Contamination of wastewaters with pesticides has significant risk for environmental water. In spite of the rule of Europ, paraquat is used extensively as an herbicide in the all around the world and it is likely to be released into drinking water. Therefore the elimination of it from water is very important. In this paper a new sulfuric acid modified nano kaolin sorbent was synthesized with a simple and low cost method. Thereafter it was applied for removing of paraquat and the experimental conditions such as concentration of herbicide, dose of sorbent and pH of solution were optimized. The results showed the unmodified Kaolin wasn’t able to remove the paraquat efficiently. But with the proposed modified nano Kaolin removal percent reach to 98% in a short time 60 min. Also the results showed this system obeys from Frendluich adsorption isotherm.

中文翻译：

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使用硫酸改性的新型纳米高岭土通过主客体相互作用高效去除水溶液中的百草枯农药

被农药污染的废水对环境水具有重大风险。尽管有欧洲的统治，百草枯在世界各地被广泛用作除草剂，并且很可能会被释放到饮用水中。因此从水中去除它是非常重要的。本文采用简单、低成本的方法合成了一种新型硫酸改性纳米高岭土吸附剂。此后用于去除百草枯，并对除草剂浓度、吸附剂用量、溶液pH等实验条件进行了优化。结果表明，未改性的高岭土无法有效去除百草枯。但采用所提出的改性纳米高岭土去除率在 60 分钟内可达到 98%。结果还表明该系统符合Frendluich吸附等温线。