title: Toxic assessment of the leachates of paddy soils and river sediments from e-waste dismantling sites to microalga, Pseudokirchneriella subcapitata.
abstract: The potential adverse effects of e-waste recycling activity on environment are getting increasing concern. In this work, a model alga, Pseudokirchneriella subcapitata, was employed to assess the toxic effects of the leachates of paddy soils and river sediments collected from e-waste dismantling sites. Chemical analysis of the paddy soils and river sediments and their leachates were carried out and the growth rate, chlorophyll a fluorescence and anti-oxidative systems of the alga were measured. Results showed that two leachates decreased the amount of PSII active reaction centers and affected photosynthesis performance, interfered with chlorophyll synthesis and inhibited algal growth. Some chemical pollutants in the sediments and soils such as polybrominated diphenyl ethers (PBDEs) and metals derived from e-waste recycling activity may impose oxidative stress on algae and affect the activity of anti-oxidative enzymes such as GST, SOD, CAT and APX. The leachates of both river sediments and paddy soils are potentially toxic to the primary producers, P. subcapitata and the leachate from sediments was more deleterious than that from soils.
authors.affiliation: Department of Ecology/Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China. Electronic address: txpnie@jnu.edu.cn.
authors.forename: Xiangping
authors.initials: X
authors.lastname: Nie
authors.affiliation: Department of Ecology/Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China.
authors.forename: Canpeng
authors.initials: C
authors.lastname: Fan
authors.affiliation: Department of Ecology/Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Ecology/Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China.
authors.forename: Tian
authors.initials: T
authors.lastname: Su
authors.affiliation: Department of Soil and Environment, South China Agricultural University, Guangzhou 510642, China.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. Electronic address: antc99@gig.ac.cn.
authors.forename: Taicheng
authors.initials: T
authors.lastname: An
mesh_terms: D002681:China; D002734:Chlorophyll / Q000032:analysis / Q000378:metabolism; D000077194:Chlorophyll A; D000460:Chlorophyta / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D055615:Electrical Equipment and Supplies; D004781:Environmental Exposure / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000737:chemistry; D006801:Humans; D045483:Rivers / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000633:toxicity*; D064091:Waste Disposal Facilities; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D002734:Chlorophyll; D000077194:Chlorophyll A
keywords: Anti-oxidative system; Chlorophyll a fluorescence; Leachates; Pseudokirchneriella subcapitata; Toxicity assessment; e-Waste dismantling activity