Zawierucha Iwona, Lagiewka Jakub, Gajda Aleksandra, Kwiatkowska-Malina Jolanta, Kulawik Damian, Ciesielski Wojciech, Zarska Sandra, Girek Tomasz, Konczyk Joanna, Malina Grzegorz
Institute of Chemistry, Jan Dlugosz University in Czestochowa, Armii Krajowej 13/15, 42-200 Czestochowa, Poland.
Strata Mechanics Research Institute, Polish Academy of Sciences, 30-059 Krakow, Poland.
Materials (Basel). 2024 Nov 26;17(23):5788. doi: 10.3390/ma17235788.
The presence of various pesticides in natural streams and wastewater is a significant environmental issue due to their high toxicity, which causes harmful consequences even at low quantities. One cost-effective method to remove these pollutants from water could be through adsorption using an inexpensive, easily obtained adsorbent-biochar. The presented research demonstrates the efficacy of applying biochar obtained from wheat grains to eliminate alachlor from water. The sorption properties of the biochar and the likely removal mechanisms are defined. The study found that the biochar removed 76-94% of alachlor, depending on the initial concentration of the pesticide in water. The maximum removal of alachlor (94%) using biochar occurred at an initial pesticide content of 1 mg/L. Both the pseudo-second-order kinetic (R = 0.999) and the Langmuir isotherm models (R = 0.996) effectively characterized the elimination of alachlor by wheat grain biochar. The biochar's maximum adsorption capacity for alachlor was 1.94 mg/g. The analyzed biochar, with its micropores and various surface functional groups, was able to effectively adsorb alachlor and trap it within its structure.
由于各种农药具有高毒性，即便含量很低也会造成有害后果，所以天然溪流和废水中存在的各种农药是一个重大的环境问题。一种从水中去除这些污染物的经济有效方法可能是使用廉价、容易获得的吸附剂——生物炭进行吸附。本研究表明了应用从小麦籽粒中获得的生物炭去除水中甲草胺的效果。确定了生物炭的吸附特性和可能的去除机制。研究发现，根据水中农药的初始浓度，生物炭可去除76%至94%的甲草胺。使用生物炭去除甲草胺的最大去除率（94%）发生在初始农药含量为1毫克/升时。准二级动力学模型（R = 0.999）和朗缪尔等温线模型（R = 0.996）都有效地描述了小麦籽粒生物炭对甲草胺的去除过程。生物炭对甲草胺的最大吸附容量为1.94毫克/克。所分析的生物炭具有微孔和各种表面官能团，能够有效地吸附甲草胺并将其捕获在其结构中。
