MgFe-LDHs改性清淤污泥透水砖对磷酸盐吸附性能研究

秦耀君; 张翔凌; 李栩灏; 蔡纪贤; 李雅婷; 雷晓芸; 李伊凡

doi:10.13205/j.hjgc.202403009

MgFe-LDHs改性清淤污泥透水砖对磷酸盐吸附性能研究

doi: 10.13205/j.hjgc.202403009

武汉理工大学土木工程与建筑学院, 武汉 430070

基金项目:

国家自然科学基金项目(31670541)

详细信息

作者简介:
秦耀君(1997-),男,硕士研究生,主要研究方向为水污染控制理论及应用。qinyaojun1@qq.com

通讯作者:
张翔凌(1976-),男,教授,主要研究方向为水污染控制工程及水处理新材料研发。ZXLCL@126.com

计量
- 文章访问数: 65
- HTML全文浏览量: 11
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2022-11-27
- 网络出版日期: 2024-05-31

PERFORMANCE OF PHOSPHATE ADSORPTION BY MgFe-LDHs MODIFIED DREDGING SLUDGE PERMEABLE BRICK

School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China

摘要

摘要: 通过在合成功能材料层状双金属氢氧化物(layered double hydroxides, LDHs)过程中加入一定比例的清淤污泥制得改性污泥;并将其作为原料之一,制备4种不同质量掺混比的海绵城市用可净水透水砖。利用场发射扫描电子显微镜(SEM)、能谱分析仪(EDS)和X射线衍射仪(XRD),对掺混改性污泥前后透水砖的表面形态、化学成分与晶体结构进行表征;通过抗压性和透水性检测,结合吸附预试验结果,确定最佳改性质量掺混比;开展等温吸附、吸附动力学和热力学试验,探究掺混改性污泥前后透水砖对磷酸盐的吸附特性和作用机制。结果表明: 1)掺混比为1∶1的改性清淤污泥透水砖,相较于其他几种掺混比更具实用性,在初始浓度32 mg/L,透水砖投加量1.2 g,吸附时间360 min时,对磷酸盐的吸附容量达到2.08 mg/g; 2)掺混改性污泥前后透水砖对磷酸盐的吸附过程均符合Langmuir等温吸附模型和准二级动力学模型,且掺混后透水砖对磷酸盐的最大饱和吸附容量提升了25%;3)改性污泥的掺混,使得透水砖吸附磷酸盐所需能量减少,自发性增强,有助于透水砖在实际应用中对雨水的净化。
- 清淤污泥 /
- 透水砖 /
- MgFe-LDHs /
- 吸附 /
- 磷酸盐
Abstract: In this work, modified sludge was prepared by adding a certain proportion of dredging sludge in the process of synthesizing functional material layered double hydroxides (LDHs). It was used as one of the raw materials to prepare four kinds of water permeable bricks for sponge city construction with different mass mixing ratios. The surface morphology, chemical composition, and crystal structure of permeable bricks before and after mixing modified sludge were characterized by a field emission scanning electron microscope (SEM), energy dispersive spectrometer (EDS), and X-ray diffractometer (XRD). Through the detection of compressive strength and water permeability, combined with the results of purification experiments, the optimum blending ratio of modified quality was determined. Isothermal adsorption, adsorption kinetics, and thermodynamics experiments were carried out to explore the adsorption performance and mechanism of phosphate on permeable bricks before and after mixing modified sludge. The results showed that: 1) the modified dredged sludge permeable brick with a blending ratio of 1∶1 was more practical than several other mass blending ratios. When the initial phosphate concentration was 32 mg/L, the dosage of water permeable brick was 1.2 g, and the adsorption time was 360 min, then the adsorption capacity of phosphate reached 2.08 mg/g; 2) the adsorption process of phosphate by permeable brick before and after mixing modified sludge conformed to Langmuir isothermal adsorption model and pseudo-second-order kinetic model, and the maximum saturated adsorption capacity of phosphate by permeable brick increased by 25% after mixing modified sludge; 3) the addition of modified sludge reduced the energy required for the permeable brick to adsorb phosphate, and enhanced the spontaneity, which helps the permeable brick to purify rainwater in practical applications.
- lake sludge /
- permeable brick /
- MgFe-LDHs /
- adsorption /
- phosphate

