采用铁钛复合材料固定土壤中的砷

闫秀懿; 古志彬; 李志萌; 秦禹; 邓萌

doi:10.13205/j.hjgc.202308023

采用铁钛复合材料固定土壤中的砷

doi: 10.13205/j.hjgc.202308023

中国石油大学(北京) 化学工程与环境学院, 北京 102249

详细信息

作者简介:
闫秀懿(1975-),女,副教授,主要研究方向为土壤污染防治。yanxiuyi@cup.edu.cn

通讯作者:
闫秀懿(1975-),女,副教授,主要研究方向为土壤污染防治。yanxiuyi@cup.edu.cn

计量
- 文章访问数: 35
- HTML全文浏览量: 2
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2022-08-11
- 网络出版日期: 2023-11-15

ARENIC IMMOBILIZATION IN SOIL USING IRON/TITANIUM COMPOSITE

College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China

摘要

摘要: 固定化修复是常见的含砷土壤修复方法,合理选择固化剂至关重要。根据土壤中砷的特性,分别合成了铁钛复合材料和生物炭改性的铁钛复合材料,探究2种材料对土壤中砷固化的效果,并采用吸附等温模型、吸附动力学模型等对其吸附特性进行研究。结果表明:生物炭改性的铁钛复合材料的吸附效果优于铁钛复合材料;通过吸附动力学模型拟合发现最佳模型为Elovich模型,说明2种材料对三价砷[As(Ⅲ)]的吸附机制主要为化学吸附;吸附等温实验中最佳模型为Freundlich等温吸附模型,表明As(Ⅲ)在2种材料表面的吸附为非均相多分子吸附和单层吸附,同时包括物理和化学吸附。上述2种吸附材料均能较好地吸附土壤中的As,最大吸附量分别为48.63,61.09 mg/g。通过添加生物炭可有效提高材料的吸附速率,实现短期内快速稳定土壤中As的效果,且在不同含水率条件下均具有较高的As固定化效果。研究结果可为探索新型的复合材料用以固定土壤中的As提供借鉴。
- 土壤砷污染 /
- 铁钛复合材料 /
- 铁钛生物炭复合材料 /
- 浸出毒性 /
- 吸附等温模型
Abstract: At present, immobilization is one of the most common remediation methods for arsenic-contained soil. Reasonable selection of immobilization reagents is very important in soil immobilization remediation. According to the characteristics of arsenic in soil, this study synthesized Fe/Ti composite material and the modified Fe/Ti composite material by biochar, to explore the effect of immobilization of arsenic in soil, respectively. The adsorption isothermal model and adsorption kinetics model was used to study the adsorption characteristics. The experimental results showed that the adsorption effect of biochar-modified Fe-Ti composite material was better than that of Fe-Ti composite material. The Elovich model was found to be the best kinetics model in fitting the adsorption process, indicating that the adsorption of trivalent arsenic by the two materials was mainly chemical adsorption. The Freundlich isothermal adsorption model was the best model in the adsorption isothermal experiment, which showed that the adsorption of trivalent arsenic on the surface of the two materials was heterogeneous multimolecular adsorption and monolayer adsorption, including physical and chemical adsorption. These two adsorbents can effectively adsorb arsenic in soil, and the maximum adsorption amount is 48.63 and 61.09 mg/g, respectively. By adding biochar, the adsorption rate of the material can be effectively improved, rapid stabilization of arsenic in soil can be achieved, and the immobilization effect of arsenic is higher under different water contents in soil. It can provide a reference for arsenic removal from soil by biochar-modified iron titanium composite.
- soil arsenic pollution /
- Fe/Ti composite material /
- Fe/Ti biochar composite material /
- leaching toxicity /
- adsorption isothermal model

HTML全文

参考文献(28)

