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| 硫铁改性生物炭吸附水中Pb（Ⅱ）的特性及机理研究 |
| Study on the Characteristics and Mechanism of Pb（Ⅱ） Adsorption by Sulfur iron Modified Biochar in Water |
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| DOI： |
| 中文关键词: Pb（Ⅱ） 硫铁改性生物炭 吸附性能 水处理 |
| 英文关键词: Pb（Ⅱ） Sulfur iron modified biochar Adsorption performance Water treatment |
| 基金项目:国家自然科学基金资助项目（42072201）；安徽省高校协同创新基金资助项目（GXXT-2021-017） |
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| 中文摘要: |
| 以杉木木屑为原料制备生物炭（BC），采用化学共沉淀法对不同热解温度下制备铁改性生物炭（Fe-BC）和硫铁改性生物炭（S/Fe-BC）。通过吸附试验筛选最优吸附材料，考察其对水中Pb（Ⅱ）的吸附性能。结果表明：S/Fe-BC对Pb（Ⅱ）的吸附性能显著优于BC和Fe-BC，热解温度对吸附性能影响较小；在投加量为04 g/L、pH值为55、Pb（Ⅱ）初始质量浓度为200 mg/L的条件下，S/Fe-BC的最大吸附容量为4046 mg/g，吸附过程符合准二级动力学方程和Langmuir等温线模型，以单层化学吸附为主。 |
| 英文摘要: |
| Biochar（BC） was prepared from Chinese fir sawdust， and iron modified biochar（Fe BC） and sulfur iron modified biochar（S/Fe BC） were synthesized via chemical co precipitation using BC obtained at different pyrolysis temperatures. The optimal adsorbent was selected through adsorption experiments， and its adsorption performance for Pb（Ⅱ） in water was investigated. The results showed that S/Fe BC exhibited significantly better Pb（Ⅱ） adsorption performance than BC and Fe BC， and the pyrolysis temperature had little influence on the adsorption performance. Under the conditions of an adsorbent dosage of 04 g/L， pH 55， and an initial Pb（Ⅱ） concentration of 200 mg/L， the maximum adsorption capacity of S/Fe BC reached 4046 mg/g. The adsorption process followed the pseudo second order kinetic equation and the Langmuir isotherm model， indicating predominantly monolayer chemisorption. |
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