有机-无机复合固化剂合成及重金属污染底泥固化研究

陈运涛; 肖瑶; 王健男; 高忠帅; 崔美; 黄仁亮

doi:10.13205/j.hjgc.202403010

有机-无机复合固化剂合成及重金属污染底泥固化研究

doi: 10.13205/j.hjgc.202403010

陈运涛^1,2,3,4,
肖瑶⁵,
王健男^1,2,3,4,
高忠帅⁵,
崔美⁵,
黄仁亮^5, ,

1. 中交天津港湾工程研究院有限公司, 天津 300222;
2. 港口岩土工程技术交通运输行业重点实验室, 天津 300222;
3. 天津市港口岩土工程技术重点实验室, 天津 300222;
4. 中交第一航务工程局有限公司, 天津 300222;
5. 天津大学海洋科学与技术学院, 天津 300072

基金项目:

天津市重点研发计划 (18YFHBZC00010)

详细信息

作者简介:
陈运涛(1980-), 男, 高级工程师,主要研究方向为软土地基加固及污染治理。chenyuntao@163.com

通讯作者:
黄仁亮(1985-), 教授,主要研究方向为海洋资源与环境。tjuhrl@tju.edu.cn

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- 被引次数: 0
出版历程
- 收稿日期: 2023-03-29
- 网络出版日期: 2024-05-31

SYNTHESIS OF ORGANIC-INORGANIC COMPOSITE CURING AGENT AND ITS SOLIDIFICATION EFFECT ON HEAVY METAL CONTAMINATED DREDGED SILT

CHEN Yuntao^1,2,3,4,
XIAO Yao⁵,
WANG Jiannan^1,2,3,4,
GAO Zhongshuai⁵,
CUI Mei⁵,
HUANG Renliang^{5
, ,}

1. CCCC Tianjin Port Engineering Institute Co., Ltd., Tianjin 300222, China;
2. Key Laboratory of Port Geotechnical Engineering of the Ministry of Communication, Tianjin 300222, China;
3. Key Laboratory of Port Geotechnical Engineering of Tianjin, Tianjin 300222, China;
4. First Harbor Engineering Co., Ltd., CCCC, Tianjin 300222, China;
5. School of Marine Science and Technology, Tianjin University, Tianjin 300072, China

摘要

摘要: 疏浚重金属污染底泥由于具有含水率高、强度低等特性,无法直接作为工程材料应用,并且会对环境造成污染。设计合成了一种丙烯酸-苯乙烯磺酸共聚物(AA-SSS),并与水泥和纳米水化硅酸钙(早强剂)混合,开发了一种有机-无机复合固化剂。探究了有机-无机复合固化剂对底泥固化抗压强度和重金属离子稳定化的影响,并分析了其机理。结果表明:有机-无机复合固化剂对底泥固化强度增强效果显著,在10%水泥、1% AA-SSS、2%早强剂添加量下,底泥固化1 d的抗压强度为0.85 MPa,相比未加固化剂,提高了467%。在该条件下,底泥中的Pb²⁺、Ni²⁺、Cd²⁺、Cr³⁺的浸出浓度分别从7.05,8.32,4.40,7.12 mg/L降至2.68,2.61,0.68,2.05 mg/L,经固化稳定化后底泥酸浸出液中重金属浓度均低于危险废物鉴别标准值。水泥水化产物加强了淤泥颗粒之间的胶结,并包裹固定金属离子,同时AA-SSS和纳米水化硅酸钙可以分散和促进水泥水化,并通过静电作用和吸附作用固定金属离子。研究表明有机-无机复合固化剂在提高底泥抗压强度和重金属离子稳定化具有良好的应用前景。
- 重金属 /
- 污染底泥 /
- 固化剂 /
- 无侧限抗压强度 /
- 稳定化
Abstract: Dredged silt has the characteristics of high moisture content and low strength, resulting in the inability to be applied directly as an engineering material. It can also pose risk to the environment. In this study, an organic-inorganic composite curing agent was developed, consisting of a synthetic copolymer of acrylic acid and styrenesulphonic acid (AA-SSS), cement, and nano-hydrated calcium silicate (early strength agent). The effect of organic-inorganic composite curing agents on the compressive strength of substrate curing and stabilization of heavy metal ions was investigated and the mechanism was analyzed. The results showed that the organic-inorganic composite curing agent was effective in enhancing the strength of the cured substrate. With the addition of 10% cement, 1% AA-SSS, and 2% early strength agent, the compressive strength of the substrate cured for 1 day was 0.85 MPa, increased by 467% compared to that without the addition of curing agent. Under these conditions, the leaching concentrations of Pb²⁺, Ni²⁺, Cd²⁺, and Cr³⁺ in the sediment decreased from 7.05, 8.32, 4.40 and 7.12 mg/L to 2.68, 2.61, 0.68 and 2.05 mg/L, respectively. The concentrations of heavy metals in the acid leachate of the solidified and stabilized substrate were all below the hazardous waste identification standard values. The cement hydration products enhance the cementation between the silt particles and encapsulate the immobilized metal ions, while AA-SSS and nano-hydrated calcium silicate disperse and promote cement hydration and immobilize the metal ions by electrostatic action and adsorption. The results show that the organic-inorganic composite curing agent has great potential to improve the compressive strength of silt and the stabilization of heavy metal ions.
- heavy metals /
- contaminated sediment /
- curing agent /
- unconfined compression strength /
- stabilization

