ZHANG Wenjie, LI Xibin, HUANG Jinxiang. Remediation of As(Ⅲ)-contaminated soils using Fe-Mn oxides-modified biochar[J]. Chinese Journal of Geotechnical Engineering, 2025, 47(6): 1327-1333. DOI: 10.11779/CJGE20240209
    Citation: ZHANG Wenjie, LI Xibin, HUANG Jinxiang. Remediation of As(Ⅲ)-contaminated soils using Fe-Mn oxides-modified biochar[J]. Chinese Journal of Geotechnical Engineering, 2025, 47(6): 1327-1333. DOI: 10.11779/CJGE20240209

    Remediation of As(Ⅲ)-contaminated soils using Fe-Mn oxides-modified biochar

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    • Received Date: March 10, 2024
    • Available Online: September 28, 2024
    • The biochar (BC) has been widely used in treatment of heavy metals-contaminated water and soil. However, it is not effective in stabilizing As(Ⅲ) in soils due to the electrostatic repulsion between the biochar and the anion group As. The iron-manganese oxides-modified biochar (FMO-BC) is proposed for remediation of As(Ⅲ)-contaminated soils. The manganese oxide can oxidize As(Ⅲ) into less mobile As(Ⅴ), and the iron oxide can stabilize As(Ⅴ), while the biochar loading can avoid the aggregation of iron-manganese oxides (FMO). The remediation effectiveness and mechanisms are investigated through the synthetic precipitation leaching procedure, bioavailability tests, sequential extraction procedure and a series of spectroscopic/microscopic analyses. The results show that the remediation of FMO-BC is significantly more effective than FMO. At a 7% FMO-BC dosage, the stabilization efficiency reaches 98.6%. After the biochar support, more active sites are obtained for FMO to react with As, and therefore the bioavailability is reduced. The neutralizing actions of that of FMO with biochar avoids a significant increase in soil pH, thereby reduces the As leaching associated with high pH. A lot of As is transformed into stable forms after the FMO-BC remediation, thus reducing the environmental risks of As. 86.9% of As(Ⅲ) is oxidized to As(Ⅴ) by FMO-BC. The oxidation, adsorption, complexation and precipitation reactions are the main mechanisms involved in As stabilization.
    • [1]
      ZHOU S J, DU Y J, SUN H Y, et al. Evaluation of the effectiveness of ex-situ stabilization for arsenic and antimony contaminated soil: short-term and long-term leaching characteristics[J]. The Science of the Total Environment, 2022, 848: 157646. doi: 10.1016/j.scitotenv.2022.157646
      [2]
      LIU X M, SONG Q J, TANG Y, et al. Human health risk assessment of heavy metals in soil-vegetable system: a multi-medium analysis[J]. The Science of the Total Environment, 2013, 463/464: 530-540. doi: 10.1016/j.scitotenv.2013.06.064
      [3]
      周实际, 杜延军, 倪浩, 等. 压实度对铁盐稳定化砷、锑污染土特性的影响及机制研究[J]. 岩土力学, 2022, 43(2): 432-442.

      ZHOU Shiji, DU Yanjun, NI Hao, et al. Mechanisms analysis of the effect of compaction degree on the properties of arsenic and antimony co-contaminated soil stabilized by ferric salts[J]. Rock and Soil Mechanics, 2022, 43(2): 432-442. (in Chinese)
      [4]
      张文杰, 余海生, 蒋墨翰. 预氧化-稳定化-固化联合修复As(Ⅲ)污染土[J]. 岩土工程学报, 2023, 45(6): 1231-1239. doi: 10.11779/CJGE20220279

      ZHANG Wenjie, YU Haisheng, JIANG Mohan. Combined remediation of As(Ⅲ)-contaminated soils by pre-oxidation, stabilization and solidification[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(6): 1231-1239. (in Chinese) doi: 10.11779/CJGE20220279
      [5]
      CUNDY A B, HOPKINSON L, WHITBY R L D. Use of iron-based technologies in contaminated land and groundwater remediation: a review[J]. The Science of the Total Environment, 2008, 400(1/2/3): 42-51.
      [6]
      赵慧敏. 铁盐—生石灰对砷污染土壤固定/稳定化处理技术研究[D]. 北京: 中国地质大学(北京), 2010.

