Nie Xiangping, Fan Canpeng, Wang Zhaohui, Su Tian, Liu Xinyu, An Taicheng
Department of Ecology/Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China.
Department of Ecology/Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China.
Ecotoxicol Environ Saf. 2015 Jan;111:168-76. doi: 10.1016/j.ecoenv.2014.10.012. Epub 2014 Oct 28.
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.
电子垃圾回收活动对环境的潜在不利影响日益受到关注。在这项工作中，使用模式藻类小新月菱形藻来评估从电子垃圾拆解场地采集的稻田土壤和河流沉积物浸出液的毒性效应。对稻田土壤、河流沉积物及其浸出液进行了化学分析，并测定了藻类的生长速率、叶绿素a荧光和抗氧化系统。结果表明，两种浸出液均降低了PSII活性反应中心的数量，影响光合作用性能，干扰叶绿素合成并抑制藻类生长。沉积物和土壤中的一些化学污染物，如多溴二苯醚（PBDEs）和源自电子垃圾回收活动的金属，可能会对藻类施加氧化应激，并影响抗氧化酶如谷胱甘肽S-转移酶（GST）、超氧化物歧化酶（SOD）、过氧化氢酶（CAT）和抗坏血酸过氧化物酶（APX）的活性。河流沉积物和稻田土壤浸出液对初级生产者小新月菱形藻均具有潜在毒性，且沉积物浸出液比土壤浸出液的危害更大。
