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Ecological Characteristic of a Highly Eutrophic Pond: The Role of Green Algae in Eutrophication
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130024
T. N. Gerasimova, A. P. Sadchikov
{"title":"Ecological Characteristic of a Highly Eutrophic Pond: The Role of Green Algae in Eutrophication","authors":"T. N. Gerasimova,&nbsp;A. P. Sadchikov","doi":"10.1134/S1070363224130024","DOIUrl":"10.1134/S1070363224130024","url":null,"abstract":"<p>Patriarch’s Pond is a small water body located within the boundaries of Moscow, where regular and mass blooms of green algae are observed. Various fish species exhibit intermittent spawning throughout the summer, and young fish of different sizes are consistently present in the pond, primarily consuming large zooplankton individuals. This predation results in a shift in the size structure of the zooplankton population toward smaller species. A total of twenty-three zooplankton species have been recorded in the pond, with rotifers being the most abundant. Phytoplankton analysis revealed the presence of 106 species of algae and cyanobacteria, with green algae comprising 67 species.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3462 - 3466"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Morphology and Sorption Characteristics of Surface-Modified Granular Foam Silicate
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130176
A. V. Perfilev, O. N. Tsybulskaya, T. V. Ksenik, A. A. Yudakov, E. B. Merkulov, D. Kh. Shlyk, N. N. Barinov, M. A. Ushkova, M. V. Pavlov
{"title":"Morphology and Sorption Characteristics of Surface-Modified Granular Foam Silicate","authors":"A. V. Perfilev,&nbsp;O. N. Tsybulskaya,&nbsp;T. V. Ksenik,&nbsp;A. A. Yudakov,&nbsp;E. B. Merkulov,&nbsp;D. Kh. Shlyk,&nbsp;N. N. Barinov,&nbsp;M. A. Ushkova,&nbsp;M. V. Pavlov","doi":"10.1134/S1070363224130176","DOIUrl":"10.1134/S1070363224130176","url":null,"abstract":"<p>The paper presents the results of a study of the porous structure and sorption characteristics of technogenic foam silicate obtained in the process of complex processing of waste ore raw materials and modified in the process of thermochemical treatment in the gas phase of hydrocarbons. The parameters of thermochemical modification of the surface of foam silicate to obtain an oleophilic adsorbent for the removing of petroleum products from aqueous media, as well as the modes of its regeneration, have been determined. It has been established that the degree of extraction of petroleum products from water by the resulting adsorbent under static conditions is 99.8%.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3566 - 3575"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Toxicity of Ricin in Humans Following Oral Administration
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130073
G. T. Frumin
{"title":"Toxicity of Ricin in Humans Following Oral Administration","authors":"G. T. Frumin","doi":"10.1134/S1070363224130073","DOIUrl":"10.1134/S1070363224130073","url":null,"abstract":"<p>The relevance of this study stems from the need to quantify the toxicity of ricin when ingested orally. The aim of the research was to estimate the average lethal doses of ricin for humans via oral administration, using rats as a model organism for the prediction. Formulas for predicting the average lethal doses of ricin in humans are presented. The following methods were employed for this prediction: Yu.R. Rybolovlev and R.S. Rybolovlev’s methods, the American Environmental Protection Agency’s approach, the methods of D.B. Laurence and A.L. Bacharach, and the method developed by the author of this study. The predicted values for the average lethal doses of ricin in humans, along with their average value and confidence interval, are provided.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3496 - 3499"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Forest Reclamation and Reforestation Strategies in the Far Eastern Federal District
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130358
L. T. Krupskaya, M. Y. Filatova, I. V. Shugalei, A. P. Vozniakovsky, A. V. Leonenko, S. V. Nifontov
{"title":"Forest Reclamation and Reforestation Strategies in the Far Eastern Federal District","authors":"L. T. Krupskaya,&nbsp;M. Y. Filatova,&nbsp;I. V. Shugalei,&nbsp;A. P. Vozniakovsky,&nbsp;A. V. Leonenko,&nbsp;S. V. Nifontov","doi":"10.1134/S1070363224130358","DOIUrl":"10.1134/S1070363224130358","url":null,"abstract":"<p>This article addresses the major environmental challenges affecting forest landscapes in the Far Eastern Federal District, highlighting the need for forest reclamation on lands degraded by resource extraction and the development of plantation forests. It also outlines potential strategies for improving environmental conditions in the region. The study aims to demonstrate the necessity of rehabilitating forest lands impacted by accumulated waste from mineral processing, a result of past mining activities. This objective is pursued through forest reclamation using bioremediation techniques and the establishment of forest plantations to ensure environmental safety.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3490 - 3495"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
