建筑垃圾对雨水径流中磷的吸附特性
Adsorption characteristics of construction waste for phosphorus removal from stormwater runoff
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摘要: 以经过筛分、破碎等预处理后的砖砼建筑垃圾为研究对象,采用人工模拟雨水径流,通过静态吸附、动态吸附和脱附实验,研究了不同粒径粒级建筑垃圾对雨水径流中磷酸根的吸附效果和脱附特征.结果表明,建筑垃圾对磷酸根的吸附过程更符合准二级动力学模型,Langmuir等温模型能较好地描述其等温吸附过程;粒径粒级对建筑垃圾吸附磷酸根的效果具有重要影响,粒径粒级越小,对磷的去除效率越高,1-2.5 mm粒径的建筑垃圾对磷酸根去除率最大,其值为55%,建筑垃圾的粒径对磷的吸附平衡时间、吸附速率和吸附量也具有较大影响,粒径粒级1-2.5 mm的建筑垃圾对磷酸根的平衡吸附量最大值为7.8 μg·g-1.建筑垃圾吸附的磷酸根在雨水径流pH值为5-9的范围内溶出风险较小.Abstract: The adsorption and desorption of phosphate from stormwater runoff by construction waste of different particle size were characterized in this study. Static adsorption, dynamic adsorption, and desorption experiments were carried out, with pretreated (e.g., screening and crushing) brick-concrete construction waste and artificially simulated stormwater runoff. The pseudo-second-order kinetic model was found to explain the adsorption process of phosphate onto construction waste most effectively, and the Langmuir isotherm model fitted the isothermal adsorption process well. Furthermore, the particle size of the construction waste significantly affected the adsorption of phosphate, with the smaller the particle size, the higher the phosphate removal rate. The maximum phosphate removal (55%) was observed at a particle size of 1-2.5 mm. Moreover, the particle size also strongly affected the adsorption equilibrium time, rate and capacity of phosphate onto construction waste, with maximum capacity (7.8 μg·g-1) observed at a particle size of 1-2.5 mm. Lower risk of desorption was found at a pH of 5-9 of the stormwater runoff.
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Key words:
- construction waste /
- stormwater runoff /
- phosphate /
- adsorption law
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[1] 李浩,翟宝辉.中国建筑垃圾资源化产业发展研究[J].城市发展研究,2015,22(3):119-124. LI H, ZHAI B H. Policy research on promoting recycling construction waste in China[J]. Urban Studies, 2015, 22(3):119-124(in Chinese).
[2] 周文娟,陈家珑,路宏波.我国建筑垃圾资源化现状及对策[J].建筑技术,2009,40(8):741-744. ZHOU W J, CHEN J L, LU H B. Status and countermeasures of domestic construction waste resources[J]. Architecture Technology, 2009, 40(8):741-744(in Chinese).
[3] GRACE M A, CLIFFORD E, HEALY M G. The potential for the use of waste products from a variety of sectors in water treatment processes[J]. Journal of Cleaner Production, 2016, 137:788-802. [4] YOU Z Y,ZHANG L,PAN S Y,et al. Performance evaluation of modified bioretention systems with alkaline solid wastes for enhanced nutrient removal from stormwater runoff[J]. Water Research,2019,161:61-73. [5] [6] 邓国斌,罗刚,王莉芸,等.深圳市梅坳道路新型浅草沟试验研究[J].给水排水, 2016(S1):168-172. DENG G B, LUO G, WANG L Y, et al. Study on a new type of shallow grass ditch in Meide Road, Shenzhen[J]. Water & Wastewater Engineering, 2016 (S1):168-172(in Chinese).
[7] 王建龙,杨丽琼,黄涛,等.建筑垃圾对雨水径流中Cu的吸附特性[J].环境工程学报,2015,9(1):32-38. WANG J L,YANG L Q,HUANG T, et al. Absorption characteristics of construction wastes to Cu from urban stormwater runoff[J]. Chinese Journal of Environmental Engineering, 2015, 9(1):32-38(in Chinese).
[8] YANG L Q,WANG J L,ZHANG X R, et al. Adsorption characteristics of Pb from urban stormwater runoff by construction wastes[J]. Journal of Southeast University(English Edition), 2014, 30(2):212-219. [9] 张志民.利用建筑垃圾收集雨水技术研究[J].中国资源综合利用,2004(3):16-18. ZHANG Z M. Research on rain water technology of collecting construction waste[J]. China Resources Comprehensive Utilization, 2004 (3):16-18(in Chinese).
