如今,除草剂造成的水污染是全球关注的问题。百草枯(PQ)(1-1-甲基-4,4-二吡啶二氯化物)是一种高性能芯片,它被广泛用于从农业和自然生态系统中去除杂草。PQ由于其在水中的高溶解度而可能污染水源。一些国家已经报道了PQ中毒效应导致的人类死亡。因此,PQ的副作用是一个全球性的挑战。本研究旨在研究植物提取物对PQ的生物修复,作为一个低成本的,无毒,和天然吸收剂在不同条件下从水溶液中去除PQ。在这方面,普通马齿轮轴的提取物(马齿轮轴),花店kalanchoe(kalanchoeblossfeldiana),和玉器植物(crassulaportulaca)被用作吸附剂。为此,各种参数的影响,如接触时间,PQ溶液的初始浓度,温度,pH值,并研究了提取物的量。本研究结果表明,马齿轮轴提取物和马齿轮轴提取物的吸附效率高于K。blossfeldiana提取物。在pH=11,吸附剂含量为0.2mgL-1时,PQ去除率最高(79.04%)。植物提取物在30分钟时观察到最高的PQ去除量,和15分钟的k。blossfeldiana提取物。此外,表面吸收能力随着植物提取物浓度的增加而增加,PQ浓度随温度升高而降低。最后,可以得出结论,植物提取物可以帮助从水溶液中去除PQ。
在许多国家,百草枯(PQ)等除草剂对原水的污染已成为一个问题。已知PQ为化学污染物,其在除草剂中具有高的水溶解度(620g/l),具有高的毒性。尽管一些国家禁止使用PQ,由于价格低廉,在低浓度下的高效率,百草枯高速抑制杂草,今天,这种除草剂被用来控制世界上各种各样的杂草。近年来,已经研究了从环境中去除PQ的各种方法。其中一些方法相对耗时且昂贵,大量的污泥和有害的副产品。在上述方法中,吸附过程操作简单,低成本工艺,从水中去除PQ效率高。最近,已经开发了许多吸附剂来从水溶液中去除PQ,包括生物炭,活性炭,壳聚糖和海藻酸盐,粘土,稻壳,还有膨润土.植物提取物可被称为从水中去除PQ的新型吸附剂材料,作为一种生态友好且经济的方法。因此,在这项研究中,我们研究了植物提取物作为吸附剂从水中去除PQ的性能。
Nowadays, water pollution by herbicides is known as a global concern. Paraquat (PQ) (1-1-methyl-4,4-bi-pyridinium-dichloride) is a chip with high performance, which is being widely used herbicide to remove weeds from agricultural and natural ecosystems. PQ can contaminate water sources due to its high solubility in water. Human death by poisoning effects of PQ has been reported in several countries. Therefore, the side effects of PQ are a global challenge. This study aimed to investigate the bioremediation of PQ by plant extracts, as a low-cost, nontoxic, and natural absorbent to remove PQ from aqueous solutions in different conditions. In this regard, the extracts of common purslane (portulaca oleracea), florist kalanchoe (kalanchoe blossfeldiana), and jade plant (crassula portulaca) were used as adsorbents. For this purpose, the effect of various parameters such as contact time, initial concentration of PQ solution, temperature, pH, and amount of extract was investigated. The results of present study showed that P. oleracea extract and C. portulaca extracts have higher adsorption efficiency than k. blossfeldiana extract. The highest PQ removal was obtained by P. oleracea extract (79.04%) and C. portulaca extract (78.72%) at pH = 11, the adsorbent content of 0.2 mg L-1, and the lowest absorption of PQ (50.6%) was obtained by K. blossfeldiana extract. The highest PQ removal by plant extract was observed at 30 min for P. oleracea and C. portulaca, and at 15 min for k. blossfeldiana extract. Moreover, surface absorption capacity increased with increasing plant extract concentration, decreasing PQ concentration and decreased with increasing temperature. Finally, it can be concluded that plant extract can help to remove PQ from the aqueous solution.
Contamination of raw water with herbicides such as paraquat (PQ) is recognized as a problem in many countries. PQ is known as a chemical contaminant that is highly toxic with high water solubilities (620 g/l) among herbicides. Despite the ban on the use of PQ in some countries, due to its low price, high efficiency at low concentrations, and high speed of paraquat in suppressing weeds, today this herbicide is used to control a wide range of weeds in the world. In recent years, various approaches to removing PQ from the environment have been studied. Some of these methods are relatively time-consuming and expensive, with large amounts of sludge and hazardous by-products. Among the mentioned methods, the adsorption process shows the simplicity of operation, low-cost process, and high efficiency in removing PQ from water. Recently, many adsorbents have been developed to remove PQ from aqueous solutions, including biochar, activated carbon, chitosan and alginate, clay, rice husk, and bentonite. Plant extracts may be known as new adsorbent materials for removing PQ from water as an eco-friendly and economical process. Therefore, in this study we investigate the plant extracts performance as adsorbents in PQ removal from water.