated tropical climate and frigid climate region ageing treatment. The results showed that high-temperature ageing could enhance the SPY adsorption in biochar-amended soil. The SPY sorption mechanism was fully elucidated, and the result confirmed that H-bonding was the dominant role in biochar-amended soil, and π-π electron-donor-acceptor (EDA) interaction and micro-pore filling was another factor for SPY adsorption. This study could lead to the conclusion that low-temperature pyrolytic biochar is a better option for sulfonamide-Cu(II) contaminated soil remediation in tropical regions.
生物炭作为一种生态友好型土壤改良剂和环境修复材料正受到越来越多的关注。一旦添加到土壤中，生物炭会经历自然老化过程，这会影响其物理化学性质，进而影响其对水和土壤中污染物的吸附和固定。为了评估高低温热解生物炭对复合污染物的性能以及气候老化的影响，在模拟热带气候和寒冷气候区域老化处理前后，对低/高温热解生物炭上抗生素磺胺吡啶（SPY）污染物和典型共存重金属铜作为单一或二元体系的吸附进行了批量实验。结果表明，高温老化可以增强生物炭改良土壤中SPY的吸附。充分阐明了SPY的吸附机制，结果证实氢键在生物炭改良土壤中起主导作用，π-π电子供体-受体（EDA）相互作用和微孔填充是SPY吸附的另一个因素。本研究可以得出结论，低温热解生物炭是热带地区磺胺类-铜（II）污染土壤修复的更好选择。
