“…[2][3][4] Studies have shown that Cr(VI) can cause various problems to the human body, such as kidney and liver damage, gastrointestinal irritation and skin allergy. [5][6][7] The World Health Organization's International Agency for Research on Cancer (IARC) has classied Cr(VI) as a group 1 carcinogen. 8 Furthermore, the World Health Organization (WHO) also species the maximum acceptable levels of Cr(VI) in drinking water and industrial wastewater, which are 50 mg L −1 and 250 mg L −1 , respectively.…”