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参考文献(53)

[1]	MORI N, SUGITANI K, YAMAMOTO M, et al. Major and minor elemental compositions of streambed biofilms and its implications of riverine biogeochemical cycles[J]. Environmental Pollution, 2018, 243:308-317.
[2]	WANG Y N, O'CONNOR D, SHEN Z T, et al. Green synthesis of nanoparticles for the remediation of contaminated waters and soils:constituents, synthesizing methods, and influencing factors[J]. Journal of Cleaner Production, 2019, 226:540-549.
[3]	LU X H, CUI M X, WANG P F, et al. Application in cement soil of stabilizer in silt soft soil of Wuxi in China[J]. Journal of Coastal Research, 2018, 83 (10083):316-323.
[4]	YAO X, ZHANG Z H, ZHU H J, et al. Geopolymerization process of alkali-metakaolinite characterized by isothermal calorimetry[J]. Thermochimica Acta, 2009, 493(1):49-54.
[5]	CUI M, LEE Y, CHOI J, et al. Evaluation of stabilizing materials for immobilization of toxic heavy metals in contaminated agricultural soils in China[J]. Journal of Cleaner Production, 2018, 193:748-758.
[6]	HORPIBULSUK S, PHETCHUAY C, CHINKULKIJNIWAT A. Soil stabilization by calcium carbide residue and fly ash[J]. Journal of Materials in Civil Engineering, 2012, 24(2):184-193.
[7]	SONG F Y, GU L, ZHU N W, et al. Leaching behavior of heavy metals from sewage sludge solidified by cement-based binders[J]. Chemosphere, 2013, 92(4):344-350.
[8]	PENG G Q, TIAN G M, LIU J Z, et al. Removal of heavy metals from sewage sludge with a combination of bioleaching and electrokinetic remediation technology[J]. Desalination, 2011, 271(1):100-104.
[9]	DABROWSKA L, ROSIN'SKA A. Change of PCBs and forms of heavy metals in sewage sludge during thermophilic anaerobic digestion[J]. Chemosphere, 2012, 88(2):168-173.
[10]	HAO H S, XU L H, ZHAI W, et al. Development of Sialon ecomaterials drived from solid waste of containing silican and aluminum[J]. Journal of Inorganic Materials, 2010, 25(11):1121-1127.
[11]	FYTILI D, ZABANIOTOU A. Utilization of sewage sludge in EU application of old and new methods:a review[J]. Renewable & Sustainable Energy Reviews, 2008, 12:116-140.
[12]	YING Z, YOUCAI Z. Stabilization process within a sewage sludge landfill determined through both particle size distribution and content of humic substances as well as by FT-IR analysis[J]. Waste Management & Research, 2010, 29(4):379-385.
[13]	WANG L, YU K, LI J S, et al. Low-carbon and low-alkalinity stabilization/solidification of high-Pb contaminated soil[J]. Chemical Engineering Journal, 2018, 351:418-427.
[14]	WANG L, CHO D W, TSANG D C W, et al. Green remediation of As and Pb contaminated soil using cement-free clay-based stabilization/solidification[J]. Environment International, 2019, 126:336-345.
[15]	BLANCK G, CUISINIER O, MASROURI F. Soil treatment with organic non-traditional additives for the improvement of earthworks[J]. Acta Geotechnica, 2014, 9(6):1111-1122.
[16]	CHEN L, WANG L, CHO D W, et al. Sustainable stabilization/solidification of municipal solid waste incinerator fly ash by incorporation of green materials[J]. Journal of Cleaner Production, 2019, 222:335-343.
[17]	EISAZADEH A, KASSIM K A, NUR H. Morphology and BET surface area of phosphoric acid stabilized tropical soils[J]. Engineering Geology, 2013, 154:36-41.
[18]	GARCÍA LODEIRO I, MACPHEE D E, PALOMO A, et al. Effect of alkalis on fresh C-S-H gels. FTIR analysis[J]. Cement and Concrete Research, 2009, 39(3):147-153.
