Qu Deye, Yu Yali, Zhu Mengchen, Lei Chunni, Wang Bo, Wang Xinchao, Zhou Xiaoping
College of Geography and Environmental Science, Northwest Normal University, Lanzhou, 730070, Gansu, China.
Key Laboratory of Resources Environment and Sustainable Development of Oasis, Lanzhou, 730070, Gansu, China.
Sci Rep. 2025 Apr 29;15(1):15062. doi: 10.1038/s41598-025-97402-8.
Olive pomace was used as raw material and then activated by potassium hydroxide to obtain olive pomace activated carbon (OP-AC). The effects of different dosage, pH and adsorption time of OP-AC on the removal of seven organic dyes (methylene blue MB, methyl orange MO, Congo red CV, neutral red CR, malachite green MG, crystal violet BL and rhodamine B RHB) in water were investigated. The adsorption behavior of OP-AC on seven organic dyes was studied through adsorption experiments, and the feasibility of treating mixed printing and dyeing water by OP-AC was also discussed. The results show that the removal rate of seven organic dyes is better when the dosage of OP-AC is 0.6 g and the adsorption time is 24 h. The removal efficiency of dyes is different under different pH conditions, among which the removal rate of MO, CR and BL is better in acidic environment (pH = 4), while it is beneficial to the removal of MB, RHB, MG and CV in alkaline environment (pH = 12). The removal efficiency of dyes under better conditions is CV > MB > RHB > Mo > BL > Mg > Cr. The adsorption process of olive pomace activated carbon for seven dyes is more in line with Langmuir isothermal adsorption model, and the correlation coefficients are all greater than 0.98, indicating that the adsorption process of seven dyes is of single layer adsorption; The adsorption kinetics is more in line with the quasi-second-order kinetic model, and chemical adsorption is dominant in the adsorption process, with correlation coefficients greater than 0.97. Under the conditions of OP-AC dosage of 4.0 g, adsorption time of 24 h and pH equaling 10.9 (unadjusted), the removal efficiency of RHB is the highest (99.6%) and that of CR is the lowest (59.6%), and the removal efficiency of mixed organic dyes is the highest. The removal efficiency of seven organic dyes is: RHB > MG > MB > CV > BL > MO > CR.Kindly check and confirm the corresponding affiliation has been correctly processed.The author's affiliation is checked and correct.Please confirm the inserted city name for the affiliation 4 is correct and amend if necessary.affiliation 4 is correct.
以橄榄果渣为原料，经氢氧化钾活化制得橄榄果渣活性炭（OP - AC）。研究了OP - AC不同投加量、pH值及吸附时间对水中7种有机染料（亚甲基蓝MB、甲基橙MO、刚果红CV、中性红CR、孔雀石绿MG、结晶紫BL和罗丹明B RHB）去除效果的影响。通过吸附实验研究了OP - AC对7种有机染料的吸附行为，并探讨了OP - AC处理印染混合废水的可行性。结果表明，OP - AC投加量为0.6 g、吸附时间为24 h时，7种有机染料的去除率较好。不同pH条件下染料的去除效率不同，其中酸性环境（pH = 4）对MO、CR和BL的去除率较好，而碱性环境（pH = 12）有利于MB、RHB、MG和CV的去除。较好条件下染料的去除效率为CV＞MB＞RHB＞Mo＞BL＞Mg＞Cr。橄榄果渣活性炭对7种染料的吸附过程更符合Langmuir等温吸附模型，相关系数均大于0.98，表示7种染料的吸附过程为单层吸附；吸附动力学更符合准二级动力学模型，吸附过程以化学吸附为主，相关系数大于0.97。在OP - AC投加量为4.0 g、吸附时间为24 h、pH值为10.9（未调节）的条件下，RHB的去除效率最高（99.6%），CR的去除效率最低（59.6%），混合有机染料的去除效率最高。7种有机染料的去除效率为：RHB＞MG＞MB＞CV＞BL＞MO＞CR。请检查并确认相应的单位信息已正确处理。作者单位信息已检查无误。请确认单位4插入的城市名称是否正确，如有必要请修改。单位4正确。
