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Radon mass exhalation rate of soil samples was measured using an exhalation chamber of 10 dm(3) volume and a Lucas cell. The results show that mass of sample, grain size and water content influence the radon mass exhalation rate. For soil of (226)Ra activity concentration about 2500 Bq kg(-1) and samples within the range from 0.20 kg to 0.50 kg, the radon mass exhalation rate values are higher than those for samples of other masses. The observed radon exhalation rate is an inverse function of the average grain size. At the water content about 6% by weight, the radon mass exhalation rate reaches maximum, then it decreases with both increasing and decreasing of the water content in the sample. 相似文献
13.
Relationship between water solubility of chlorobenzenes and their effects on a freshwater green alga
The effective concentrations of benzene and 12 chlorobenzenes that reduced 50% of the primary productivity (EC50) of a freshwater green alga, , were determined. Benzene was the least toxic chemical and the toxicity increased as the degree of chlorine substitution in the aromatic ring increased. No EC50 value could be obtained for HCB. A quantitative relationship was found to exist between water solubility, lipophilicity and the EC50. A good correlation was also observed between the EC50 for this alga and other toxicity data for various aquatic biota. 相似文献
14.
A mixture of ten metals (As, Cd, Cr, Cu, Fe, Pb, Hg, Ni, Se and Zn) at the Great Lakes Water Quality Objective levels was found to reduce the primary productivity of four cultured freshwater algae (, , and ) as well as natural phytoplankton from Lake Ontario water. The metal mixture also caused a reduction in the reproduction and transport of an amino acid analogue (α-aminoisobutyric acid) by . The depuration and exchange of the amino acid analogue were not affected by the metal mixture. The nitrogenase activity of was, however, reduced in the presence of the metal mixture. 相似文献
15.
Veeriah Jegatheesan Nevelina Pachova Perlie Velasco Mohamed Ismail Mohammed Mowjood Sujithra Kaushaliya Weragoda Madhubhashini Makehelwala Ngo Thuy Diem Trang Bao-Trong Dang Cong-Sac Tran Thi-Kim-Quyen Vo Nguyen Thi Thu Trang Huy Pham Ma. Catriona Devanadera Antonina Torrens Xuan-Thanh Bui Phuoc-Dan Nguyen Amy Lecciones Kristhombu Baduge Shameen Nishantha Jinadasa 《环境质量管理》2023,32(3):335-365
Water quality is a critical challenge in Asia in the context of growing industrialization, urbanization, and climate change. Nature-based solutions (NbS) could play an important role in reducing urban water pollution, while generating multiple co-benefits that could make cities more liveable and resilient. In this regard, a number of pilot and demonstration projects have been set up to explore their potential across cities in Asia. Their effectiveness and impacts, however, have not been adequately documented, thus how they can be sustained, replicated and up-scaled remain poorly understood. This study aims to contribute to addressing this challenge by co-developing an integrated assessment framework and employing it to understand how existing evaluations of NbS in the region can be improved. It focuses specifically on a set of nature-based solutions that have been employed for water treatment across six cities in Southeast Asia (two in each Sri Lanka, the Philippines, and Vietnam), namely, floating wetlands, constructed wetlands and maturation ponds. The study also suggests specific methodologies for capturing a set of core indicators considered relevant for assessing the effectiveness and capturing the multi-faceted impacts of the examined NbS. 相似文献
16.
Environmental Management System (EMS) has been one of the important tools for sustainable construction for around two decades. However, many issues concerning sustainable development have not been properly addressed, and there is a need for the introduction of green specifications to advance green performance in construction through contract management. This paper defines green specifications, identifies the reasons for adopting green specifications and highlights the environmental issues that may not be addressed by solely adopting EMS. It also presents the results of a recent survey of practitioners concerning their opinions towards green specifications and possible impacts arising from their adoption. From the results of the survey, a framework for developing green specifications is deemed valuable for the cities striving for sustainability. Interestingly, the level of acceptable changes brought about by green specifications as perceived by different industry stakeholders is found to be unrelated to whether they were from organizations implementing EMS or not. 相似文献
17.
Nguyen Quoc Hung Tran Anh T. K. Hoang Nhung T. T. Tran Yen T. H. Nguyen Phu X. Pham Thi Thuy Nguyen Manh Khai Van der Bruggen Bart 《Environmental science and pollution research international》2022,29(28):42074-42089
Environmental Science and Pollution Research - Single-use plastic waste is gradually considered a potential material for circular economy. Ion exchange resin obtained from polystyrene waste by... 相似文献
18.
Tham Trinh Thi Hung Trinh Le Thuy Trinh Thi Mai Vu Thi Trinh Le Thi Hai Chu Vu Minh Tu Binh 《Environmental science and pollution research international》2022,29(28):41992-42004
Environmental Science and Pollution Research - The Red River is the largest river in northern Vietnam, and it serves as the main water source for production and human activities in the Red River... 相似文献
19.
Van Thinh Nguyen Chung Nguyen Thuy Luong Ly Thi Mai Chinh Pham Minh Anh Phan Phuong Huy Nguyen The Thuy Dang Thi Thai Phong K. 《Environmental science and pollution research international》2022,29(28):42055-42066
Environmental Science and Pollution Research - Industrial sludges from wastewater treatment plants of industrial parks and a drinking water treatment plant in northern Vietnam were investigated in... 相似文献
20.
Bui Long Ta Nguyen Phong Hoang Nguyen Duyen Chau My 《Environmental science and pollution research international》2022,29(28):41886-41908
Environmental Science and Pollution Research - Vietnam has been one of the nations strongly affected by climate change; hence, finding and promoting solutions in order to adapt and proactively... 相似文献