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Volume 40 Issue 7
Sep.  2022
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2022  >  40(7): 31-37
LV Shuangru, JIN Yanjun, LIU Guotao, REN Fumin, XI Chenggang, LU Tong, ZHU Jintong, ZHANG Chao. CHARACTERISTICS OF RESIDENTIAL DECORATION WASTE GENERATION AND MANAGEMENT COUNTERMEASURES:A CASE STUDY ON OLD PALACE AREA IN DAXING DISTRICT,BEIJING[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(7): 186-192. doi: DOI:10.13205/j.hjgc.202207027
Citation: WAN Qinli, LI Qin, PANG Yin, ZHAO Cong, HUANG Tao, ZHAO Rui, PENG Daoping. FEASIBILITY OF SOILIFICATION OF PHOSPHOGYPSUM DEALKALIZED RED MUD BY APPLYING FULVIC ACID[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(7): 31-37. doi: DOI:10.13205/j.hjgc.202207005
shu

FEASIBILITY OF SOILIFICATION OF PHOSPHOGYPSUM DEALKALIZED RED MUD BY APPLYING FULVIC ACID

doi: DOI:10.13205/j.hjgc.202207005

  • Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China

  • Received Date: 2021-06-25
    Available Online: 2022-09-02
    Abstract
  • Fulvic acid is rich in nutrients.It is a plant regulator and can promote plant growth.In order to study the feasibility of soilification of phosphogypsum dealkalized red mud by applying fulvic acid,through the phosphogypsum dealkalized red mud test and the phosphogypsum-fulvic acid combined dealkalized red mud test,the physical and chemical properties of the dealkalized solution and the dealkalized residue were measured,and the pot experiment was carried out to verify its feasibility.The research results showed that:1) phosphogypsum dealkalization reduced the pH value of red mud from 11.08 to about 9.00,and the combined use of phosphogypsum and fulvic acid reduced the pH of red mud to about 8.50;2) the analysis results showed that the addition of fulvic acid promoted the formation of large-diameter agglomerates of red mud and increased the content of large-diameter aggregates and enhanced the stability of the aggregates;3) element analysis results of the dealkalized residue and dealkalized solution showed that the addition of fulvic acid increased the residual sodium ion content and sodium ions content on the red mud;4) pot experiment results showed that higher concentrations of heavy metal ions and sodium ions delayed the germination time of seeds by 4 days and reduced the germination rate of seeds by 8%.With effective dealkalizaton and stabilization of heavy metals in the red mud,the addition of fulvic acid would be beneficial to soil transformation of phosphogypsum dealkalized red mud.
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