      ZHAO Huimin. Study on Fixation/Stabilization Technology of Arsenic Contaminated Soil by Iron Salt-Quicklime[D]. Beijing: China University of Geosciences, 2010. (in Chinese)
      [7]
      XENIDIS A, STOURAITI C, PAPASSIOPI N. Stabilization of Pb and As in soils by applying combined treatment with phosphates and ferrous iron[J]. Journal of Hazardous Materials, 2010, 177(1/2/3): 929-937.
      [8]
      WU D L, ZONG Y, TIAN Z Y, et al. Role of reactive oxygen species in As(Ⅲ) oxidation by carbonate structural Fe(Ⅱ): a surface-mediated pathway[J]. Chemical Engineering Journal, 2019, 368: 980-987. doi: 10.1016/j.cej.2019.02.204
      [9]
      CHOPPALA G, BOLAN N, KUNHIKRISHNAN A, et al. Differential effect of biochar upon reduction-induced mobility and bioavailability of arsenate and chromate[J]. Chemosphere, 2016, 144: 374-381. doi: 10.1016/j.chemosphere.2015.08.043
      [10]
      ZHANG G S, LIU H J, QU J H, et al. Arsenate uptake and arsenite simultaneous sorption and oxidation by Fe-Mn binary oxides: influence of Mn/Fe ratio, pH, Ca2+, and humic acid[J]. Journal of Colloid and Interface Science, 2012, 366(1): 141-146. doi: 10.1016/j.jcis.2011.09.058
      [11]
      ZHOU Q W, LIAO B H, LIN L N, et al. Adsorption of Cu(Ⅱ) and Cd(Ⅱ) from aqueous solutions by ferromanganese binary oxide-biochar composites[J]. The Science of the Total Environment, 2018, 615: 115-122. doi: 10.1016/j.scitotenv.2017.09.220
      [12]
      CAO X D, MA L N, LIANG Y, et al. Simultaneous immobilization of lead and atrazine in contaminated soils using dairy-manure biochar[J]. Environmental Science & Technology, 2011, 45(11): 4884-4889.
      [13]
      MOHAN D, JR PITTMAN C U. Arsenic removal from water/wastewater using adsorbents: a critical review[J]. Journal of Hazardous Materials, 2007, 142(1/2): 1-53.
      [14]
      HERATH I, ZHAO F J, BUNDSCHUH J, et al. Microbe mediated immobilization of arsenic in the rice rhizosphere after incorporation of silica impregnated biochar composites[J]. Journal of Hazardous Materials, 2020, 398: 123096. doi: 10.1016/j.jhazmat.2020.123096
      [15]
      LI L F, ZHU C X, LIU X S, et al. Biochar amendment immobilizes arsenic in farmland and reduces its bioavailability[J]. Environmental Science and Pollution Research International, 2018, 25(34): 34091-34102. doi: 10.1007/s11356-018-3021-z
      [16]
      YU Z H, QIU W W, WANG F, et al. Effects of manganese oxide-modified biochar composites on arsenic speciation and accumulation in an indica rice (Oryza sativa L) cultivar[J]. Chemosphere, 2017, 168: 341-349. doi: 10.1016/j.chemosphere.2016.10.069
      [17]
      WANG L W, OK Y S, TSANG D C W, et al. New trends in biochar pyrolysis and modification strategies: feedstock, pyrolysis conditions, sustainability concerns and implications for soil amendment[J]. Soil Use and Management, 2020, 36(3): 358-386. doi: 10.1111/sum.12592
      [18]
      FRESNO T, MORENO-JIMÉNEZ E, PEÑALOSA J M. Assessing the combination of iron sulfate and organic materials as amendment for an arsenic and copper contaminated soil, a chemical and ecotoxicological approach[J]. Chemosphere, 2016, 165: 539-546. doi: 10.1016/j.chemosphere.2016.09.039
      [19]
      TESSIER A, CAMPBELL P G C, BISSON M. Sequential extraction procedure for the speciation of particulate trace metals[J]. Analytical Chemistry, 1979, 51(7): 844-851. doi: 10.1021/ac50043a017
      [20]
      LI J S, BEIYUAN J Z, TSANG D C W, et al. Arsenic-containing soil from geogenic source in Hong Kong: leaching characteristics and stabilization/solidification[J]. Chemosphere, 2017, 182: 31-39. doi: 10.1016/j.chemosphere.2017.05.019
      [21]
      WANG Y, GU K, WANG H S, et al. Remediation of heavy-metal-contaminated soils by biochar: a review[J]. Environmental Geotechnics, 2022, 9(3): 135-148.
      [22]
      DU Y J, WEI M L, REDDY K R, et al. New phosphate-based binder for stabilization of soils contaminated with heavy metals: leaching, strength and microstructure characterization[J]. Journal of Environmental Management, 2014, 146: 179-188. doi: 10.1016/j.jenvman.2014.07.035
      [23]
      FAN J, CHEN X, XU Z B, et al. One-pot synthesis of nZVI-embedded biochar for remediation of two mining arsenic-contaminated soils: arsenic immobilization associated with iron transformation[J]. Journal of Hazardous Materials, 2020, 398: 122901. doi: 10.1016/j.jhazmat.2020.122901
      [24]
      LI J S, XUE Q, FANG L, et al. Characteristics and metal leachability of incinerated sewage sludge ash and air pollution control residues from Hong Kong evaluated by different methods[J]. Waste Management, 2017, 64: 161-170. doi: 10.1016/j.wasman.2017.03.033
      [25]
      FREITAS E T F, MONTORO L A, GASPARON M, et al. Natural attenuation of arsenic in the environment by immobilization in nanostructured hematite[J]. Chemosphere, 2015, 138: 340-347. doi: 10.1016/j.chemosphere.2015.05.101
      [26]
      TU Y L, ZHAO D Y, GONG Y Y, et al. Field demonstration of on-site immobilization of arsenic and lead in soil using a ternary amending agent[J]. Journal of Hazardous Materials, 2022, 426: 127791. doi: 10.1016/j.jhazmat.2021.127791

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