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931.
区域大气降水稳定同位素组成是利用同位素技术研究区域水循环所必须的前提,对于深入了解水循环过程具有重要意义。本研究基于次降水样品,分析了胶莱平原及周边地区降水氢氧稳定同位素特征,探讨了降水同位素的环境效应,并通过对比分析不同水汽输送路径站点的降水同位素季节变化趋势,揭示了胶莱平原大气降水水汽来源。结果显示:胶莱平原大气降水线LMWL为δ2H=6.38δ18O + 0.72,胶莱平原大气降水δ18O存在较显著的温度效应和降水量效应,高程效应不显著。6—9月,胶莱平原降水水汽主要受控于东亚季风,水汽主要来自相邻太平洋海域蒸发水汽;10月—次年5月,胶莱平原降水水汽主要受控于西风,水汽来源于局地蒸发,受极地水汽影响较小。本研究结果将为胶莱平原地表水—地下水—海水之间的相互转化及水循环研究提供基础。 相似文献
932.
Quanli Man Peilian Zhang Weiqi Huang Qing Zhu Xiaoling He Dongsheng Wei 《Frontiers of Environmental Science & Engineering》2022,16(6):69
933.
Guan Lingliang Yang YuXia Jiang Pan Mou Qiuyu Gou Yunsha Zhu Xueyan Xu Y. Wen Wang Rulin 《Environmental science and pollution research international》2022,29(29):44003-44019
Environmental Science and Pollution Research - Blumea balsamifera is a famous Chinese Minority Medicine, which has a long history in Miao, Li, Zhuang, and other minority areas. In recent years, due... 相似文献
934.
Manganese ion (Mn2+) generated from metallurgical, steel making and chemical industries enters sewage treatment plants and affects the sludge activity and flocculation. The effect of Mn2+ on the removal of chemical oxygen demand (COD) and total phosphorus (TP) and sludge activity were investigated in anoxic zone of an anaerobic/anoxic/oxic (A2O) process. The compositions and structures of extracellular polymeric substances (EPS) were characterized using three-dimensional excitation emission matrix fluorescence spectroscopy (3D-EEM), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) to reveal the relationship among Mn2+, EPS and sludge flocculation.The results showed that low concentration of Mn2+ (<5 mg/L) improved removal efficiencies of COD and TP and increased the activity of alkaline phosphatase, acid phosphatase and dehydrogenase. Meanwhile, the addition of Mn2+ increased total EPS, sludge contact angle, Zeta potential and sludge particle size, and thus enhanced sludge flocculation. However, high concentration of Mn2+ (>10 mg/L) hindered microbial flocculation and reduced removal efficiencies of the pollutants. When Mn2+was 5 mg/L, removal efficiencies of COD and TP reached 65% and 90%, respectively. Sludge flocculation was the best and SVI was 70.56 mL/g. The changes of Mn2+ concentration caused deviation of groups’ compositions in LB-EPS and TB-EPS, where the main components were always protein (PN) and polysaccharide (PS). The addition of Mn2+ resulted in the degradation of humic acids. However, it did not give rise to significant morphology changes of EPS. 相似文献
935.
Xie Yong Zuo Qingsong Guan Qingwu Wei Kexiang Zhang Bin 《Environmental science and pollution research international》2022,29(17):25029-25045
Environmental Science and Pollution Research - Improving the NOx conversion efficiency and particulate combustion efficiency under cold-start conditions (low-temperature conditions) is still the... 相似文献
936.
Huang Yu-Qi Zeng Yuan Wang Tao Chen She-Jun Guan Yu-Feng Mai Bi-Xian 《Environmental science and pollution research international》2022,29(25):37737-37747
Environmental Science and Pollution Research - Plasticizers are ubiquitous pollutants in the environment, whereas few efforts have been made to elucidate their emission sources in the atmosphere.... 相似文献
937.
Liu Anchen Lin Wenting Ping Senwen Guan Wenqi Hu Ningyi Zheng Sichun Ren Yuan 《Environmental science and pollution research international》2022,29(29):43984-44002
Environmental Science and Pollution Research - Antihistamines (ANTs) are medicines to treat allergic diseases. They have been frequently detected in the natural water environment, posing potential... 相似文献
938.
Basit Farwa Liu Jiaxin An Jianyu Chen Min He Can Zhu Xiaobo Li Zhan Hu Jin Guan Yajing 《Environmental science and pollution research international》2022,29(7):10183-10197
Environmental Science and Pollution Research - Brassinosteroids (BRs) are growth-promoting hormones that exhibit high biological activities across various plant species. BRs shield plants against... 相似文献