Steel slag-based porous geological polymer (PGS) was prepared with steel slag as the main mineral raw material,and the PGS preparation process was further optimized by orthogonal experiment.The influences of water glass admixture,H2O2 admixture,H2O admixture and curing temperature on the total porosity,compressive strength,volume water absorption,apparent aperture and specific surface area of PGS were studied by extreme difference analysis.Optimization samples were selected for Pb2+ static adsorption experiments to obtain the best parameters.The experimental results showed that the curing temperature significantly affected the physical properties and pore structure.Pb2+ static adsorption experiment demonstrated that PGS had good adsorption effect towards Pb2+,and when the dosages of water glass,H2O2 and H2O were 20.4%,4%,and 60%,respectively,at the curing temperature of 50℃,the removal rate of PGS toward Pb2+ achieved 99.48% and saturated adsorption reached to 19.896mg/g.Meanwhile,the adsorption process conformed to the quasi-secondary kinetic model.
[1] Davidovits J.Geopolymer:chemistry & application[M].Saint-Quentin,France:Institute geopolymer,2008,10-12.
[2] Liu H L,He H Y,Li Y,et al.Coupling effect of steel slag in preparation of calcium-containing geopolymers with spent fluid catalytic cracking(FCC) catalyst[J].Construction and Building Materials,2021,290:123194.1-123194.9.
[3] 张西玲,郭海峰,汤子奇,等.钢渣微粉-粉煤灰基地质聚合物性能研究及微观结构分析[J].硅酸盐通报,2021,40(12):4044-4051.
[4] Davidovits J.Recent progresses in concretes for nuclear waste and uranium waste containment[J].Acta Physiologiae Plantarum,1994,19(3):285-293.
[5] Novais R M,Pullar R C,Labrincha J A.Geopolymer foams:an overview of recent advancements[J].Progress in Materials Science,2019,109(C):100621.
[6] Liu F.Effect of the ratio of silica source on ultra-light calcium silicate material in situ strengthened with xonotlite whiskers[J].Advanced Materials Research,2013,2250(648):131-134.
[7] Ahmer A S.A review on geopolymers as emerging materials for the adsorption of heavy metals and dyes[J].Journal of Environmental Management,2018,224:327-339.
[8] Yang Y,Jiang J,Li H,et al.Pore structure and properties of porous geopolymer based on pre-swelled bentonite[J].Construction and Building Materials,2020,254:119226.
[9] 王英明,姜亮,董彦博,等.粉煤灰基地质聚合物制备及其对Cu2+的吸附性能[J].洁净煤技术,2018,24(5):120-125,131.
[10] 桑明明,赵恒泽,吴培益,等.钢渣基多孔地质聚合物的制备及吸附性能研究[J].硅酸盐通报,2022,41(2):562-571,581.
[11] Saeed A,Zhang L Y,Zhang J H.Effects of activator type/concentration and curing temperature on alkali-activated binder based on copper mine tailings[J].Journal of Materials Science,2012,47(16):5933-5945.
[12] 张文生,叶家元,王妍萍,等.掺杂有机大分子水化硅酸钙的孔结构及表面分形特征[J].硅酸盐学报,2006,34(12):1497-1502.
[13] 樊月.水化硅酸钙及集料表面离子吸附的分子动力学研究[D].广州:广州大学,2021.
[14] Wang Z.Silica oxide encapsulated natural zeolite for high efficiency removal of low concentration heavy metals in water[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2019,561:388-394.
[15] Heah C Y.Study on solids-to-liquid and alkaline activator ratios on kaolin-based geopolymers[J].Construction and Building Materials,2012,35:912-922.
[16] Lee W K.The effects of inorganic salt contamination on the strength and durability of geopolymers[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2002,211(2):115-126.
[17] 刘斯凤,王培铭,李宗津,等.粉煤灰地聚合物固封Cr3+的FT-IR和XPS研究[J].光谱学与光谱分析,2008(1):67-71.
[18] Roy D M.New strong cement materials:chemically bonded ceramics[J].Science,1987,235(4789):651-658.
[19] Dimitrios P,Ioanna P,Theosora P.Effect of synthesis parameters on the mechanical properties of fly ash-based geopolymers[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2006,301(1):246-254.
[20] Wei K P,Mahyuddin R,Chee B C.An overview on the influence of various factors on the properties of geopolymer concrete derived from industrial by-products[J].Construction and Building Materials,2015,77:370-395.
[21] Gan H Y,Robert J,Xie S Y,et al.Recent progress in the syntheses of mesoporous metal-organic framework materials[J].Coordination Chemistry Reviews,2018,369:76-90.
[22] 刘盛余,马少健,叶芝祥,等.钢渣吸附Pb2+的动力学研究[J].化工环保,2007(3):214-217.
[23] 刘盛余,马少健,高谨,等.钢渣吸附剂吸附机理的研究[J].环境工程学报,2008,2(1):115-119.
[24] 马少健,刘盛余,胡治流,等.钢渣吸附剂对铬和铅重金属离子的吸附特性研究[J].有色矿冶,2004(4):57-59.
[25] 申颖颖.钢渣吸附性能的改进及其资源化应用的研究[D].南京:南京理工大学,2015.
[26] Zhan X H,Xiao L P,Liang B.Removal of Pb(Ⅱ) from acid mine drainage with bentonite-steel slag composite particles[J].Sustainability,2019,11(16):4476-4476.
[27] 任德毅,田犀卓,贺凤伟,等.钢渣-蒙脱石颗粒吸附剂对水中Pb2+的去除研究[J].辽宁科技学院学报,2017,19(2):22-23,32.
[28] 李铭杰,张宇晨,王世源,等.凝胶包裹型吸附剂对Au(Ⅲ)的吸附动力学研究[J].离子交换与吸附,2021,37(6):507-516.
基金资助
河北省自然科学基金青年基金项目(E2020209038);国家自然科学基金青年基金项目(51802097)
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