PAHs and Heavy Metals in Contaminated Waters of Oil Refinery and the Caspian Sea
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130243
E. M. Gadirova, S. R. Hajiyeva, A. G. Huseyinli, U. N. Rustamova
{"title":"PAHs and Heavy Metals in Contaminated Waters of Oil Refinery and the Caspian Sea","authors":"E. M. Gadirova,&nbsp;S. R. Hajiyeva,&nbsp;A. G. Huseyinli,&nbsp;U. N. Rustamova","doi":"10.1134/S1070363224130243","DOIUrl":"10.1134/S1070363224130243","url":null,"abstract":"<p>Polycyclic aromatic hydrocarbons (PAHs) are among the most common pollutants entering surface waters with wastewater from oil refining, shale processing, forest chemical, coke, aniline dye industries, in the process of timber rafting, as well as with wastewater from the hydrolysis industry. During the process of oil refining, catalytic and thermal cracking, wastewater containing PAHs is formed, which are very dangerous for the environment.To analyze such waters, we took 3 samples from points of the Oil Refinery (OR) and studied the content of PAHs in the wastewater using analytical methods.The content of heavy metals was also determined in these samples.In addition, the content of PAHs in seawater samples taken from the Caspian Sea was determined in parallel.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3627 - 3638"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anthropogenic Pollution and Changes in Heavy Metals and Biogenic Compounds Levels in the Kurkuzhin River (2021–2022): a Tributary of the Central Caucasus
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130012
L. Z. Zhinzhakova, E. A. Cherednik
{"title":"Anthropogenic Pollution and Changes in Heavy Metals and Biogenic Compounds Levels in the Kurkuzhin River (2021–2022): a Tributary of the Central Caucasus","authors":"L. Z. Zhinzhakova,&nbsp;E. A. Cherednik","doi":"10.1134/S1070363224130012","DOIUrl":"10.1134/S1070363224130012","url":null,"abstract":"<p>An assessment of pollution in the small, non-glacial Kurkuzhin River, a right tributary of the glacial Malka River, was conducted by comparing data collected over a two-year observation period with standard maximum permissible concentration (MPC) values. Water quality was characterized according to established land surface water classifications. The analysis included elemental composition data for trace pollutants—Cr, Ni, Mo, Mn, Zn, and Pb—along with biogenic compounds such as NO<sub>2</sub><sup>‒</sup> , NO<sub>3</sub><sup>‒</sup> , and NH<sub>4</sub><sup>+</sup>. The study covered both the foothill and lowland zones of the Kurkuzhin, highlighting distinctive features of spatio-temporal pollution patterns and providing an environmental assessment of water pollution by year. The non-glacial waters of the Kurkuzhin River were classified as “consistently polluted” during 2021–2022.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3457 - 3461"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Seasonal and Anthropogenic Factors on Changes in Concentrations of Heavy Metals in Urban Water Systems
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130218
V. A. Kudryavtseva, T. A. Popova, T. D. Shigaeva
{"title":"Influence of Seasonal and Anthropogenic Factors on Changes in Concentrations of Heavy Metals in Urban Water Systems","authors":"V. A. Kudryavtseva,&nbsp;T. A. Popova,&nbsp;T. D. Shigaeva","doi":"10.1134/S1070363224130218","DOIUrl":"10.1134/S1070363224130218","url":null,"abstract":"<p>The concentrations of zinc (Zn), cadmium (Cd), lead (Pb) and copper (Cu) compounds in bottom sediments and surface waters of the Chernaya River in St. Petersburg in the spring-summer and autumn periods were determined. Analysis of water quality at the river source (sampling point S1) revealed a persistent anthropogenic impact on the water system associated with heavy metal pollution throughout the entire observation period. The ecological situation in bottom sediments was assessed. The most polluted areas were found near the source of the river, at point S1. According to the geo-accumulation index (<i>I</i><sub>geo</sub>), contamination with cadmium and copper is assessed as moderate, while for mercury (Hg) this indicator ranges from moderate (spring) to severe (summer). In areas with high anthropogenic impact, the proportion of mobile forms of metals in bottom sediments increases.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3602 - 3610"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Eutrophication of Water Bodies and Control of This Process with the Use of Zooplankton and Planktophage Fish
