scholarly journals Adsorption and migration of heavy metals between sediments and overlying water in the Xinhe River in central China

2021 ◽  
Author(s):  
Yanqi Zhao ◽  
Ying Yang ◽  
Rongkun Dai ◽  
Sobkowiak Leszek ◽  
Xinyi Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Anthropogenic Activities ◽  
Great Influence ◽  
Central China ◽  
Overlying Water ◽  
Riverbed Sediments ◽  
Static Water ◽  
Bottom Mud ◽  
And Migration ◽  
The Impact

Abstract Long-term polluted rivers often lead to the accumulation of heavy metals in sediments. Anthropogenic activities or biological disturbances break the adsorption balance, causing them to return from the bottom mud to the overlying water and change the aquatic environment. In order to understand the variation of heavy metals between sediments and river water, we collected the riverbed sediments in the polluted Xinhe River and carried out static continuous infiltration and dynamic uninterrupted disturbance experiments. The leaching experiment shows that the absorbability of Cd and Pb is stronger than Cr in the sediment; at the same time, the properties of the medium have a great influence on the adsorption of heavy metals. The disturbance can prompt heavy metals in the sediment to resuspend into the overlying water. The impact is the greatest during the first 12 h, and the influence degree is stronger in the relatively static water than in the moving river. In addition, pH and other factors have different degrees of influence on the desorption of heavy metals.

scholarly journals Heavy Metals in Suburban Ecosystems of Industrial Centres and Ways of their Reduction

2016 ◽  
Vol 35 (3) ◽  
pp. 205-212
Author(s):  
Nikolay Vladimirovich Onistratenko ◽  
Elena Anatolievna Ivantsova ◽  
Andrey Alexandrovich Denysov ◽  
Denys Anatolyevich Solodovnikov
Keyword(s):  
Heavy Metals ◽  
Anthropogenic Impacts ◽  
Animal Husbandry ◽  
Cost Effective ◽  
Industrial Enterprises ◽  
Sources Of Pollution ◽  
Environmentally Safe ◽  
Safe Food ◽  
And Migration ◽  
The Impact

AbstractTechnogenic contamination of ecosystems is one of the main dangers of our time. In order to reduce the harmful effects of this contamination and to provide cost-effective and environmentally safe food production methods, we are forced to look for ways of reliable analysis of the environmental situation, the selection systems of animal husbandry and regulations for the degree of impact of pollutants on the elements of the agroecosystem. This article presents the results of studies aimed at assessing the plight of the environment of a large industrial centre, and its anthropogenic impacts on every element of the suburban ecosystems. It presents data on maintenance and migration of anthropogenous pollutants in the trophic chains of pasturable ecosystems of the suburb of Volgograd. The authors have listed the industrial enterprises as the key sources of pollution. The features of the distribution of xenobiotics in the tissues and organs of calves and heifers of different breeds were analysed in the study. Conclusions were drawn on the accumulation of heavy metals and arsenic in cattle, and the impact of this factor on the quality of production. A comparative assessment of the resistance of different breeds of cows to the action of toxicants in the environment of the Lower Volga region was carried out. Ways to decrease the impact of pollutants on the cattle organism have also been suggested. The article pays attention to the environmental pollution of the industrial centre, the influence of these processes on all elements of an ecosystem including humans, and offers ways to minimize the damage.

scholarly journals Hazardous Heavy Metals Accumulation and Health Risk Assessment of Different Vegetable Species in Contaminated Soils from a Typical Mining City, Central China

2021 ◽  
Vol 18 (5) ◽  
pp. 2617
Author(s):  
Zhen Wang ◽  
Jianguo Bao ◽  
Tong Wang ◽  
Haseeb Tufail Moryani ◽  
Wei Kang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soils ◽  
Anthropogenic Activities ◽  
Risk Index ◽  
Hazard Index ◽  
Pollution Index ◽  
Potential Ecological Risk ◽  
Central China ◽  
Crop Species

