Analysis of possibility of phytotechnologies usage for cleaning of Ingulets water system from heavy metals

In this study, water samples were collected randomly from water system of Beijing urban area and analysed by inductively coupled plasma-atomic emission spectrometry (ICP-AES) method to determine the contents of harmful heavy metals (Hg, Cd, Zn, Cu, Ni, Cr, Sb, As and Pb). The concentrations of detected heavy metals were found between detection limit of the instrument to 387.196 mg/L. Among them, one sample gave a very high concentration of copper element. In order to get rid of this copper ion away, a chelating type fiber was used to treat the water sample. After treatment with chelating fiber, the concentration of copper was lowered to <10-5mg/L.

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Radiochemical Techniques Applied to Laboratory Studies of Water Leaching of Heavy Metals from Coal Fly Ash

Water Science & Technology ◽

10.2166/wst.1983.0075 ◽

1983 ◽

Vol 15 (11) ◽

pp. 25-47 ◽

Cited By ~ 9

Author(s):

L Goetz

Keyword(s):

Heavy Metals ◽

Fly Ash ◽

Power Plants ◽

Coal Fly Ash ◽

Water System ◽

Coal Ash ◽

Distribution Coefficients ◽

Water Leaching ◽

Nuclear Techniques ◽

Pulverized Fuel

Assessment of the potential environmental impact of heavy metals (HM) mobilized by coal-fired power plants showed that water leaching of HM from pulverized fuel ash may for certain HM constitute an important pathway to the aquatic environment. This process was therefore investigated in more detail by laboratory experiments. Batch experiments were performed in order to simulate ash pond conditions, whereas column experiments were carried out to represent water leaching from fly ash deposits. Using highly sensitive radiochemical techniques such as radioactive tracers and neutron activation of fly ash the fate of a single HM could be easily followed even in very low concentration experiments. Employing radioisotopic tracers the distribution coefficients of simple ionic forms of As, Sb, Bi, Se, Te, Cr, Mo, W, Ni, Cd in a coal fly ash/water system could be determined as a function of pH. Results obtained on the adsorption and desorption behaviour of HM on coal fly ash can be explained in part on the basis of the surface predominance and the aqueous chemistry of single ionic, mainly anionic, forms of the relative elements. But ion exchange and coprecipitation phenomena also seem to be important processes. The nature and concentration of ions contained originally in the water used (distilled water, fly ash leachate and seawater) were found to have a strong influence on the sorptive behaviour of HM on coal ashes. The high degree of applicability of radiochemical and nuclear techniques to coal ash water leaching problems has been demonstrated and further points for subsequent research in this field possibly using nuclear techniques are indicated.

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Instruments to reduce the leaching of heavy metals from building materials in the Netherlands

Water Science & Technology ◽

10.2166/wst.2007.075 ◽

2007 ◽

Vol 55 (3) ◽

pp. 79-85 ◽

Cited By ~ 2

Author(s):

A.J.H. van Breemen ◽

P.H.M. Vermij

Keyword(s):

Heavy Metals ◽

Surface Water ◽

The Netherlands ◽

Surface Waters ◽

Best Practice ◽

Building Materials ◽

Construction Materials ◽

Water System ◽

Sealing Material ◽

Metal Building

In the Netherlands the leaching of heavy metals from metal building and constructing materials results in serious contamination problems in the water system. The most common sources of these heavy metals in construction materials are copper waterworks and roofs, zinc roofs, gutters and rain pipes, zinced steel, stainless steel, and lead sealing material. In urban waters the surface water and sediment standards are often exceeded. Although building and construction materials are certainly not the only source of heavy metals, they are an important part of the problem. This article focuses on six instruments that are in use in the Netherlands to try to reduce impact on the surface waters. In addition to this, national as well as international, a reconsideration of the risks and surface water standards for several heavy metals is considered. A balanced use of instruments can be considered as the application of a best practice.

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Pollution characteristics and risk assessment of heavy metals in the surface sediments of Dongting Lake water system during normal water period

European Journal of Remote Sensing ◽

10.1080/22797254.2020.1763207 ◽

2020 ◽

pp. 1-11

Author(s):

Bao Qian ◽

Cong Tang ◽

Yu Yang ◽

Xiao Xiao

Keyword(s):

Heavy Metals ◽

Risk Assessment ◽

Lake Water ◽

Surface Sediments ◽

Water System ◽

Dongting Lake ◽

Pollution Characteristics ◽

Normal Water

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Preparation of Cellulose/Chitin Blend Materials and Influence of Their Properties on Sorption of Heavy Metals

Sustainability ◽

10.3390/su13116460 ◽

2021 ◽

Vol 13 (11) ◽

pp. 6460

Author(s):

Dao Zhou ◽

Hongyu Wang ◽

Shenglian Guo

Keyword(s):

Mechanical Properties ◽

Heavy Metals ◽

Water System ◽

Tensile Tests ◽

Atomic Absorption Spectrophotometry ◽

Scanning Electron Micrographs ◽

Mesh Structure ◽

Chitin Content ◽

Sorption Ability ◽

Kinetics Of

A series of biodegradable cellulose/chitin materials (beads and membranes) were successfully prepared by mixing cellulose with chitin in an NaOH/thiourea–water system and coagulation in a H2SO4 solution. The effects of chitin content on the materials’ mechanical properties, morphology, structure, and sorption ability for heavy metal ions (Pb2+, Cd2+, and Cu2+) were studied by tensile tests, scanning electron micrographs, Fourier transform infrared spectroscopy, and atomic absorption spectrophotometry. The results revealed that the cellulose/chitin blends exhibited relatively good mechanical properties, a homogeneous, microporous mesh structure, and the existence of strong hydrogen bonds between molecules of cellulose and chitin when the chitin content was less than 30 wt%, which indicated a good compatibility of the cellulose/chitin materials. Furthermore, in the same chitin content range, Pb2+, Cd2+, and Cu2+ can be adsorbed efficiently onto the cellulose/chitin beads at pH0 = 5, and the sorption capacity of the beads is more than that of chitin flakes. This shows that the hydrophilicity and microporous mesh structure of the blends are favorable for the kinetics of sorption. Preparation of environmentally friendly cellulose/chitin blend materials provides a simple and economical way to remove and recover heavy metals, showing a potential application of chitin as a functional material.

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