References

1. S.-F. Lim, A.Y.W. Lee, Kinetic study on removal of heavy metal ions from aqueous solution by using soil, Environ. Sci. Pollut. Res. Int., 22 (2015) 10114–10158.
2. L. Shukla, N. Jain, A review on soil heavy metals contamination: effects, sources and remedies, Appl. Ecol. Environ. Sci., 10 (2022) 15–18.
3. J. Du, Z. Wang, J. Liu, S. Zhong, C. Wei, Distribution characteristics of soil heavy metals, their source identification and their changes influenced by anthropogenic cultivation activities in purple hilly regions of Sichuan basin, China, J. Soil Sci. Plant Nutr., 20 (2020) 1080–1091.
4. M.F. Chen, Review on heavy metal remediation technology of soil and groundwater at industrially contaminated site in China, Bull. Chin. Acad. Sci., 29 (2014) 327–335.
5. M. Ahmad, S.S. Lee, S.E. Lee, M.I. Al-Wabel, D. Tsang, Y.S. Ok, Biochar-induced changes in soil properties affected immobilization/mobilization of metals/metalloids in contaminated soils, J. Soil Sediment, 17 (2017) 717–730.
6. Z.H. Huang, Y.Z. Li, W.J. Chen, J.H. Shi, N. Zhang, X.J. Wang, Z. Li, L.Z. Gao, Y.X. Zhang, Modified bentonite adsorption of organic pollutants of dye waste water, Mater. Chem. Phys., 202 (2017) 266–276.
7. X.D. Jin, H.J. Ma, G.Q. Zeng, H. Wu, Discussion on remediation effect and mechanism of new soil amendment on water-soil compound heavy metal pollution, Environ. Eng., 37 (2019) 17–22.
8. B. Li, Y.J. Yan, J.Y. Zhang, Y.F. Pan, H.N. Xiao, Z.G. Xuan, Z.H. Huang, Adsorption properties of ethylenediamine modified sawdust for As(V) removal from wastewater, Ion Exch. Adsorpt., 34 (2018) 29–39.
9. J.X. Yi, Z.P. Huo, M.A. Asiri, K.A. Alamry, J.X. Li, Application of agroforestry waste biomass adsorption materials in water pollution treatment, Prog. Chem., 31 (2019) 760–772.
10. H. Deng, L. Zhu, D. Wang, L. Ren, W. Li, Effect of modified bentonite on copper migration via bank soils in the Jialing River, Southwest China, Soil Tillage Res., 218 (2022) 105322–105331.
11. W.B. Li, L. Zhu, H.Y. Deng, Y.F. Zhang, J. Xie, X.Y. Chen, T. Li, Z.F. Meng, Effect of biochar application on adsorption of copper by riverbank soils, Earth Environ., 48 (2020) 250–257.
12. D.Y. Li, R.J. Yang, H.Y. Luo, S.T. Liu, Y.L. Liu, O. Peng, B.Q. Tie, Effect of adsorption of cadmium from aqueous solution by hexadecyl trimethylammonium bromide modified biochar, Chin. J. Environ. Eng., 13 (2019) 1809– nnooiv b/821.
13. Y. Qiu, Q. Zhang, M. Li, Z.X. Fan, W.J. Sang, C.F.Y. Xie, D.Y. Niu, Adsorption of Cd(II) from aqueous solutions by modified biochars: comparison of modification methods, Water Air Soil Pollut., 230 (2019) 84–95.
14. W.B. Li, Z. Liu, Z.F. Meng, S. Ren, S.E. Xu, Y. Zhang, M.Y. Wang, Composite modification mechanism of cationic modifier to amphoteric modified kaolin and its effects on surface characteristics, Int. J. Environ. Sci. Technol., 13 (2016) 2639–2648.
15. A.S. Han, T. Ahn, Effect of capillary number on the residual saturation of colloidal dispersions stabilized by a zwitterionic surfactant, Appl. Sci., 11 (2021) 524–532.
16. J. Xie, H.Y. Deng, L. Zhu, Y.F. Zhang, W.B. Li, D. Wang, Z.F. Meng, Preparation of amphoteric modified magnetized carbon and its adsorption to Cu(II), Desal. Water Treat., 194 (2020) 180–186.
17. S.B. Bu, Z.F. Meng, S. Yek, M.F. Zhang, T. Wang, S. Ren, L.K. Zhang, Adsorption and interaction of Cu²⁺ and Pb²⁺ on BS-12 amphoteric modified bentonites, Environ. Sci., 40 (2019) 4611–4619.
18. T. Xie, Z.F. Meng, H.Y. Lu, W. Liu, D. Bai, K. Tian, Studies on Cr(VI) and Cd²⁺ adsorption on BS-12+DAS complex modified bentonite, Acta Sci. Circum., 38 (2018) 2833–2841.
19. K.R. Miriam, L.S. Kate, S. Laura, An appraisal of microwaveassisted Tessier and BCR sequential extraction methods for the analysis of metals in sediments and soils, J. Soil Sediment, 11 (2011) 518–528.
20. A. Kicińska, R. Pomykaa, M. Izquierdo-Diaz, Changes in soil pH and mobility of heavy metals in contaminated soils, Eur. J. Soil Sci., 6 (2021) 13203–13216.
21. M.M. Qiao, H.B. Ji, X.F. Zhu, Y. Chen, Fraction distribution and risk assessment of heavy metals in sediments of inflow rivers of Miyun Reservoir, Acta Sci. Circum., 33 (2013) 3324–3333.
22. Z.F. Meng, N. Gong, R.H. Li, Z.Q. Zhang, Y.P. Zhang, Adsorption of aniline on an organic modified Lou soil, Chin. J. Soil Sci., 39 (2008) 143–149.
23. K. Kadirvelu, M. Kavipriya, C. Karthika, N. Vennilamani, S. Pattabhi, Mercury(II) adsorption by activated carbon made from sago waste, Carbon, 42 (2004) 745–752.
24. X.L. Li, W.B. Li, H.Y. Deng, T. Li, D. Wang, Enhanced adsorption of Cu²⁺ on purple soil by amphoteric-modified materials, Desal. Water Treat., 196 (2020) 150–158.
25. J.Y. Liu, G.H. Huang, J.Q. Deng, K. Liu, Y.B. Xie, Adsorbent prepared from waste pomelo peel and its adsorption of Pb²⁺ in wastewater, J. Ecol. Rural Environ., 28 (2012) 187–191.
26. Q. Liang, H.Y. Deng, W.B. Li, X.L. Hu, Y. Yang, Effect of coexistence of BS-12 on the adsorption stability and morphology of copper in coastal soil, Fresenius Environ. Bull., 29 (2020) 9429–9437.
27. X.L. Zhong, S.L. Zhou, M.L. Huang, Q.G. Zhao, Chemical form distribution characteristic of soil heavy metals and its influencing factors, Ecol. Environ. Sci., 18 (2009) 1266–1273.