Distribution of groundwater arsenic in Xinjiang, P.R. China

Global threat of arsenic in groundwater

“…The fact that arsenic is generally not included in the standard suite of tested water quality parameters (11) and is not detected by the human senses mean that arsenic is regularly being discovered in new areas. Since one of the greatest occurrences of geogenic groundwater arsenic was discovered in 1993 in the Bengal Delta (5,12,13), high arsenic concentrations have been detected all around the world, with hotspots including Argentina(14-17), Cambodia (18,19), China (20)(21)(22), India (23)(24)(25), Mexico (26,27), Pakistan (28,29), the USA (30,31) and Vietnam (32,33).…”

Factors influencing the distribution of arsenic, fluorine and iodine in shallow groundwater in the oasis zone in the southern margin of the Tarim Basin in Xinjiang, P. R. China

“…The pH value had a positive correlation with groundwater As, F and I concentrations ( Fig.2 a, b and c).With the increase of pH value, adsorption of groundwater arsenate and arsenite on positively charged colloids and clay minerals reduced, which lead to the increase of groundwater As. Previous studies showed that As concentration in shallow groundwater in the Tarim Basin is related to reductive dissolution of Fe(III) oxides [6]. High TDS (ranged between 199 and 358694 mg/L, with an average of 11532 mg/L) and pH values in groundwater in the study area lead to the reduce of Ca 2+ ion activity, which inhibit the formation of CaF2 and promote the enrichment of groundwater [10].…”

“…Endemic arsenicosis, fluorosis and iodism seriously threaten human health [5].In China, the limits for As, F and I in drinking water are 10 µg/L, 1.0 mg/L and 0.08 mg/L, respectively [4]. The enrichment of groundwater As, F and I in parts of Xinjiang Uygur Autonomous Region (hereinafter referred to as "Xinjiang") is a threat to the health of local residents [6][7][8]. However, there is no research on the coexistence of groundwater As, F and I in the southern margin of the Tarim Basin.…”

Mn-Fe Layered Double Hydroxide Intercalated with Ethylene-Diaminetetraacetate Anion: Synthesis and Removal of As(III) from Aqueous Solution around pH 2–11

“…Arsenic pollution incidents of varying degrees have occurred in Guangxi, Henan, Gansu, Xinjiang, and Shandong provinces in China. Nearly 20 million people have been exposed to arsenic pollution, and nearly 580,000 square kilometers have been polluted by arsenic in the country [ 5 ]. Chile, Mexico, Argentina, Poland, Canada, Hungary, Japan, and other countries have also reported incidents of excessive arsenic concentration.…”