Abstract: To understand the content of heavy metals in citrus soil and citrus in a lead-zinc mine affected area in northern Guangxi and explore the green development model of the local citrus industry, 131 samples of local citrus soil and 71 citrus fruit samples (58 oranges and 13 kumquats) were collected. The atomic fluorescence spectrometer (AFS-9700), graphite furnace atomic absorption spectrometry (AA 700) and inductively coupled plasma emission spectrometry (Optima 7000) were used to determine the content of the three priority control pollutants:As, Pb and Cd. The pollution index method was used to assess the level of heavy metal pollution. Results show that the arithmetic mean soil pH was 6.07 in the study area, indicating that the soil was weakly acidic. The soil heavy metal As pollution was on the safety level. The content of heavy metals Pb and Cd reached 91.40 and 0.906 mg·kg^-1, respectively, classified as severe pollution levels. The soil comprehensive pollution index was 4.90, which was at a level of heavy pollution. For the citrus fruits grown in the lead-zinc mine affected area, the contents of As, Pb and Cd in oranges were far below the national standard limit. The content of Cd exceeded the standard limits in kumquats, indicating that kumquat had certain health risks. To develop a healthy and green citrus industry, it is suggested that measures such as citrus variety optimization, planting structure optimization and fertilization mode optimization should be taken and plant extraction technology be used to improve the soil quality.

Key words: soil pollution, citrus, heavy metal, lead-zinc mine