Heavy metal poisoning has caused serious and widespread human tragedies via the food chain. To alleviate heavy metal pollution, particular attention should be paid to low accumulating vegetables and crops. In this study, the concentrations of five hazardous heavy metals (HMs), including copper (Cu), chromium (Cr), lead (Pb), cadmium (Cd), and arsenic (As) were determined from soils, vegetables, and crops near four typical mining and smelting zones. Nemerow’s synthetical pollution index (Pn), Potential ecological risk index (RI), and Geo-accumulation index (Igeo) were used to characterize the pollution degrees. The results showed that soils near mining and metal smelting zones were heavily polluted by Cu, Cd, As, and Pb. The total excessive rate followed a decreasing order of Cd (80.00%) > Cu (61.11%) > As (45.56%) > Pb (32.22%) > Cr (0.00%). Moreover, sources identification indicated that Cu, Pb, Cd, and As may originate from anthropogenic activities, while Cr may originate from parent materials. The exceeding rates of Cu, Cr, Pb, Cd, and As were 6.7%, 6.7%, 66.7%, 80.0%, and 26.7% among the vegetable and crop species, respectively. Particularly, vegetables like tomatoes, bell peppers, white radishes, and asparagus, revealed low accumulation characteristics. In addition, the hazard index (HI) for vegetables and crops of four zones was greater than 1, revealing a higher risk to the health of local children near the mine and smelter. However, the solanaceous fruit has a low-risk index (HI), indicating that it is a potentially safe vegetable type.

scholarly journals Heavy Metals in Water, Soils and Sediments of La Villa River Basin- Panama

2021 ◽  
pp. 1-12
Author(s):  
José Villarreal Núñez ◽  
Adolfo Santo Pineda ◽  
Jhon Villalaz Pérez ◽  
Iván Ramos Zachrisson
Keyword(s):  
Heavy Metals ◽  
River Basin ◽  
Water Samples ◽  
Rainy Season ◽  
Anthropogenic Activities ◽  
Great Influence ◽  
Dry Season ◽  
High Concentration ◽  
South Central ◽  
Rectangular Area

Determine the concentration of heavy metals in water, sediments, and crops within the La Villa river basin, Herrera and Los Santos provinces, republic of Panama. La Villa river Basin, south central of Panama, in the rainy season of 2016 (May to November) and in the dry season of 2017 (December to April). Twenty two sediments and water samples were taken using the systematic method which consists of selecting sampling points at uniform distances and crops in upper, middle and lower basin. The selected sampling was confined to a preferably rectangular area of 10.0 m x 30.0 m, on which the sub-samples were taken with a number of 15 on each grid, at 0.20m depth. For collecting the water samples, a rod with a clean plastic bottle was introduced against the current of the river. The digestion of sediments and crops to determine the concentration of heavy metals (As, Pb, Cr, Ni, Cu, Mn, Zn and Cd) was carried out according to USEPA (25) method (3051A) (SW-846). In the sediments, in the rainy season, Cu (upper and lower basin) and Mn (all levels) values were found above the USEPA Standards. In the dry season, high values of Mn were found in the middle and lower basin, Cr in the upper and lower basin and As in all areas of the basin. In the rainy and dry seasons, high levels of Mn, Zn, Cr, Cd and Pb were found in the waters of the rivers that make up the basin. The main crops at each height of the basin were analyzed, determining high levels of As and Cr in the upper basin, in the middle and lower basin Cr and Cd. It is necessary to monitor the concentration of heavy metals in sediments of La Villa river basin because 90% of the agrochemicals that enter the country is destined for agriculture. Each Panamanian consumes (does not ingest) 3 kg of agrochemicals annually, exceeding six times the amount used in Central America.  Due to their geological origin, these soils are rich in copper, manganese and arsenic, latter being associated with iron oxides and sulfides but there is also great influence of anthropogenic activities, agriculture and industries. Some metals such as lead and arsenic showed low solubility in water but showed high concentration in sediments. Chromium and cadmium present in crops come from water.

scholarly journals Evaluation of the impact of anthropogenic activities on wetland soil qualities: A case study of Isoko South Area of Delta State, Southern Nigeria