[10] 王晓璐,左剑恶,干里里,等.复合填料生物渗滤系统处理城市雨水径流的研究[J].环境科学,2015,36(7):2518-2524. WANG X L, ZUO J E, QIAN L L, et al. Treatment of urban runoff pollutants by a multilayer biofiltration system[J]. Environmental Science, 2015,36(7):2518-2524(in Chinese).
[11] 欧阳威,王玮,郝芳华, 等.北京城区不同下垫面降雨径流产污特征分析[J].中国环境科学,2010,30(9):1249-1256. OUYANG W, WANG W, HAO F H, et al.Pollution characterization of urban stormwater runoff on different underlying surface conditions[J]. China Environmental Science, 2010, 30(9):1249-1256(in Chinese).
[12] 陈翀宇,付广义,赵媛媛,等.给水厂残泥-海藻酸钠胶珠对磷的吸附特性[J].环境化学,2019,38(3):599-606. CHEN C Y,FU G Y,ZHAO Y Y, et al. Adsorption characteristics of phosphorus on drinking water treatment residuals-sodium alginate beads[J]. Environmental Chemistry,2019,38(3):599-606(in Chinese).
[13] 方伟成,王静,周新萍.三种填料吸附磷的特性及其影响因素[J].湿地科学,2018,16(3):341-346. FANG W C, WANG J, ZHOU X P. Characteristics and influencing factors of phosphorus adsorption by three fillers[J]. Wetland Science, 2018, 16(3):341-346(in Chinese).
[14] 李琼辉,于伟鹏,李小荣, 等.6种人工湿地填料对氮·磷的吸附效果研究[J].安徽农业科学,2016,44(4):83-86. LI Q H,YU W P, LI X R, et al. Study on the adsorption effect of six artificial wetland substrates on nitrogen and phosphorus[J]. Journal of Anhui Agricultural Sciences, 2016, 44(4):83-86(in Chinese).
[15] 刘杰,朱宗强,朱义年,等. 白果壳遗态Fe/C复合材料对水中磷的吸附特征[J].环境科学研究,2019,32(7):1239-1249. LIU J, ZHU Z Q, ZHU Y N, et al. Adsorption characteristics of phosphate in water by the porous biomorph-genetic composite of Fe/C with ginkgo shell template[J]. Research of Environmental Sciences, 2019, 32(7):1239-1249(in Chinese).
[16] 梁越敢,方涛,李伟, 等. 磁性龙虾壳吸附去除水中磷的特性[J].中国环境科学,2019,39(5):1928-1933. LIANG Y G, FANG T, LI W, et al. Characteristics of phosphorus adsorption by magnetic lobster shell[J]. China Environmental Science, 2019, 39(5):1928-1933(in Chinese).
[17] 封吉猛. 人工湿地红壤基质填料的除磷性能与机理研究[D].上海:上海交通大学,2013. FENG J M. Research on phosphorus removal performance and mechanism of the red soil substrate fillings in constructed wetlands[D]. Shanghai:Shanghai Jiao Tong University,2013(in Chinese). [18] WEI L J, LIANG Z Z, FU Z J, et al. Efficiency and mechanics of surfactant modified zeolite with nitrate adsorbed to control nitrogen and phosphorus release from sediments[J]. Environmental Science, 2008, 29(2):356-361. [19] 王章鸿,郭海艳,沈飞,等.热解条件对生物炭性质和氮、磷吸附性能的影响[J].环境科学学报,2015,35(9):2805-2812. WANG H Z,GUO H Y,SHENG F,et al. Effects of pyrolysis conditions on the properties of biochar and its adsorption to N and P from aqueous solution[J]. Acta Scientiae Circumstantiae,2015,35(9):2805-2812(in Chinese).
[20] 唐登勇,黄越,胥瑞晨,等.改性芦苇生物炭对水中低浓度磷的吸附特征[J].环境科学,2016,37(6):2195-2201. TANG D Y,HUANG Y,XU R N,et al. Adsorption behavior of low concentration phosphorus from water onto modified reed biochar[J]. Environmental Science, 2016,37(6):2195-2201(in Chinese).
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