In this paper,sinusoidal alternating current coagulation (SACC) method was used to prepare nano α-FeOOH adsorbent with large specific surface area and high charge density for the removal of Ni2+,Zn2+ and Cu2+ from water.The α-FeOOH adsorbent was analyzed and characterized by scanning electron microscopy (SEM),energy-dispersive spectroscopy (EDS),X-ray diffraction (XRD),Fourier-transform infrared spectroscopy (FT-IR),and X-ray photoelectron spectroscopy (XPS).The adsorption properties of α-FeOOH in monometallic and polymetallic competitive systems were investigated and the removal mechanism of heavy metal ions (Ni2+,Zn2+ and Cu2+) in electroflocculation reaction system was analyzed.The results showed that α-FeOOH prepared by SACC method had a large specific surface area and a high affinity for heavy metal ions.During the adsorption of monometallic ions,the adsorption capacity of α-FeOOH for Cu2+ was higher than that of Ni2+ and Zn2+,and the adsorption selectivity of the metal was Cu2+>Ni2+>Zn2+.The maximum adsorption capacities of Ni2+,Zn2+ and Cu2+ in monometallic systems were 56.3mg/g,52.5mg/g and 60mg/g,respectively.The maximum adsorption capacities in polymetallic system of Ni2+,Zn2+ and Cu2+ were 43.3mg/g,35.6mg/g and 52.1mg/g,respectively.The main removal mechanism of heavy metal ions (Ni2+,Zn2+,Cu2+) were as follows:the reduction reaction at the electrode (cathode) interface;the formation of Ni(OH)2,Zn(OH)2 and Cu(OH)2 precipitate;and the adsorption and coprecipitation of heavy metal ions by hydroxyl groups on the surface of α-FeOOH.
[1] Zhu Y,Zhang A,Lv Z.Research progress on heavy metals removal by graphene from wastewater[J].Carbon Letters,2024,34(1):177-189.
[2] Gezahegn T,Dereje M,Tefera M,et al.Analysis of nutrient loads,heavy metals and physicochemical properties of wastewater,wetland grass,and papaya samples:Gondar Malt factory,ethiopia with global implication[J].Toxicology Reports,2024,12:520-530.
[3] 高春丽,周涵君,李先振,等.吸附剂在重金属污染废水修复中的研究进展[J].工业水处理,2023,43(9):1-19.
[4] 雷红娟,康静文.木质素基复合材料吸附重金属离子的研究[J].化工新型材料,2023,51(10):209-213.
[5] 聂发辉,吴道,黄慧倩.海藻酸钠复合材料吸附污染物研究进展[J].化工新型材料,2022,50(6):307-312.
[6] 马欣洁,赵超锋,艾玥洁.碳纳米管吸附环境重金属机制研究——理论计算进展[J].环境化学,2023,42(1):55-70.
[7] 詹凤琪,李彦龙,盖安俊,等.活性氮化硼的制备,表征及其对重金属离子的吸附特性研究[J].环境科学研究,2023,36(7):1317-1328.
[8] Yong Z,Yi Fan X,Xu Guangsong,et al.Preparation of basic magnesium carbonate nanosheets modified pumice and its adsorption of heavy metals[J].Environmental Science and Po-llution Research,2023,30(51):111137-111151.
[9] Liu X,Shan Y,Zhang Q P H.Application of metal organic framework in wastewater treatment[J].Green Energy & Environment,2023,8(3):698-721.
[10] Shi T,Lü C,Zuo L.Adsorption of heavy metal ions by silylation modified zeolite[J].Chinese Journal of Environmental Engineering,2013,7(3):1045-1052.
[11] Agustina T E,Ramadhini T K,Melwita S G R.Synthesis and characterization of ZnO-zeolite photocatalyst nanocomposite for heavy metals degradation[J].Journal of Ecological Engineering,2024,25(3):272-281.
[12] Zhan X,Sun J,Zhang D.Evaluation of the performance of po-rous PBAT/modified zeolite composite materials for adsorption of Pb(Ⅱ) ions from wastewater[J].Polymer Compo-sites,2023,44(11):7876-7886.
[13] Zhan W,Xu C,Qian G,et al.Adsorption of Cu(Ⅱ),Zn(Ⅱ),and Pb(Ⅱ) from aqueous single and binary metal solutions by regenerated cellulose and sodium alginate chemically modified with polyethyleneimine[J].RSC Advances,2018,8(33):18723-18733.
[14] Wang T,Liu W,Xiong L,et al.Influence of pH,ionic strength and humic acid on competitive adsorption of Pb(Ⅱ),Cd(Ⅱ) and Cr(Ⅲ) onto titanate nanotubes[J].Chemical Engineering Journal,2013,215-216(1):366-374.
基金资助
国家自然科学基金面上项目(51974115);湖南省自然科学基金项目(2025JJ80338);湖南汽车工程职业大学校级重点课题(HQZYKY2023A10)
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