[19]	HORPIBULSUK S, KATKAN W, APICHATVULLOP A. An approach for assessment of compaction curves of fine grained soils at various energies using a one point test[J]. Soils and Foundations, 2008, 48(1):115-125.
[20]	RACHAN R, RAKSACHON Y. Role of fly ash on strength and microstructure development in blended cement stabilized silty clay[J]. Soils and Foundations, 2009, 49:85-98.
[21]	LATIFI N, RASHID A S A, SIDDIQUA S, et al. Micro-structural analysis of strength development in low- and high swelling clays stabilized with magnesium chloride solution:a green soil stabilizer[J]. Applied Clay Science, 2015, 118:195-206.
[22]	WEN G L,MA Y Z,WANG T, Urban river drenging and sludge-cement blocks making:a case study in Shenzhen Pingshan river[J]. Environmental Engineering, 2018, 36(12):34-37,42.
[23]	ZEZIN A B, MIKHEIKIN S V, ROGACHEVA V B, et al. Polymeric stabilizers for protection of soil and ground against wind and water erosion[J]. Advances in Colloid and Interface Science, 2015, 226:17-23.
[24]	ZHANG M, GUO H, EL-KORCHI T, et al. Experimental feasibility study of geopolymer as the next-generation soil stabilizer[J]. Construction and Building Materials, 2013, 47:1468-1478.
[25]	LIU J, SHI B, JIANG H, et al. Research on the stabilization treatment of clay slope topsoil by organic polymer soil stabilizer[J]. Engineering Geology, 2011, 117(1):114-120.
[26]	RAÐDENOVIĆ D, KERKEZ Ð, PILIPOVIĆ D T, et al. Long-term application of stabilization/solidification technique on highly contaminated sediments with environment risk assessment[J]. Science of the Total Environment, 2019, 684:186-195.
[27]	PAN C G, XIE X Y, GEN J, et al. Effect of stabilization/solidification on mechanical and phase characteristics of organic river silt by a stabilizer[J]. Construction and Building Materials, 2020, 236:117538.
[28]	DU Y J, JIANG N J, SHEN S L, et al. Experimental investigation of influence of acid rain on leaching and hydraulic characteristics of cement-based solidified/stabilized lead contaminated clay[J]. Journal of Hazardous Materials, 2012, 225/226:195-201.
[29]	WANG L, CHEN L, TSANG D C W, et al. Green remediation of contaminated sediment by stabilization/solidification with industrial by-products and CO₂ utilization[J]. Science of the Total Environment, 2018, 631/632:1321-1327.
[30]	WANG Y S, DAI J G, WANG L, et al. Influence of lead on stabilization/solidification by ordinary Portland cement and magnesium phosphate cement[J]. Chemosphere, 2018, 190:90-96.
[31]	LIU S J, JIANG J Y, WANG S, et al. Assessment of water-soluble thiourea-formaldehyde (WTF) resin for stabilization/solidification (S/S) of heavy metal contaminated soils[J]. Journal of Hazardous Materials, 2018, 346:167-173.
[32]	ARASAN S, ISIK F, AKBULUT R, et al. Rapid Stabilization of aands with deep mixing method using polyester[J]. Periodica Polytechnica Civil Engineering, 2015, 59:405-411.
[33]	KOLAY P K, DHAKAL B, KUMAR S, et al. Effect of liquid acrylic polymer on geotechnical properties of fine-grained soils[J]. International Journal of Geosynthetics and Ground Engineering, 2016, 2(4):29.
[34]	RAN Q, SOMASUNDARAN P, MIAO C, et al. Adsorption mechanism of comb polymer dispersants at the cement/water interface[J]. Journal of Dispersion Science and Technology, 2010, 31(6):790-798.
