The effects of acidification on arsenic concentration and speciation in offshore shallow water system. (August 2022)

• Record Type: Journal Article
• Authors: Zhang, Jinfeng; Du, Jinhui; Zhang, Shengxiao; Yang, ShuangShuang; Xu, Qiang
• Is Part Of: Marine pollution bulletin. Volume 181(2022)
• Publication Date: 2022-08
• Subjects: Ocean acidification -- Arsenic -- Speciation -- Interaction -- Coastal waters; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2022.113930
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: The effects of acidification on speciation and transportation of arsenic in shallow seawater system were investigated based on data from acidification simulation experiments in lab scale tanks, in which enhanced levels of pCO2 corresponding to pHT were processed. The results showed that: (1) the concentration of DIAs (Dissolved inorganic arsenic), As 5+ and As 3+ in the overlying water increased with experimental CO2 enrichment; (2) while the ratio of As 5+ /As 3+ decreased; (3) acidification could cause more DIAs transport into the overlying water from sediments or suspended particulate matters, and would be favorable to the existence of As 3+ . Thus, DIAs is available to microorganisms and can be taken in effectively by microorganisms in the shallow water system, resulting in toxic effects of As on microorganisms and thus the inhibition of the growth of microorganisms. Highlights: Acidification simulation experiments were conducted in lab scale tanks. Effects of acidification on speciation and transportation of arsenic were studied. Acidification could cause more DIAs transport into overlying water from sediments. Acidification would be favorable to the existence of As 3+ in overlying waters.