HTML全文

参考文献(39)

[1]	ZHANG K, YANG X D, XU M, et al. Confronting challenges of managing degraded lake ecosystems in the Anthropocene, exemplified from the Yangtze River Basin in China[J]. Anthropocene, 2018, 24:30-39.
[2]	王昭, 李娟, 李丹萍, 等. 城市路面径流重金属排放规律及初期效应研究[J]. 环境工程, 2017,35(6):130-135.
[3]	郝学凯, 耿立馨. 城市径流污染控制与治理的探讨[J]. 环境工程, 2016, 34(增刊1):112-113.
[4]	YUAN D H, CUI L J, AN Y C, et al. Investigating the pollutant-removal performance and DOM characteristics of rainfall surface runoff during different ecological concrete revetments treatment[J]. Ecological Indicators, 2019, 105:655-662.
[5]	ABDOLLAHIAN S, KAZEMI H, ROCKAWAY T, et al. Stormwater quality benefits of permeable pavement systems with deep aggregate layers[J]. Environments, 2018, 5(6):68.
[6]	叶强. 工业固废制备透水砖及其孔结构研究进展[J]. 材料导报, 2021, 35(增刊1):274-278.
[7]	赵礼兵, 王帅, 李国峰, 等. 透水砖研究现状及其影响性能因素[J]. 矿产综合利用, 2019(5):6-8.
[8]	ORTEGA-VILLAR R, LIZÁRRAGA-MENDIOLA L, CORONEL-OLIVARES C, et al. Effect of photocatalytic Fe₂O₃ nanoparticles on urban runoff pollutant removal by permeable concrete[J]. Journal of Environmental Management, 2019, 242:487-495.
[9]	ZHANG X, LI H, HARVEY J T, et al. Purification effect on runoff pollution of porous concrete with nano-TiO₂ photocatalytic coating[J]. Transportation Research Part D:Transport and Environment, 2021, 101:103101.
[10]	PÉREZ-NICOLÁS M, PLANK J, RUIZ-IZURIAGA D, et al. Photocatalytically active coatings for cement and air lime mortars:enhancement of the activity by incorporation of superplasticizers[J]. Construction and Building Materials, 2018, 162:628-648.
[11]	段宽. 填埋法处置河道疏浚淤泥的设计技术研究[D]. 天津:天津大学, 2016.
[12]	汪理科. 湘江霞湾港河道重金属污染底泥疏浚过程的环境影响行为及治理研究[D]. 长沙:湖南大学, 2017.
[13]	ZHOU H, ZHANG W J, LI L Q, et al. Environmental impact and optimization of lake dredged-sludge treatment and disposal technologies based on life cycle assessment (LCA) analysis[J]. Science of the Total Environment, 2021, 787:147703.
[14]	YANG M, JU C G, XUE K R, et al. Environmental-friendly non-sintered permeable bricks:preparation from wrap-shell lightweight aggregates of dredged sediments and its performance[J]. Construction and Building Materials, 2021, 273:121751.
[15]	MYMRIN V, SCREMIM C B, STELLA J C, et al. Environmentally clean materials from contaminated marine dredged sludge, wood ashes and lime production wastes[J]. Journal of Cleaner Production, 2021, 307:127074.
[16]	LANG L, CHEN B, PAN Y J. Engineering properties evaluation of unfired sludge bricks solidified by cement-fly ash-lime admixed nano-SiO₂ under compaction forming technology[J]. Construction and Building Materials, 2020, 259:119879.
[17]	杨鹏乾. 疏浚底泥免烧法制备混凝土砖及其界面性能研究[D]. 天津:天津科技大学,2018.
[18]	HAFEZ R D A, TAYEH B A, ABD-AL FTAH R O. Development and evaluation of green fired clay bricks using industrial and agricultural wastes[J]. Case Studies in Construction Materials, 2022,17:e1391.