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130371
T. N. Gerasimova, A. P. Sadchikov
{"title":"Eutrophication of Water Bodies and Control of This Process with the Use of Zooplankton and Planktophage Fish","authors":"T. N. Gerasimova,&nbsp;A. P. Sadchikov","doi":"10.1134/S1070363224130371","DOIUrl":"10.1134/S1070363224130371","url":null,"abstract":"<p>The study was carried out in a number of small water bodies within the boundaries of Moscow. In these water bodies, regular and mass blooming of cyanobacteria and green algae was recorded. Due to the long-term repeated spawning during the summer, juvenile fish of various sizes were constantly present in the pond. They mostly consume large-size zooplankton. Because of this, the dimensional structure of the population shifts towards smaller species. <i>Simocephalus vetulus</i> was recorded in the water body only once (July, 24). Its number was as small as 0.1 spec/L. After that, up to the end of the study, it was not observed in the pond, although it developed very well in an experimental ecosystem (into which it had entered from the water body). In an isolated flow-through ecosystem (in the absence of fish), the number of <i>S. vetulus</i> in August reached about 9 thousand spec/L. It was not observed in the pond because of its grazing by fish.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3596 - 3601"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of Interactions between Extreme Concentrations of Organic Solvents and Freshwater Plants: Toxicity and Tolerance
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130309
V. A. Poklonov, S. A. Ostroumov, E. V. Anikina, V. V. Erofeeva
{"title":"Study of Interactions between Extreme Concentrations of Organic Solvents and Freshwater Plants: Toxicity and Tolerance","authors":"V. A. Poklonov,&nbsp;S. A. Ostroumov,&nbsp;E. V. Anikina,&nbsp;V. V. Erofeeva","doi":"10.1134/S1070363224130309","DOIUrl":"10.1134/S1070363224130309","url":null,"abstract":"<p>In this article, the effects of high concentrations of four types of organic solvents (benzene, toluene, chloroform, pyridine) on three types of aquatic plants (<i>Ceratophyllum demersum</i> L., <i>Elodea</i>​<i> canadensis</i> Mchk.,<i> Chara fragilis</i> D.) were studied. The experiments were conducted in laboratory (freshwater) microcosms. The tested pollutant concentrations reached 5000 times the Maximum Allowable Concentration (MACs). The incubation temperature was maintained at 24±1.5°C, with observations spanning 7 days (168 h). Macrophyte <i>C. fragilis</i> could not remain viable (death within 24 h). Macrophytes<i> C. demersum</i> and <i>E. canadensis</i> showed a relatively high level of resistance to water pollution by pyridine and chloroform. Therefore, these species may serve as potential candidates for phytoremediation of aquatic environments contaminated with these substances.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3661 - 3671"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anthropogenic and Natural Biogenic Pollution in the Urvan River: А Three-Year Study
IF 0.9 4区 化学
Russian Journal of General Chemistry Pub Date : 2025-02-07 DOI: 10.1134/S1070363224130036
L. Z. Zhinzhakova, E. A. Cherednik
{"title":"Anthropogenic and Natural Biogenic Pollution in the Urvan River: А Three-Year Study","authors":"L. Z. Zhinzhakova,&nbsp;E. A. Cherednik","doi":"10.1134/S1070363224130036","DOIUrl":"10.1134/S1070363224130036","url":null,"abstract":"<p>This study assesses the pollution of the Urvan River, a 52-kilometer-long non-glacial tributary of the Cherek River, one of the main watercourses in Kabardino-Balkaria. Results from three years of observations were compared to established standard concentration values, and the water quality in the middle and lower reaches of the river was determined. The concentrations of pollutants in the Urvan River were analyzed, with particular attention to biogenic compounds such as NO<sub>2</sub><sup>‒</sup>, NO<sub>3</sub><sup>‒</sup>, and NH<sub>4</sub><sup>+</sup>, using chemical analysis methods conducted in an accredited laboratory according to established guidelines. An interannual comparative analysis of pollutant levels from 2021 to 2023 identified the year with the highest levels of biogenic compounds, which significantly impacted the river’s ecological condition. A classification system for environmental quality classes of surface water was employed to assess year-round pollution by year and season. The findings show that the Urvan River remains consistently polluted throughout all phases of the hydrological cycle. The study also highlights distinctive features of the river’s ecosystem and variations in pollution levels during the research period.</p>","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"94 13","pages":"3467 - 3471"},"PeriodicalIF":0.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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