2021 ◽  
Vol 6 (2) ◽  
pp. 58-66
Author(s):  
A. N. Ogbaran ◽  
◽  
I. E. Joseph-Akwara ◽  
Keyword(s):  
Heavy Metals ◽  
Soil Depth ◽  
Anthropogenic Activities ◽  
Cadmium Concentration ◽  
Contamination Factor ◽  
Pollution Load Index ◽  
Soil Samples ◽  
Reference Station ◽  
Wetland Soil ◽  
The Impact

This research was carried out to evaluate the impact of dumpsite and farming methods (anthropogenic Activities) on wetland soil qualities. Soil samples were collected from three strategic locations in Irri and Uzere communities at Delta State of Nigeria, and a reference station (control) about 5 km away from the study site. The sampling was done at the end of the rainy season (September, 2020), when the flood water had started rescinding, at two soil depths (5 to 10 cm and 45 to 50 cm). The concentration of iron, nickel, copper and cadmium concentration of the soil samples were determined with the Atomic Absorption Spectrophotometer (AAS), according to procedures approved by ASTM International. Results obtained from the chemical analysis revealed irregular concentration and distribution of the heavy metals within the studied area. Regardless of the sampling depth, the highest heavy metal concentrations were observed around the active dumpsite. Ranking order of the heavy metals’ concentrations in all the sampling locations was Fe ˃ Cu ˃ Ni ˃ Cd. It was observed from the results that the profile concentrations of the heavy metals increased with an increase in the soil depth. Using the contamination factor to assess the heavy metals contamination of the wetland, the results showed that the area ranged from moderate to considerable level of contamination, while pollution load index reveled that wetland soils were moderately polluted with the heavy metals. In terms of the soil pollution, the overall results revealed that area closed to the wastes dumpsite (site 1) was heavy polluted with the heavy metals

scholarly journals The Growth of Plants and Indigenous Bacterial Community Were Significantly Affected by Cadmium Contamination in Soil-Plant System

2021 ◽  
Author(s):  
Yunyan Du ◽  
Dawei Zhang ◽  
Dinggang Zhou ◽  
Lili Liu ◽  
Jinfeng Wu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Bacterial Community ◽  
Oilseed Rape ◽  
Bacterial Communities ◽  
Anthropogenic Activities ◽  
Ecosystem Functions ◽  
Plant System ◽  
Α Diversity ◽  
Soil Bacterial ◽  
The Impact

Abstract Concentrations of heavy metals continue to increase in soil environments as a result of both anthropogenic activities and natural processes. Cadmium (Cd) is one of the most toxic heavy metals and poses health risks to both humans and the ecosystem. Herein, we explore the impacts of Cd on a soil-plant system composed of oilseed rape (Brassica napus and Brassica juncea) and bacteria. The two species of oilseed rape displayed a similar variation trend under Cd treatment. Cd accumulation within plant tissues enhanced with increasing concentrations of Cd in soils, and Cd treatment decreased chlorophyll content and suppressed plant growth. Meanwhile, Cd stress induced the changes of antioxidative enzymes activities including elevating SOD and POD activities and reducing CAT activity. The impact of Cd on the bacterial communities of soils was greater than bacterial communities of plants (phyllosphere and endophyte). The α-diversity of bacterial community in soils declined significantly under higher Cd concentration (30 mg/kg). In addition, soil bacterial communities composition and structure were altered in the presence of higher Cd concentration. Meanwhile, the bacterial community of bulk soil was significantly correlated with Cd, while the variation of rhizosphere soil bacterial community was markedly correlated with Cd and other environmental factors of both soils and plants. These results suggested that Cd could affect both the growth of plants and the indigenous bacterial community in soil-plant system, which might further change ecosystem functions in soils.

scholarly journals The growth of plants and indigenous bacterial community were significantly affected by cadmium contamination in soil–plant system

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yunyan Du ◽  
Dawei Zhang ◽  
Dinggang Zhou ◽  
Lili Liu ◽  
Jinfeng Wu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Anthropogenic Activities ◽  
Ecosystem Functions ◽  
Toxic Heavy Metals ◽  
Plant System ◽  
Composition And Structure ◽  
Α Diversity ◽  
The Impact

