Water, Год журнала: 2023, Номер 15(4), С. 802 - 802

Опубликована: Фев. 18, 2023

This study collected 31 water samples from the Tongzi River, Guizhou Province, Southwest China to conduct a risk assessment understand hydrochemical characteristics and major ion sources of irrigation drinking quality their effects on human health. The results showed that abundance in River is Ca2+ (66%) > Mg2+ (24%) K++Na+ (10%) for cations HCO3− (75%) SO42−(21%) Cl− (4%) anions. Additionally, type Ca-Mg-HCO3, controlled by carbonate weathering. Methods including ratios, principal component analysis (PCA), correlation (CA) were used analyze source main ions river water. PC1, with most significant variance (54.9%), decides affected positive loadings SO42− (0.92), pH (0.85), (0.80), (0.72), Na+(0.66), NO3− (0.65), K+ (0.57). PC2 explains 19.2% total variance, strong Na+ (0.75), (0.63) (0.59). (0.84) (0.85) exhibits high PC3, explaining 9.3% variance. intensive agricultural activities basin nitrate NO3−, whereas was mainly derived mining activities. lower concentrations Na+, K+, coal combustion, domestic wastewater discharge, fertilizer applications. area rock weathering; natural processes (mainly weathering rocks) still origin Ca2+, Mg2+, HCO3−. Moreover, United States Salinity Laboratory (USSL) diagram Wilcox 100% fell C2S1 zones, had good suitability irrigation. health (HRA) HQNO3− much larger than HQNH4+ indicated pollution dominated non-health hazards. About 6.5% tributaries represented an unacceptable infants children, HQ value children always higher adults. non-carcinogenic riverine very noteworthy, especially tributaries.

Язык: Английский