Potential Remediation of Waters Contaminated with Pesticides by Sorption on Recycled Organic Matter
Polymerin is a cheap bio-sorbent recovered from olive oil mill wastes, that shows to be versatile to sorb ionic and ionisable pesticides dissolved in simulated waste waters. In particular, kinetic studies and sorption isotherms showed MCPA to be sorbed more rapidly and efficiently than simazine. MCPA showed a Kd value on polymerin very similar to that of 2,4-D (335 L·kg-1), but higher than cyhalofop acid (194 L·kg-1), being Kd of the latter two herbicides previously reported. These data are in accordance with the chemical structure of the three pesticides. In fact, cyhalofop acid is a complex molecule and consequently the formation of H-bonding is more difficult due to the large hindrance. Kd of simazine was lower than that of paraquat (328 L·kg-1) because this molecule is sorbed on polymerin mainly by ionic exchange, with respect to a prevalent H-bounding interaction of simazine. The decontamination process of simulated waste waters with the selected individual herbicides by cyclic sorption on polymerin reveal to be completely efficient with regard to paraquat, in native conditions, but it requires to be more long investigated for the other considered herbicides. Therefore, actually we can propose polymerin as a potential component of biomassbed for the decontamination of paraquat originating from point sources.
polymerin herbicides MCPA simazine sorption point source decontamination
DE MARTINO Antonio ADDORISIO Veria SANNINO Filomena IORIO Marianna CAPASSO Renato
Department of Soil,Plant,Environment and Animal Productions Sciences,University of Naples Federico II,100 University Street,80055 Portici (Naples ) Italy
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1113-1121
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）