The Effect of Different Cleaning Methods on Needles for Assessing the Atmospheric Heavy Metal Retention Capacity of Three Coniferous Trees

Urban air pollution has received increasing attention in recent years. To investigate the interaction between several heavy metal elements and the degree of atmospheric pollution, the leaves of three evergreen tree species—Chinese juniper (Juniperus chinensis L.), dragon juniper (Juniperus chinensis L. ‘Kaizuca’), and cedar (Cedrus deodara (Roxb. ex D.Don) G.Don)—were collected from main road intersections in the urban area of Tianjin, China. Two different treatments—water washing (WW) and ethanol washing (EW)—were used, and the contents of Cu, Mn, Cd, and Zn were measured in both washed and unwashed (UW) leaves. It was found that the heavy metal contents within Chinese juniper and dragon juniper were ranked as Mn > Zn > Cu > Cd, and the metal accumulation index (MAI) value was higher for dragon juniper. For the three plants, water washed off 5.36% to 58.58% of the total heavy metals in the needles, while ethanol washed off 16.08% to 71.60% of the total. Both washes were more effective for Cu, Zn, and Cd, and especially for the element Cd. Ethanol could clean off 38.64% to 71.60% of the total Cd from the leaves. Ethanol had a better elution effect compared to water, and the trend of the Cd content in the leaves of the three plants showed a change after the use of different washing methods, which suggests that the water washing may have masked the real difference.

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Characterization and Heavy Metal Retention Capacity of Soils in Mangrove Forest of the Niger Delta, Nigeria

Communications in Soil Science and Plant Analysis ◽

10.1080/00103620500192225 ◽

2005 ◽

Vol 36 (15-16) ◽

pp. 2033-2045 ◽

Cited By ~ 3

Author(s):

A. A. Amusan ◽

I. F. Adeniyi

Keyword(s):

Heavy Metal ◽

Niger Delta ◽

Mangrove Forest ◽

Retention Capacity ◽

Metal Retention

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Strippable Polymeric Nanocomposites Comprising “Green” Chelates, for the Removal of Heavy Metals and Radionuclides

Polymers ◽

10.3390/polym13234194 ◽

2021 ◽

Vol 13 (23) ◽

pp. 4194

Author(s):

Gabriela Toader ◽

Daniela Pulpea ◽

Traian Rotariu ◽

Aurel Diacon ◽

Edina Rusen ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Complexing Agents ◽

Mechanical And Thermal Properties ◽

Polymeric Nanocomposites ◽

Retention Capacity ◽

Metal Retention ◽

Removal Of Heavy Metals ◽

Iminodisuccinic Acid ◽

Minimal Environmental Impact

The issue of heavy metal and radionuclide contamination is still causing a great deal of concern worldwide for environmental protection and industrial sites remediation. Various techniques have been developed for surface decontamination aiming for high decontamination factors (DF) and minimal environmental impact, but strippable polymeric nanocomposite coatings are some of the best candidates in this area. In this study, novel strippable coatings for heavy metal and radionuclides decontamination were developed based on the film-forming ability of polyvinyl alcohol, with the remarkable metal retention capacity of bentonite nanoclay, together with the chelating ability of sodium alginate and with “new-generation” “green” complexing agents: iminodisuccinic acid (IDS) and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC). These environmentally friendly water-based decontamination solutions are capable of generating strippable polymeric films with optimized mechanical and thermal properties while exhibiting high decontamination efficiency (DF ≈ 95–98% for heavy metals tested on glass surface and DF ≈ 91–97% for radionuclides 241Am, 90Sr-Y and 137Cs on metal, painted metal, plastic, and glass surfaces).

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Adsorption of heavy metal by natural clayey soil

Journal of Applied Geology ◽

10.22146/jag.7183 ◽

2015 ◽

Vol 3 (1) ◽

Author(s):

Wawan Budianta

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Soil Sample ◽

Waste Disposal ◽

Clayey Soil ◽

Batch Experiment ◽

Concentrated Solutions ◽

Retention Capacity ◽

Metal Retention ◽

Soil Batch

This study focused on the capability of Clayey soil to retain and release heavy metals. Batch experiment for sample of clayey soil was conducted with several concentrated solutions of heavy metals. The results show that the clayey soil sample may have a relatively high heavy metal retention capacity. This is particularly positive in the context of municipal waste disposal (landfills) in Indonesia Keywords: Adsorption, heavy metal, clayey soil, batch experiment