[35]	MENG T, YU Y, WANG Z J. Effect of nano-CaCO₃ slurry on the mechanical properties and micro-structure of concrete with and without fly ash[J]. Composites Part B:Engineering, 2017, 117:124-129.
[36]	MAITRA J, SHUKLA V K. Cross-linking in hydrogels:a review[J]. American Journal of Polymer Science, 2014, 4(2):25-31.
[37]	SEVILAY B, RADMILA T, JOSE M A. Surfactant-free high solids content polymer dispersions[J]. Polymer, 2017, 117:64-75.
[38]	JONES J J, CASE V W. Sampling, handling, and analyzing plant tissue samples[J]. Soil Testing and Plant Analysis, 1990,3(3):389-428.
[39]	PU S Y, ZHU Z D, SONG W L, et al. Mechanical and microscopic properties of cement stabilized silt[J]. KSCE Journal of Civil Engineering, 2020, 24:2333-2344.
[40]	RIVAS B L, MUÑOZ C. Synthesis and metal ion adsorption properties of poly(4-sodium styrene sulfonate-co-acrylic acid)[J]. Journal of Applied Polymer Science, 2009, 114(3):1587-1592.
[41]	STEPKOWSKA E T, AVILES M A, BLANES J M, et al. Gradualtransformation of Ca(OH)₂ into CaCO₃ on cement hydration[J]. Journal of Thermal Analysis and Calorimetry, 2007, 87(1):189-198.
[42]	HORPIBULSUK S, RACHAN R, CHINKULKIJNIWAT A, et al Analysis of strength development in cement-stabilized silty clay form microstructural considerations[J]. Construction and Building Materials, 2010, 24(10):20112021.
[43]	FERRARI L, KAUFMANN J, WINNEFELD F, et al. Multi-method approach to study influence of superplasticizers on cement suspensions[J]. Cement and Concrete Research, 2011, 41(10):1058-1066.
[44]	ZHANG Q, RAN Q P, ZHAO H X, et al. Effect of counterions on comb-like polycarboxylate conformation in aqueous solutions[J]. Journal of Dispersion Science and Technology, 2017, 38(5):721-728.
[45]	PLANK J, HIRSCH C. Impact of zeta potential of early cement hydration phases on superplasticizer adsorption[J]. Cement and Concrete Research, 2007, 37(4):537-542.
[46]	SHA S, WANG M, SHI C, et al. Influence of the structures of polycarboxylate superplasticizer on its performance in cement-based materials:a review[J]. Construction and Building Materials, 2020, 233:117257.
[47]	SUN J F, SHI H, QIAN B B, et al. Effects of synthetic C-S-H/PCE nanocomposites on early cement hydration[J]. Construction and Building Materials, 2017, 140:282-292.
[48]	HUANG G X, LIU R P, YANG R J, et al. Research process of risk management and control and their application requirements for farmland soil heavy metal contamination in China[J]. Environmental Engineering, 2022, 40(1):216-223.
[49]	WON E J, KIM K T, CHOI J Y, et al. Target organs of the Manila clam Ruditapes philippinarum for studying metal accumulation and biomarkers in pollution monitoring:laboratory and in-situ transplantation experiments[J]. Environmental Monitoring and Assessment, 2016, 188(8):478.
[50]	KOMÁREK M, ANTELO J, KRÁLOVÁ M, et al. Revisiting models of Cd, Cu, Pb and Zn adsorption onto Fe(Ⅲ) oxides[J]. Chemical Geology, 2018, 493:189-198.
[51]	XIAO Y, WU Z J, CUI M, et al. Co-modification of biochar and bentonite for adsorption and stabilization of Pb²⁺ ions[J]. Journal of Inorganic Materials, 2021, 36(10):1083-1090.
[52]	PAN Z Q, ZHANG S Q, R D J, Effects of direct application of sewage sludge on soil remediation in abandoned mining area[J]. Environmental Engineering, 2019, 37(11):189-193,183.
[53]	WIESŁAWA N W, BARBARA T, SYLWIA D. The properties of cement pastes and mortars processed with some heavy metal nitrates containing solutions[J]. Procedia Engineering, 2015, 108:72-79.