Correlation of Hg-N on ex-gold mining soil ameliorated with Sub-Bituminous coal and activation of Sub-Bituminous coal–NaOH

• Published in: IOP conference series. Earth and environmental science 2023-07, Vol.1208 (1), p.12049
• Main Authors: Maulana, A, Harianti, M, Prasetyo, T B, Herviyanti
• Format: Article
• Language: English
• Subjects: Activation; Bituminous coal; Coal; Coal mining; Contamination; Design of experiments; Ex-gold mining soil; Experimental design; Gold; Gold mines & mining; Mercury; Mercury (metal); NaOH; Nitrogen; Sodium hydroxide; Soil amendment; Soil contamination; Soil pollution; Soils; Sub-Bituminous coal; Technology
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/1208/1/012049

Mercury (Hg) contamination has become a serious threat to ecosystems. Amelioration technology for soil is expected to control the specific interactions between N in ex-gold mining soil contaminated with Hg. This research aimed to analyze the interaction of Hg-N on ex-gold mining soil ameliorated with sub-bituminous coal and the activation of sub-bituminous coal with 10% NaOH. The experimental design used in this study was a Completely Randomized Design with three replications. The treatment I (Sub-bituminous coal) and II [activation of Sub-bituminous coal with 10% NaOH) was implemented in the pot with equivalent doses, respectively: (A) 0 [0g 100g -1 soil], (B) 10 [0.5g 100g -1 soil], (C) 20 [1g 100g -1 soil], (D) 30 [1.5g 100g -1 soil], and (E) 40 t ha -1 [2.0g 100g -1 soil]. The correlation between total Hg with total N l on ex-gold mining soil ameliorated with sub-bituminous coal [r = -0.889** or Hg = -9.9794 (N) + 6.9097; R 2 = 0.9222] and activation of sub-bituminous coal with 10% NaOH [r = -0.835** or Hg = -4.3111 (N) + 6.4265; R 2 = 0.8156]. Amelioration technology on ex-gold mining land with sub-bituminous coal and activation of sub-bituminous coal with 10% NaOH can reduce the total Hg by 2.50 and 2.84 mg kg -1 and also increase the total N by 0.23 % and 0.53% respectively, compared to control.