. 2025 Apr 25;10(17):17626–17641. doi: 10.1021/acsomega.4c11495

Table 1. pH Values and Types of Mine Water Anions and Cations in Major Mining Areas in Northwest China.

name of coal mine	location	anions	cations	pH
Liuhuanggou Coal Mine²²	Changji, Xinjiang	HCO₃^–, SO₄^2–, Cl^–	K⁺, Na⁺	7.80
Wudong Coal Mine²³	Urumqi, Xinjiang	SO₄^2–, Cl^–, HCO₃^–	Na⁺, Ca²⁺	7.80
Yili Coal Mine²⁴	Ili, Xinjiang	SO₄^2–, HCO₃^–, Cl^–	Na⁺, K⁺, Ca²⁺, Mg²⁺	7.82
Hongdunzi Coal Mine²⁵	Yinchuan, Ningxia	SO₄^2–, Cl^–, HCO₃^–, F^–	Na⁺, Ca²⁺, Mg²⁺	7.88
Tangjiahui Coal Mine²⁶	Ordos, Inner Mongolia	Cl^–, HCO₃^–, SO₄^2–	Na⁺, Ca²⁺	7.55
Selian Coal Mine²⁷	Ordos, Inner Mongolia	HCO₃^–, SO₄^2–, Cl^–	Ca²⁺, Na⁺, Mg²⁺	8.11
Ningtiaota Coal Mine²⁸	Yulin, Shaanxi	Cl^–, SO₄^2–, HCO₃^–	K⁺, Na⁺, Ca²⁺	7.62
Mengcun Coal Mine²⁹	Xianyang, Shaanxi	SO₄^2–, Cl^–, F^–	Ca²⁺, Mg²⁺	7.50
Chenjiashan Coal Mine³⁰	Tongchuan, Shaanxi	SO₄^2–, HCO₃^–	K⁺, Na⁺, Ca²⁺	8.02