Sulfur mediated heavy metal biogeochemical cycles in coastal wetlands: From sediments, rhizosphere to vegetation

• DOI: 10.1007/s11783-022-1523-x
• Publication Date: 2022-03-31T05:02:23Z
• Authors: Yueming Wu; Zhanrui Leng; Jian Li; Chongling Yan; Xinhong Wang; Hui Jia; Lingyun Chen; Sai Zhang; Xiaojun Zheng; Daolin Du
• Keywords: Biogeochemical Cycle; Biogeochemistry

Abstract The interactions and mechanisms between sulfur heavy metals are a growing focus of biogeochemical studies in coastal wetlands. These issues underline the fate bound sediments or released into system through sediments. Despite fact that numerous published have suggested has significant impact on bioavailability accumulated wetlands, to date, no review article systematically summarized those studies, particularly from perspective three major components wetland ecosystems (sediments, rhizosphere, vegetation). present summarizes past four decades highlights achievements this field. Research available thus far indicate under anaerobic conditions, most potentially bioavailable fixed as precipitates, such metal sulfides. However, fluctuations physicochemical conditions may affect cycling, hence, directly indirectly lead conversion migration metals. In root activities microbes together speciation transformation which turn mediate As for plant tissues, tolerance is enhanced by sulfur-containing compounds via promoting series chelation detoxification processes. Finally, further understand some future research directions proposed.