Adsorption of MCPA, 2,4-D and diuron onto activated carbons from wood composites

I.P.P. Cansado, P.A.M. Mourão, J.A.F.L. Gomes, V. Almodôvar
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引用次数: 21

Abstract

Activated carbon adsorbents were produced from particleboard and medium-density fiberboard, industry originated wastes, without value added applications. These materials were characterized, showing a well-developed microporous structure reaching 0.58 cm3/g, and afterwards, their potential application for the removal of phenoxy acetic acids and substituted urea herbicide was evaluated. Studies in liquid phase were conducted in 2,4-dichlorophenoxy acetic acid (2,4-D), 4-chloro-2-methylphenoxy acetic acid (MCPA) and 3-(3,4-dichlorophenyl)-1,1-dimethylurea (diuron), being the obtained data linearized using the Langmuir and Freundlich equations. Results indicated high removal capabilities for the adsorptives in study, reaching 0.97, 1.37 and 1.87 mmol/g for diuron, 2,4-D, and MCPA respectively, allowing the conclusion that these materials should be studied further, having in mind real life applications.

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木质复合材料活性炭对MCPA、2,4- d和diuron的吸附研究
活性炭吸附剂是由工业废弃物刨花板和中密度纤维板生产的,没有增值应用。对这些材料进行了表征,发现其微孔结构发育良好,可达0.58 cm3/g,并对其在去除苯氧乙酸和替代脲类除草剂方面的潜在应用进行了评价。用2,4-二氯苯氧基乙酸(2,4- d)、4-氯-2-甲基苯氧基乙酸(MCPA)和3-(3,4-二氯苯基)-1,1-二甲基脲(diuron)进行液相研究,所得数据使用Langmuir和Freundlich方程线性化。结果表明,所研究的吸附剂具有较高的去除率,对diuron, 2,4- d和MCPA的去除率分别达到0.97,1.37和1.87 mmol/g,从而得出结论,考虑到实际应用,这些材料应该进一步研究。
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