[19]	ZHANG X L, SONG Z, DOU Y K, et al. Removal difference of Cr(VI) by modified zeolites coated with MgAl and ZnAl-layered double hydroxides:efficiency, factors and mechanism[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2021, 621:126583.
[20]	陈丽红, 张翔凌, 何春艳, 等. Zn-LDHs覆膜改性麦饭石对Cd(Ⅱ)吸附性能及其作用机理研究[J]. 环境科学学报, 2019, 39(12):4004-4014.
[21]	向洋, 张翔凌, 雷雨, 等. 不同合成条件对ZnAl-LDHs覆膜改性生物陶粒除磷效果的影响[J]. 环境科学,2018, 39(5):2184-2194.
[22]	YANG Z Q, QIANG Z Q, GUO M, et al. Pilot and industrial scale tests of high-performance permeable bricks producing from ceramic waste[J]. Journal of Cleaner Production, 2020, 254:120167.
[23]	任树鹏, 齐宇彤, 石瑶, 等. 层状双氢氧化物负载生物炭对磷酸盐的吸附性能研究进展[J]. 环境化学, 2023, 42(2):1-10.
[24]	KIM T, LUNDEHØJ L, NIELEN U G. An investigation of the phosphate removal mechanism by MgFe layered double hydroxides[J]. Applied Clay Science, 2020, 189:105521.
[25]	LI X W, ZHANG Q W, YANG B. Co-precipitation with CaCO₃ to remove heavy metals and significantly reduce the moisture content of filter residue[J]. Chemosphere, 2020, 239:124660.
[26]	唐明云, 张海路, 段三壮, 等. 基于Langmuir模型温度对煤吸附解吸甲烷影响研究[J]. 煤炭科学技术,2021, 49(5):182-189.
[27]	王诗慧, 刘鹰, 李双, 等. 载铁活性炭对水中低浓度磷酸盐的吸附去除效果[J]. 大连海洋大学学报, 2022, 37(2):276-284.
[28]	胡美艳, 张翔凌, 姬筠森, 等. 两种碳酸系Fe-LDHs负载改性沸石对Cd(Ⅱ)吸附特性对比研究[J]. 环境科学研究, 2021, 34(11):2655-2664.
[29]	JIANG L, CHEN Y T, WANG Y F, et al. Contributions of various Cd(Ⅱ) adsorption mechanisms by phragmites australis-activated carbon modified with mannitol[J]. ACS Omega, 2022, 7(12):10502-10515.
[30]	GAO Y S, QI G S, YAN W C, et al. Preparation of L-cysteine modified MnFe₂O₄ nanoparticles based on high-gravity technology and application for the removal of lead[J]. Journal of Environmental Chemical Engineering, 2022, 10(2):107193.
[31]	MIRZAEE E, SARTAJ M. Activated carbon-based magnetic composite as an adsorbent for removal of polycyclic aromatic hydrocarbons from aqueous phase:characterization, adsorption kinetics and isotherm studies[J]. Journal of Hazardous Materials Advances, 2022, 6:100083.
[32]	ARROYAVE J M, AVENA M, TAN W F, et al. The two-species phosphate adsorption kinetics on goethite[J]. Chemosphere, 2022, 307:135782.
[33]	徐宏祥. 有机废水的煤吸附净化机理研究[D]. 徐州:中国矿业大学, 2015.
[34]	孙晓菲, 陈桂芳, 安东海, 等. 粉末活性焦对水中磷酸盐的吸附性能[J]. 中国环境科学, 2019, 39(9):3797-3806.
[35]	邵立荣, 宋振杨, 冯素敏, 等. 天然与改性沸石对磷酸盐吸附效能及机理研究[J]. 工业水处理, 2018, 38(4):64-68.
[36]	ABUHATAB S, EL-QANNI A, AL-QALAQ H, et al. Effective adsorptive removal of Zn²⁺, Cu²⁺, and Cr³⁺ heavy metals from aqueous solutions using silica-based embedded with NiO and MgO nanoparticles[J]. Journal of Environmental Management, 2020, 268:110713.
[37]	LIU L H, YUE T T, LIU R, et al. Efficient absorptive removal of Cd(Ⅱ) in aqueous solution by biochar derived from sewage sludge and calcium sulfate[J]. Bioresource Technology, 2021, 336:125333.
[38]	唐海燕, 孟宪林, 高大文. 表面改性非烧结生态砖材料对模拟城市暴雨径流中低浓度磷的吸附特性[J]. 环境科学研究, 2019, 32(12):2117-2123.
[39]	何佳宁, 刘春敬, 李思安, 等. 烧结多孔砖基质Fe系改性脱氮除磷效果研究[J]. 河北农业大学学报, 2018, 41(6):104-109.