生物炭对水溶液中四环素的吸附效果研究
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摘要
以大豆秸秆生物炭和水稻秸秆生物炭为材料,探究其对水溶液中四环素的吸附效果,分别进行了吸附剂用量、振荡时间及pH值等因素对生物炭吸附四环素的影响实验.结果表明,对于大豆秸秆生物炭,酸性环境条件对吸附有抑制作用,吸附时间为60 min时效率最高,含盐量对吸附有抑制作用,添加量为100 mg时吸附效果最好;对于水稻秸秆生物炭,碱性环境条件对吸附有抑制作用,吸附时间为120min时效率最高,含盐量对吸附有抑制作用,添加量为80mg时吸附效果最好,等温吸附过程遵循Langmuir方程.
Soybean straw biochar and rice straw biochar were used as materials to explore the adsorption effect of tetracycline in aqueous solution,and the effects of adsorbent dosage,oscillation time,pH value and other factors on the adsorption of tetracycline on biochar were studied.The results showed that for soybean straw biochar,acidic environmental conditions have an inhibitory effect on adsorption,and the adsorption efficiency is the highest when the adsorption time is 60 min,salt content has an inhibitory effect on adsorption,and the adsorption effect is the best when the addition amount is 100 mg.For the rice straw biochar,alkaline environmental conditions have an inhibitory effect on the adsorption,and the adsorption efficiency is the highest when the adsorption time is 120 min,the salt content has an inhibitory effect on the adsorption,and the adsorption effect is the best when the addition amount is 80 mg,and the isothermal adsorption process follows the Langmuir equation.
Soybean straw biochar and rice straw biochar were used as materials to explore the adsorption effect of tetracycline in aqueous solution,and the effects of adsorbent dosage,oscillation time,pH value and other factors on the adsorption of tetracycline on biochar were studied.The results showed that for soybean straw biochar,acidic environmental conditions have an inhibitory effect on adsorption,and the adsorption efficiency is the highest when the adsorption time is 60 min,salt content has an inhibitory effect on adsorption,and the adsorption effect is the best when the addition amount is 100 mg.For the rice straw biochar,alkaline environmental conditions have an inhibitory effect on the adsorption,and the adsorption efficiency is the highest when the adsorption time is 120 min,the salt content has an inhibitory effect on the adsorption,and the adsorption effect is the best when the addition amount is 80 mg,and the isothermal adsorption process follows the Langmuir equation.
引文
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[4]李经纬,刘小燕,王美欢,等.抗生素在水环境中的分布及其毒性效应研究进展[J].广州化工,2016,44(17):10-13
[5]Kim S C,Carlson K.Temporal and spatial trends in the occurrence of human and veterinary antibiotics in aqueous and river sediment matrices[J].Environmental Science&Technology,2007,41(1):50-57
[6]Martinez J L.Antibiotics and antibiotic resistance genes in natural environments[J].Science,2008,321(5887):365-367
[7]Oberle K,Capdeville M J,Berthe T,et al.Evidence for a complex relationship between antibiotics and antibiotic-resistant escherichia coli:from medical center patients to a receiting environment[J].Environmental Science&Technology,2012,46(3):1859-1868
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