AbstractConcentrations of heavy metals continue to increase in soil environments as a result of both anthropogenic activities and natural processes. Cadmium (Cd) is one of the most toxic heavy metals and poses health risks to both humans and the ecosystem. Herein, we explore the impacts of Cd on a soil–plant system composed of oilseed rapes (Brassica napus and Brassica juncea) and bacteria. The results showed that Cd accumulation within tissues of two species of oilseed rapes enhanced with increasing concentrations of Cd in soils, and Cd treatment decreased their chlorophyll content and suppressed rapeseeds growth. Meanwhile, Cd stress induced the changes of antioxidative enzymes activities of both B. napus and B. juncea. Response to Cd of bacterial community was similar in soil-two species of oilseed rapes system. The impact of Cd on the bacterial communities of soils was greater than bacterial communities of plants (phyllosphere and endophyte). The α-diversity of bacterial community in soils declined significantly under higher Cd concentration (30 mg/kg). In addition, soil bacterial communities composition and structure were altered in the presence of higher Cd concentration. Meanwhile, the bacterial communities of bulk soils were significantly correlated with Cd, while the variation of rhizosphere soils bacterial communities were markedly correlated with Cd and other environmental factors of both soils and plants. These results suggested that Cd could affect both the growth of plants and the indigenous bacterial community in soil–plant system, which might further change ecosystem functions in soils.

scholarly journals Effects of Co-Exposure of Nanoparticles and Metals on Different Organisms: A Review

Toxics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 284
Author(s):  
Yasmina M. Abd-Elhakim ◽  
Mohamed M. Hashem ◽  
Khaled Abo-EL-Sooud ◽  
Bayan A. Hassan ◽  
Khlood M. Elbohi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Zinc Oxide ◽  
Anthropogenic Activities ◽  
Aquatic Organisms ◽  
Consumer Products ◽  
Engineered Nanomaterials ◽  
Simultaneous Exposure ◽  
Natural Sources ◽  
Different Types ◽  
The Impact

Wide nanotechnology applications and the commercialization of consumer products containing engineered nanomaterials (ENMs) have increased the release of nanoparticles (NPs) to the environment. Titanium dioxide, aluminum oxide, zinc oxide, and silica NPs are widely implicated NPs in industrial, medicinal, and food products. Different types of pollutants usually co-exist in the environment. Heavy metals (HMs) are widely distributed pollutants that could potentially co-occur with NPs in the environment. Similar to what occurs with NPs, HMs accumulation in the environment results from anthropogenic activities, in addition to some natural sources. These pollutants remain in the environment for long periods and have an impact on several organisms through different routes of exposure in soil, water, and air. The impact on complex systems results from the interactions between NPs and HMs and the organisms. This review describes the outcomes of simultaneous exposure to the most commonly found ENMs and HMs, particularly on soil and aquatic organisms.

scholarly journals Chemical Speciation and Potential Mobility of Heavy Metals in Forest Soil Near Road Traffic in Hafir, Algeria

2021 ◽  
Vol 11 (30) ◽  
Author(s):  
Fatima Zahra Benhachem ◽  
Djamila Harrache
Keyword(s):  
Heavy Metals ◽  
Forest Soil ◽  
Road Traffic ◽  
Major Elements ◽  
Current State ◽  
Financial Interests ◽  
And Migration ◽  
The Impact ◽  
Total Sediment ◽  
Potential Mobility

