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摘要
采用高温高压热解和芬顿氧化相结合的方法处理聚乳酸材料,通过X射线衍射和红外光谱等方法对材料进行了表征分析,并研究了热解温度、芬顿反应时间、溶液pH、H2O2和七水合硫酸亚铁(FeSO4·7H2O)投加量对处理后溶液化学需氧量(COD)的影响。结果表明,水热反应温度达到200℃时,聚乳酸可以完全热解;当溶液pH=3、H2O2投加量为55.2mL、FeSO4·7H2O投加量为21g时,通过芬顿反应可以将热解后溶液COD值由105000mg/L降低至287mg/L。
Abstract
A combination of high-temperature and high-pressure pyrolysis and Fenton oxidation method was used to treat polylactic acid materials.The materials were characterized and analyzed using X-ray diffraction and infrared spectroscopy.The effects of pyrolysis temperature,Fenton reaction time,solution pH,H2O2 and FeSO4·7H2O dosage on the chemical oxygen demand(COD) of the treated solution were studied.The results showed that when the hydrothermal reaction temperature reached 200℃,polylactic acid could undergo complete pyrolysis.When the pH of the solution was 3,the amount of H2O2 added was 55.2mL,and the amount of FeSO4·7H2O added was 21g,the Fenton method could reduce the COD of the pyrolyzed solution from 105000mg/L to 287mg/L.
关键词
聚乳酸
/
芬顿反应
/
热解
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化学需氧量
Key words
polylactic acid
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Fenton reaction
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pyrolysis
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chemical oxygen demand
热解—芬顿法处理聚乳酸技术研究[J].
化工新型材料, 2024, 52(11): 231-234 DOI:10.19817/j.cnki.issn1006-3536.2024.11.019
[1] 王航,刘李娜,李喆,等.国外放射性污染防护服装的研究现状[J].中国个体防护装备,2021(5):21-24.
[2] 李方,程浩南.聚乳酸纤维的性能、应用及发展方向[J].产业用纺织品,2018,36(10):30-33.
[3] 史可,苏婷婷,王战勇.可降解塑料聚乳酸(PLA)生物降解性能进展[J].塑料,2019,48(3):36-41.
[4] 毛晨,刘番,鄂毅,等.纳米CoFe2O4的制备及其对PLA结晶性能的影响[J].中国塑料,2022,36(1):9-14.
[5] 姚若兰,李晓莲,杨海亮,等.聚乳酸热解行为及其机理分析[J].浙江理工大学学报(自然科学版),2022,47(6):799-805.
[6] 洪晨,邢奕,司艳晓,等.芬顿试剂氧化对污泥脱水性能的影响[J].环境科学研究,2014,27(6):615-622.
[7] 王丽苹,李平,木合塔尔·吐尔洪,等.Fe0/H2O2类芬顿法提高污泥脱水性能及机理分析[J].现代化工,2018,38(12):119-123.
