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| 1 | 茶果壳活性炭的制备及其对水中3种污染物的吸附作用显示文摘为探讨茶果壳活性炭对废水中的氯霉素、乙酰水杨酸和甲基橙的吸附作用,以茶果壳为原料,在热解温度为300、500、700℃下制备了茶果壳活性炭。利用比表面积及孔隙分析仪(BET)、扫描电镜(SEM)、傅立叶红外光谱(FT-IR)和X射线光电子能谱分析(XPS)对结构进行了表征分析。结果表明,茶果壳活性炭的比表面积和对3种污染物的吸附量均随热解温度的升高而增大,当热解温度为700℃时、比表面积达1524.95 m~2/g,对氯霉素、乙酰水杨酸及甲基橙的吸附量分别达130.10、109.46 mg/g及49.73 mg/g,准二级动力学方程模型均能更准确的描述茶果壳活性炭对3种污染物的吸附过程,均以化学吸附为主,对3种污染物的吸附等温线均更符合Freundlich等温吸附模型,主要为多分子层吸附。 | 李丽 侯洪波 王亚格 明桂峰 | 2023 | 云南化工2023，50，11： | 0 |
| 2 | Effect of Mixed Dispersants on Suppression of the Gel Effect during Aqueous Adiabatic Terpolymerization of AM,NaAA,and DMC显示文摘Gelation adversely affects the aqueous adiabatic terpolymerization of acrylamide (AM), sodium acrylate (NaAA),and 2-methacryloyloxyethyl trimethylammonium chloride (DMC). Here, the mixed dispersants sorbitan monooleate (Span80) and polyoxyethylene sorbitan monooleate (Tween 80) were introduced to the terpolymerization system in an attemptto mitigate the gel effect. This enabled the preparation of high-performance amphoteric polyacrylamides, which werecharacterized by Fourier-transform infrared spectroscopy and thermogravimetric analysis. The influences of the dispersanttype and content as well as the hydrophilic-lipophilic balance (HLB) on the gel effect were examined, and the mechanismunderlying the suppression of the gel effect was considered. The obtained results indicated that the gel effect can beeffectively mitigated using an aqueous adiabatic terpolymerization system containing mixed Span 80/Tween 80 dispersantsat various contents. In particular, mixed dispersant contents of 0.6%–0.8% with HLB values of 5.0–6.0 afforded the optimalperformance (e.g., high viscosity, fast aqueous dissolution time, and the like). | Yang Junfeng Zhou Manli Wang Meng | 2023 | China Petroleum Processing & Petrochemical Technology2023，25，3： | 0 |
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