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131.
Tiancui Li Yaocheng Fan Deshou Cun Yanran Dai Wei Liang 《Frontiers of Environmental Science & Engineering》2020,14(2):26
132.
Zhenyu Yang Rong Xing Wenjun Zhou Lizhong Zhu 《Frontiers of Environmental Science & Engineering》2020,14(3):41
133.
Seyyed Salar Meshkat Ebrahim Ghasemy Alimorad Rashidi Omid Tavakoli Mehdi Esrafili 《Frontiers of Environmental Science & Engineering》2021,15(5):109
134.
Kanha Gupta Nitin Khandelwal Gopala Krishna Darbha 《Frontiers of Environmental Science & Engineering》2020,14(1):15
135.
Adsorption and degradation of sulfosulfuron in soils 总被引:3,自引:0,他引:3
Adsorption of sulfosulfuron was studied in two soils (topsoil from Alfisol and Inceptisol). The adsorption of sulfosulfuron
was greater in topsoil collected from Alfisol than in Inceptisol. The soil sorption coefficient K and the soil organic carbon sorption coefficient K
oc are the basic parameters used for describing the environmental fate of the herbicides. In topsoil the calculated K values
from Alfisol was 4.43 and in topsoil from Inceptisol was 2.00. K
c values were 6.06 in topsoil from Alfisol and 3.33 in topsoil from Inceptisol. The K
oc values were 886.36 in topsoil from Alfisol and 770.26 in topsoil from Inceptisol. Field experimental plots with no previous
history of sulfosulfuron were selected and studied the degradation of sulfosulfuron in the topsoil collected from Alfisol
and Inceptisol. The half-life of sulfosulfuron in topsoil from Alfisol: T
1− 3.97 days and T
2− 4.54 days; topsoil from Inceptisol: T
1 − 4.68 days and T
2 − 5.52 days. The degradation of sulfosulfuron followed first-order kinetics. The persistence of sulfosulfuron was found relatively
longer in the Inceptisol than in Alfisol. The combination of degradation data (t
1/2 – soil) and organic carbon based sorption (K
oc) data of herbicides have been used to assess the pesticide environmental impact in soils through Gustafson Ubiquity Score
(GUS). The GUS values were found to be 0.69 in topsoil from Alfisol and 0.83 in Inceptisol. 相似文献
136.
The feasibility of using a chemical reaction-based approach for evaluating and modelling the role of adsorption reactions in determining the geochernical confinement capacity of natural geological barriers is being studied as part of an on-going R & D programme. The confined superficial aquifer underlying the Centre de Stockage de l'Aube facility, a geological barrier for this site, has been used as a case study with the following aims. First, development of a site characterisation protocol and demonstration of its use to determine the principal geochemical characteristics of aquifer materials using batch experiments and to represent the information obtained in terms of a chemical model. The experimental results obtained for Ni2+ partitioning as a function of total Ni, pH, total Ca and total solid can be satisfactorily represented in terms of reactions with an ion exchange site and a single amphoteric surface hydroxyl site with ferrihydrite reaction constants. A second objective is the incorporation of the reactions in a coupled geochemistry/transport code, and to verify the applicability of the coupled code predictions for Ni2+ mass transfer by comparison with the results obtained during column tracer experiments. The breakthrough curve and equilibrium solid phase Ni loading, predicted by a one-dimensional coupled model for a column tracer experiment, agree closely with observed data.Additional studies are underway to reduce model conditionality, to extend the adsorption model to other analogue cations and anions, to incorporate the effect of natural organic matter and to take into consideration precipitation/dissolution of amorphous Fe surface phases. 相似文献
137.
In order to develop small islands, not only must a vital agricultural system be maintained, but the range of opportunities
for tourism must be increased with respect to both the seaside and the environmental features of the rural landscape. As an
alternative to the traditional and economically declining ones, many innovative production processes can be identified, but
their success depends on their interaction with the physical, biological, economic and social environment. In order to identify
the main nodes and the most critical interactions, so as to increase the probability of success of a new productive process,
a methodological approach based on the science of complexity is proposed for the cultivation of capers (Capparis spinosa L.) on the island of Pantelleria. The methodology encompasses the identification of actors and factors involved. the quantitative
evaluation of their interactions with the different stages of the productive process, and a quasiquantitative evaluation of
the probability that the particular action will be performed successfully.
The study of “traditional,” “modernized,” and “modernized-sustainable” processes, shows that the modernized-sustainable process
offers mutually reinforcing opportunities in terms of an integrated development of high-quality agricultural products and
the enhancement of environmental features, in conjunction with high-efficiency production techniques, in conjunction with
high-efficiency production techniques, in a way that suits the development of Pantelleria. There is a high probability of
failure, however, as a result of the large number of critical factors. Nevertheless, the present study indicates which activities
will enhance the probability of successful innovation in the production process. 相似文献
138.
139.
以Hg(NO3)2、Cu(NO3)2水溶液为模拟工业废水,以侧链具N、S配位基的网状聚合物冠醚为吸附剂,研究了聚合物冠醚对HP(2+)、Cu(2+)的吸附性能。讨论了溶液温度、pH值、金属离子浓度及时间对吸附性能的影响,该聚合物冠醚对Hg(2+)具有较高的吸附容量和较快的吸附速度。 相似文献
140.
以国产硅胶担体为固体吸附剂,采集空气中联苯-联苯醚。经热解吸、制冷、闪蒸后,用气相色谱法测定。实验结果,在常温下,国产硅胶对联苯-联苯醚的吸附率达100%;解吸回收率为97.5%:变异系数<5%;方法的检测限为0.4μg。 相似文献