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Distribution and Contamination Status of Heavy Metals in the Surface Sediments along Western Coast of Bali Strait, Banyuwangi

TORANI: Journal of Fisheries and Marine Science ◽

10.35911/torani.v1i2.4439 ◽

2018 ◽

Vol 1 (2) ◽

Author(s):

Defri Yona ◽

Syarifah Hikmah Julinda Sari ◽

Anedathama Kretarta ◽

Citra Ravena Putri Effendy ◽

Misba Nur Aini ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Metal Pollution ◽

Contamination Factor ◽

Pollution Index ◽

Western Coast ◽

Sampling Locations ◽

Accumulation Index ◽

Geo Accumulation Index ◽

Geo Accumulation

This study attempted to analyze the distribution and contamination status of heavy metals (Cu, Fe and Zn) along western coast of Bali Strait in Banyuwangi, East Java. Bali Strait is one of the many straits in Indonesia with high fisheries activities that could potentially contributed to high heavy metal pollution. There were five sampling areas from the north to south: Pantai Watu Dodol, Pantai Kalipuro, Ketapang Port, Pantai Boom and Muncar as the fish landing area. Heavy metal pollution in these locations comes from many different activities such as tourism, fish capture and fish industry and also domestic activities. Contamination factor (CF), geo-accumulation index (Igeo) and enrichment factor (EF) of each heavy metal were calculated to obtain contamination status of the research area. The concentrations of Fe were observed the highest (1.5-129.9 mg/kg) followed by Zn (13.2-23.5 mg/kg) and Cu (2.2-7.8 mg/kg). The distribution of Cu, Fe and Zn showed variability among the sampling locations in which high concentrations of Cu and Zn were higher in Ketapang Port, whereas high concentration of Fe was high in almost all sampling locations. According to the pollution index, contamination factors of Cu, Fe and Zn were low (CF < 1 and Igeo < 1). However, high index of EF (> 50) showed high influence of the anthropogenic activities to the contribution of the metals to the environment. This could also because of the high background value used in the calculation of the index due to the difficulties in finding background value from the sampling areas.Keywords: heavy metals, pollution index, contamination factor, geo-accumulation index, Bali Strait

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HEAVY METAL CONTAMINATION AND BIOTECHNOLOGICAL CLEANING METHODS

10.36074/21.08.2020.v1.25 ◽

2020 ◽

Author(s):

Olga Bryninger

Keyword(s):

Heavy Metal ◽

Metal Contamination ◽

Heavy Metal Contamination ◽

Cleaning Methods

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Applications of Bentonite to Soil Decontamination

Revista de Chimie ◽

10.37358/rc.18.7.6397 ◽

2018 ◽

Vol 69 (7) ◽

pp. 1695-1698

Author(s):

Marin Rusanescu ◽

Carmen Otilia Rusanescu ◽

Gheorghe Voicu ◽

Mihaela Begea

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Laboratory Experiments ◽

Experimental Studies ◽

Heavy Metal Concentration ◽

Polluted Soil ◽

Raw Material ◽

Soil Decontamination ◽

Metal Retention ◽

Removal Of Heavy Metals

A calcium bentonite from Orasu Nou deposit (Satu Mare Romania) was used as raw material. We have conducted laboratory experiments to determine the influence of bentonite on the degree of heavy metal retention. It has been observed that the rate of retention increases as the heavy metal concentration decreases. Experimental studies have been carried out on metal retention ( Zn) in bentonite. In this paper, we realized laboratory experiments for determining the influence of metal (Zn) on the growth and development of two types of plants (Pelargonium domesticum and Kalanchoe) and the effect of bentonite on the absorption of pollutants. These flowers were planted in unpolluted soil, in heavy metal polluted soil and in heavy metal polluted soil to which bentonite was added to observe the positive effect of bentonite. It has been noticed that the flowers planted in unpolluted soil and polluted with heavy metals to which bentonite has been added, the flowers have flourished, the leaves are still green and the plants whose soils have been polluted with heavy metals began to dry after 6 days, three weeks have yellowish leaves and flowers have dried. Experiments have demonstrated the essential role of bentonite for the removal of heavy metals polluted soil.

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