Vol 32, No 3 (2024)

Empirical calculation functions of global warming are presented, as well as the results of the sea level rising calculation for three scenarios of the world energy sector decarbonization. The functions of the sea level rising are given, separately considering the impact of continental ice melting and the impact of water thermal expansion. It is concluded that the goals of the Paris Agreement to keep global warming within +2°C are unattainable. Even under the intensive decarbonization scenario, the world will follow a trajectory of global temperature rise by 5°C over the next 100 years.

The most serious negative factor for life, and even more so for human recreation in urban conditions, is urban noise, the level of which has increased significantly recently. The city of Bryansk is also an exception - the administrative center of the Non-Chernozem region of the Russian Federation, in which a large number of parks squares, and forest parks are concentrated. The evaluation of the physical characteristics of the main noise sources forming the noise regime and the averaged sample values of noise on the streets of Bryansk is quite relevant. The study considers the condition of green spaces located near highways of citywide significance, streets of district significance and residential, as well as the ability of green spaces to absorb noise. The permissible sound level at the calculated points was determined and compared with the regulatory criteria. The characteristics of the strips of green spaces with the most effective noise protection are revealed.

Most of the potential sources of radioactive contamination in the Arctic are located in the Barents and Kara Seas. In this regard, scientific research is regularly carried out in these territories, the results of which can be used to determine and analyze radiation and environmental risk. The goal and objective of the work is to calculate integral indicators of radionuclide pollution and generalized indicators of radiation-ecological risks in water and bottom sediments of the Barents and Kara Seas areas exposed to nuclear and radiation hazardous facilities. It is shown that the index ranges from 9.5·10-5 to 4.1·10-4 for water and from 1.2·10-4 to 1.3·10-2 for bottom sediments, which is much less than one. Calculated values of the risk indicator for K-159 range from 3 to 6, which corresponds to an insignificant radiation impact on the marine environment, for bays and the Novaya Zemlya depression from 12 to 18, which is characterized by a weak impact on the radiation situation. Thus, the objects under assessment have an insignificant and weak impact on the radiation situation in the Arctic region, but, taking into account the potential danger, they require constant monitoring of the components of the marine environment in order to timely detect radiation-ecological changes.

The article presents the results of investigation of various modifications based on nonconforming zeolite raw materials rocks of the Holinsky depozit with a low klinoptilolite content (50-55%), which substantiates the feasibility of their involvement in the production of sorbents effective for wastewater treatment from oil products and heavy metal ions. Various methods of modifying zeolites have been studied: with high-silicon compounds (hexamethyldisilazalone and tetraethoxysilane), as well as with a sulfur polymer based on by-products of the production of epichlorohydrin. The investigation of microstructures of obtained samples was carried out using scanning electron spectroscopy (SEM), X-ray phase analysis (XPA) using powder X-ray diffractometry. The fixation of modifiers on the zeolite surface has been proven by IR spectroscopy and energy-dispersive X-ray spectroscopy (EDS). The sorption of heavy metal ions such as nickel and zinc on modified zeolites has been proven by IR, EDS, and inductively coupled plasma atomic emission spectrometry (ICP-AES). To prove the sorption of oil products, IR methods were used, as well as differential scanning calorimetry and thermogravimetry. Сlass of hazard (IV) for spent sorbents was established by biotesting using Daphnia magna Straus and Chlorella vulgaris Beijer .

In the present work examines the problem of ecology and the relevance of the formation of a new form of public ecological consciousness. The work uses methods of analysis, synthesis, systematization, generalization. Information is provided on the problem of water pollution in the Khabarovsk Territory. The article describes the activities of the Ministry of Natural Resources of the Khabarovsk Territory on the formation of an environmentally responsible consciousness of the population when involving it in eco-volunteer activities, provides data on other ongoing events and their information support. An overview of the quantitative indicators of the campaign «Water of Russia» for five years in the Khabarovsk Territory is made. According to the authors, the annual increase in the number of eco-volunteers in the Khabarovsk Territory suggests that holding environmental actions effectively affects the formation of environmental awareness of the public. It was noted that the implementation of environmental programs in the field of education, science and business will help to respond to environmental challenges in modern society. The authors believe that systematic and systematic work is needed to form an ecological culture and consciousness of the population. Such work is feasible in educational events, promotional campaigns and PR projects with the support of the Ministry of Natural Resources of the Khabarovsk Territory.