| 猪粪生物炭对水体磷酸盐的吸附特性 |
| 摘要点击 3502 全文点击 637 投稿时间：2024-06-19 修订日期：2024-09-29 |
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| 中文关键词 猪粪（SM） 生物炭 吸附 磷酸盐 响应曲面法 |
| 英文关键词 swine manure（SM） biochar adsorption phosphate response surface methodology |
| DOI 10.13227/j.hjkx.202406197 |
| 作者 | 单位 | E-mail | | 李琴 | 江西省科学院能源研究所, 温室气体核算与碳减排江西省重点实验室, 南昌 330096
江西省碳中和研究中心, 南昌 330096 | leetsin93@foxmail.com | | 詹聪 | 江西省科学院能源研究所, 温室气体核算与碳减排江西省重点实验室, 南昌 330096
江西省碳中和研究中心, 南昌 330096 | | | 桂双林 | 江西省科学院能源研究所, 温室气体核算与碳减排江西省重点实验室, 南昌 330096
江西省碳中和研究中心, 南昌 330096 | | | 邓同辉 | 江西省科学院能源研究所, 温室气体核算与碳减排江西省重点实验室, 南昌 330096
江西省碳中和研究中心, 南昌 330096 | | | 贾卓 | 南昌大学工程建设学院, 南昌 330038 | jiazhuo@ncu.edu.cn |
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| 中文摘要 |
| 为解决水体磷污染问题及实现畜禽粪便生物质资源化利用,选取猪粪为原料制备猪粪生物炭（SMBC700）. 通过元素分析、比表面积分析和FTIR对SMBC700的组成和结构进行表征. 采用吸附等温模型和吸附动力学模型拟合SMBC700对磷酸盐的吸附特征,考察热解温度、生物炭添加量、初始溶液pH和共存离子对其吸附磷酸盐的影响,并通过响应曲面法（RSM）对影响磷酸盐吸附的条件进行优化. 结果表明,仅热解温度为700℃的猪粪生物炭SMBC700对磷酸盐具有吸附能力. 在吸附剂添加量为2 g·L-1,磷酸盐初始质量浓度为20 mg·L-1时,SMBC700对磷酸盐吸附量达到6.127 1 mg·g-1；吸附符合Langmuir等温模型,吸附动力学过程遵循准二级动力学,并且在较广的pH（3~12）范围都具有良好的吸附磷酸盐能力,HCO3-共存会显著降低SMBC700对磷酸盐的吸附能力. 通过RSM分析得到SMBC700对磷酸盐的最佳吸附条件：SMBC700添加量为3 g·L-1,磷酸盐初始质量浓度为30 mg·L-1,pH值为7.0. SMBC700吸附磷酸盐的主要机制为静电吸附、配体交换和孔隙填充. |
| 英文摘要 |
| To solve the problem of phosphate pollution in water and achieve the resource utilization of livestock and poultry manure biomass, swine manure was selected as the raw material to prepare biochar. The composition and structure of SMBC700 were characterized using elemental analysis, specific surface area analysis, and FTIR. The adsorption isotherm model and adsorption kinetics model were used to fit the phosphate adsorption characteristics of swine manure biochar, and the effects of pyrolysis temperature, biochar dosing, initial solution pH, and coexisting ions on phosphate adsorption by biochar were studied. The conditions affecting phosphate adsorption were optimized by response surface methodology （RSM）. The results showed that only SMBC700 could adsorb phosphate. The phosphate adsorption capacity of SMBC700 reached 6.127 1 mg·g-1 at a SMBC700 dosage of 2 g·L-1 and the initial phosphate concentration of 20 mg·L-1. The adsorption isotherm and kinetics were better fitted by the Langmuir isotherm model and the pseudo second-order kinetics. SMBC700 exhibited an excellent performance for phosphate adsorption over a wide pH range （3-12）. The coexistence of HCO3- could significantly weaken the adsorption capacity of SMBC700 to phosphate. The optimum conditions for phosphate adsorption by SMBC700 were obtained by RSM analysis with a dosage of 3 g·L-1, an initial phosphate concentration of 30 mg·L-1, and a pH of 7.0. The possible mechanisms of phosphate adsorption by SMBC700 included electrostatic adsorption, ligand exchange, and pore filling. |
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