Background. Different fractions of metals, of varying origin and reactivity, are present in sediments of forest soil. Forest ecosystems are privileged sites for the deposition of persistent organic pollutants carried by the atmosphere. Objectives. The present study describes the current state of metallic contamination around the Hafir forest, located southwest of Tlemcen, Algeria, based on analysis of total sediment mineralization and the speciation of each metal to examine the effects of emissions due to road traffic. Methods. The distribution and migration of ten heavy metals were studied, including cadmium (Cd), nickel (Ni), cobalt (Co), chromium (Cr), manganese (Mn), lead (Pb), copper (Cu), zinc (Zn), iron (Fe), and silver (Ag), and four major elements: potassium (K), sodium (Na), magnesium (Mg), and calcium (Ca) in the superficial horizon of forest soil (0–20 cm) at different road distances (0–1700 m), in two sampling campaigns in the dry and wet seasons around the Hafir forest, Algeria. Results. Bioavailability appears to be relatively low due to the small amount of metals present in the carbonate fraction and the alkaline pH. The impact of road traffic was observed in the variability of the concentrations of several trace elements in forest soil, such as Co, Mn, Ni, Zn, Pb, Ag, Cd. They were generally observed at very high levels along the roadside due to dry atmospheric deposition. Conclusions. The high levels of metals in the carbonate, reducible and residual phases indicate a direct influence on the environment stemming from road traffic near the forest as well as contamination from rainfall in the area. Competing Interests. The authors declare no competing financial interests.

scholarly journals Heavy Metals and Physicochemical Parameters Evaluation in the Upper Reaches of Bonny River, Niger Delta, Nigeria

2021 ◽  
Vol 25 (8) ◽  
pp. 1341-1348
Author(s):  
J.A. Akankali ◽  
I.C. Davies
Keyword(s):  
Heavy Metals ◽  
Niger Delta ◽  
Physicochemical Parameters ◽  
Heavy Metal Contamination ◽  
Anthropogenic Activities ◽  
Physicochemical Characteristics ◽  
Accumulation Factor ◽  
Routine Monitoring ◽  
The Impact

The objectives of the study were to determine distribution of heavy metal contamination in water, sediments and biota (Callinectes amniciola) of the upper reaches of the Bonny Estuary and to determine the impact on physicochemical characteristics of the water body. Sampled was from January to June 2020. The physicochemical parameters of the water varied slightly across the months but were within FEPA/WHO (2003) acceptable limits. Furthermore; the study compared the seasonal variations and determination of Bio-accumulation Factor (BF) of C. amnicola with respect to sediment. The study site is a tidal creek that drains into the main Bonny River channel within Niger Delta, Nigeria. The sampled locations/stations include Trans-Amadi slaughter in Azuabie {N4°81'49.9 and E7°04'63.4}, Okpoka Creek in Abuloma {N4°78'02.43 and E7°06'66.12} and Okirika Jetty {N4°73'70.04 and E7°09'56.93}. Samples of surface water, sediments and swimming crabs were collected from three different stations which were at least 1000 meters apart. The results of this study show that concentrations of the heavy metals (Fe and Zn) were both higher in the three media than the approved limits prescribed by the local regulatory authority. Although Cu was relatively within acceptable limit in the three media. There is therefore the need to control the anthropogenic activities within or around the river. This will help to prevent effluent and solid waste discharges that lead to increase in the concentration of heavy metals in the aquatic environment. Routine monitoring should be encouraged to identify the major sources of heavy metals introduction into the river and their impacts on the aquatic resources.

Impact of Flooding and Urbanisation on the Content of Heavy Metals in the Water and Bottom Sediments of the Amur River

2020 ◽  
Vol 24 (12) ◽  
pp. 32-38
Author(s):  
A.N. Makhinov ◽  
Liu Shuguang ◽  
A.F. Makhinova ◽  
Chaomeng Dai
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Urban Areas ◽  
Sediment Accumulation ◽  
Migration Activity ◽  
Amur River ◽  
Large Cities ◽  
The Amur River ◽  
And Migration ◽  
The Impact

The impact of floods on the migration activity of elements coming from urbanized territories to the Amur river was assessed. The influence of large cities on pollution of water and floodplain ecosystems is revealed. The content of heavy metals in water, bottom sediments, and small watercourses draining urban areas is characterized. The processes of sediment accumulation in the floodplain, their influence on the redistribution of elements and geochemical transformations in the soil space of floodplain soils are studied. Conditions for the accumulation of heavy metals in soils are described, their concentration levels and migration activity are determined. The role of organic matter in swamps and silts on water pollution and bottom sediments of the Amur river is shown. It was found that the main mass transfer of soluble substances and pollutants dispersed fractions of nailc is carried out by water flow during floods.

Sign in / Sign up

Export Citation Format

Share Document