several geological areas from west to east of China. Water quality in northern China changed regularly with season in the past 3 years, as exemplified by the daily water quality reports provided by the plant. The alkalinity was more
SO 4, NO 3?, NO 2?, Cl ?and the pH value, total hardness, total alkalinity increased significantly, in which + NH 4, NO 3?, and NO ?2of groundwater exceeded the drinking water standards as a result of non-point pollution caused by the expansion of cultivated land and mass use of...
Cl and the pH value, total hardness, total alkalinity increased significantly, in which NH 4 + , NO 3 , and NO 2 of groundwater exceeded the drinking water standards as a result of non-point pollution caused by the expansion of cultivated land and mass use of the fertilizer and pesticide...
As forestland and unused land transformed into cultivated land, the total hardness, total alkalinity, pH, and the concentrations of NH 4, SO2-4, NO-3, NO-2, and Cl- in the groundwater increased significantly, but the concentrations of Ca2 and HCO-3 in the groundwater declined obviously....
Table 2. Summary of the water quality parameters of research area. During the study period, the pH of surface water in Shengzhou City ranged from 6.110 to 8.96, with an average level of 7.459, showing a weak alkalinity overall. The DO range was 3.120–15.500 mg/L with an average value...
The sodium absorption ratio (SAR) assesses the potential alkalinity hazard to the soil by comparing the concentrations of sodium, calcium, and magnesium in groundwater. Electrical conductivity (EC) is a crucial parameter in groundwater irrigation quality assessment, reflecting groundwater salinity [58]...
the salt content in water bodies is also very different [47], resulting in salt and alkali being the basic characteristics of the water environment in the Songnen Plain. Where salinities and alkalinities fluctuate, interspecific differences in tolerance of salinity and alkalinity of algae play a...