[1]	李芙荣.土壤修复技术研究综述[J].清洗世界,2021,37(1):125-126.
[2]	HUANG Y,WANG L Y,WANG W J,et al.Current status of agricultural soil pollution by heavy metals in China:a meta-analysis[J].Science of the Total Environment,2019,651:3034-3042.
[3]	龙良俊,宋雪婷,潘宝宇,等.砷污染土壤修复技术综述[J].应用化工,2020,49(10):2649-2653.
[4]	陈婷,朱志良.铁基水处理材料除砷技术的研究进展[J].化学通报,2018,81(10):880-889.
[5]	HONG J,ZHU Z L,LU H T,et al.2014.Synthesis and arsenic adsorption performances of ferric-based layered double hydroxide with α-alanine intercalation[J].Chemical Engineering Journal,252:267-274.
[6]	ZHANG G S,QU J H,LIU H J,et al.Preparation and evaluation of a novel Fe-Mn binary oxide adsorbent for effective arsenite removal[J].Water Research.2007,41(9):1921-1928.
[7]	DAHL M,LIU Y D,YIN Y D.Composite titanium dioxide nanomaterials[J].Chemical reviews,2014,114:9853-9889.
[8]	邓敏.铁钛复合氧化物及其砷吸附性能研究[D].厦门:厦门大学,2019.
[9]	NIU H Y,WANG J M,SHI Y L,et al.Adsorption behavior of arsenic onto protonated titanate nanotubes prepared via hydrothermal method[J].Microporous Mesoporous Mater,2009,122:28-35.
[10]	YANG H,LIN W Y,RAJESHWAR K.Homogeneous and heterogeneous photocatalytic reactions involving As(Ⅲ) and As(Ⅴ) species in aqueous media[J].Journal of Photochemistry and Photobiology A:Chemistry,1999,123(1/2/3):137-143.
[11]	SHARMA V K,DUTTA P K,RAY A K.Review of kinetics of chemical and photocatalytical oxidation of arsenic (Ⅲ) as influenced by pH[J].Journal of Environmental Science and Health,Part A,2007,42(7):997-1004.
[12]	MOLL J,KLINGENFUSS F,WIDMER F,et al.Effects of titanium dioxide nanoparticles on soil microbial communities and wheat biomass[J].Soil Biology & Biochemistry,2017,111:85-93.
[13]	ZHAI Y J,CHEN L H,LIU G,et al.Compositional and functional responses of bacterial community to titanium dioxide nanoparticles varied with soil heterogeneity and exposure duration[J].Science of the Total Environment,2021,773:144895.
[14]	张伟.新型复合铁钛锰吸附剂的研制及其除砷效能与机制研究[D].哈尔滨:哈尔滨工业大学,2019.
[15]	邓敏.铁钛复合氧化物及其砷吸附性能研究[D].厦门:厦门大学,2019.
[16]	汪赛奇.Fe-Ti复合氧化物的制备、表征及其对饮用水中As(Ⅴ)的吸附研究[D].合肥:安徽建筑大学,2014.
[17]	万祥.湖南某矿区土壤砷污染特征及化学固定修复实验研究[D].北京:北京化工大学,2017.
[18]	SU B L,LIN J J,OWENS G,et al.Impact of green synthesized iron oxide nanoparticles on the distribution and transformation of As species in contaminated soil[J].Environmental Pollution,2020,258(1):113668.
[19]	陈同斌,韦朝阳,黄泽春,等.砷超富集植物蜈蚣草及其对砷的富集特征[J].科学通报,2002(3):207-210.
[20]	ALIDOKHT L,ANASTOPOULOS I,NTARLAGIANNIS D,et al.Recent advances in the application of nanomaterials for the remediation of arsenic-contaminated water and soil[J].Journal of Environmental Chemical Engineering,2021,9:105533.
[21]	SAHU U K,SAHU S,MAHAPATRA S S,et al.Synthesis and characterization of magnetic bio-adsorbent developed from Aegle marmelos leaves for removal of As(Ⅴ) from aqueous solutions[J].Environmental Science and Pollution Research,2019,26(1):946-958.
[22]	GUGUSHE A S,NQOMBOLO A,NOMNGONGO P N.Application of response surface methodology and desirability function in the optimization of adsorptive remediation of arsenic from acid mine drainage using magnetic nanocomposite:equilibrium studies and application to real samples[J].Molecules,2019,24(9):1792.
[23]	SHAIKH W A,ALAM M A,ALAM M O,et al.Enhanced aqueous phase arsenic removal by a biochar based iron nanocomposite[J].Environmental Technology & Innovation,2020,19:100936.
[24]	YANG J J,MA T X,LI X Q,et al.Removal of heavy metals and metalloids by amino-modified biochar supporting nanoscale zero-valent Iron[J].Journal of Environmental Quality,2018,47(5):1196-1204.
[25]	SHERLALA A,RAMAN A,BELLO M,et al.Adsorption of arsenic using chitosan magnetic graphene oxide nanocomposite[J].Journal of Environmental Management,2019,246:547-556.
[26]	VICKERS N J.Animal communication:when i’m calling you,will you answer too[J].Current Biology,2017,27(14):713-715.
[27]	LIU P P,LIANG Q W,LUO H J,et al.Synthesis of nano-scale zero-valent iron-reduced graphene oxide-silica nano-composites for the efficient removal of arsenic from aqueous solutions[J].Environmental Science and Pollution Research,2019,26(32):33507-33516.
[28]	DENG M,WU X D,ZHU A M,et al.Well-dispersed TiO₂ nanoparticles anchored on Fe₃O₄ magnetic nanosheets for efficient arsenic removal[J].Journal of Environmental Management,2019,237:63-74.