scholarly journals Experimental study on the adsorption of dissolved heavy metals by nano-hydroxyapatite

2020 ◽  
Vol 82 (9) ◽  
pp. 1825-1832
Author(s):  
Yang Zheng ◽  
Jianmin Zhang
Keyword(s):  
Heavy Metals ◽  
Water Environment ◽  
Urban Water ◽  
Environment Pollution ◽  
Adsorption Effect ◽  
Retention System ◽  
Dynamic Experiments ◽  
Matrix Modification ◽  
Dissolved Heavy Metals ◽  
Sand Filler

Abstract Bioretention system is an effective way to solve the problem of urban water environment pollution. In this paper, the difficulty of the existing biological retention system to effectively remove dissolved heavy metals was studied. By comparing the adsorption effect of acid quartz sand filler layers with nano-hydroxyapatite (N-HAP), medical stone, nano-carbon, and biochar, the conclusion is drawn from the static and cylinder dynamic experiments that N-HAP has the best effect of removing Cu2+ and Zn2+, and the effect is long lasting. The scanning electron microscopy results showed that the N-HAP particles were rough and the surface was more rod-shaped, which increased the specific surface area of the N-HAP particles, promoted the complexation and electrostatic interaction of the additives and heavy metal solutions, and facilitated the adsorption of heavy metals. The research results help to improve the technology of filler matrix modification.

scholarly journals DISTRIBUTION AND BEHAVIOUR OF DISSOLVED AND PARTICULATE Pb AND Zn IN JENEBERANG ESTUARY, MAKASSAR

2016 ◽  
Vol 8 (1) ◽  
pp. 11-28 ◽  
Author(s):  
. Najamuddin ◽  
Tri Prartono ◽  
Harpasis s. Sanusi ◽  
I Wayan Nurjaya
Keyword(s):  
Heavy Metals ◽  
Water Environment ◽  
Coastal Region ◽  
Marine Waters ◽  
Detectable Limit ◽  
Geochemical Cycle ◽  
Different Seasons ◽  
Dissolved Heavy Metals ◽  
Adsorption Desorption ◽  
Distribution Behaviour

ABSTRACTDissolved and particulate heavy metals play a role in geochemical cycle as an agent in adsorption-desorption, deposition-resuspension, and dispersion mechanisms of heavy metals in water environment. The objectives of this research were to determine the distribution and behaviour of dissolved and particulate heavy metals Pb and Zn in different seasons (west and east seasons) at Jeneberang Estuary of Makassar. Concentrations of Pb and Zn were analysed using Atomic Adsorption Spectrophotometry based on APHA, AWWA, WEF (2005). The concentration of dissolved Pb in the riverine, estuarine, and marine waters were in the range (average) of <0.002 mg/L (below detectable limit), 0.013-0.144 mg/L (0.047 mg/L), 0.016-0.198 mg/L (0.079 mg/L); and the concen-tration of dissolved Zn were in the range (average) of <0.002 mg/L (below detectable limit), <0.002-0.014 mg/L (0.005 mg/L), <0.002-0.083 mg/L (0.017 mg/L). Meanwhile, the concentration of parti-culate Pb were in the range (average) of 1.807-2.569 mg kg-1 (2.215 mg kg-1), 0.521-1.272 mg kg-1 (0.911 mg kg-1), 0.465-2.182 mg kg-1 (1.033 mg kg-1), and the concentration of particulate Zn were in the range (average) of 19.151-90.942 mg kg-1 (51.710 mg kg-1), 16.999-63.059 mg kg-1 (31.694 mg   kg-1), 19.439-80.283 mg kg-1 (45.554 mg kg-1) in the riverine, estuarine and marine waters, respecti-vely. Behaviour of dissolved heavy metals Pb and Zn showed that the concentrations tended to increase (desorption) along the gradient of high salinity as a  result of the higher heavy metals input from coastal region than that riverine regimes.Keywords: distribution, behaviour, dissolved, particulate, heavy metal, Jeneberang Estuary

scholarly journals DISTRIBUTION AND BEHAVIOUR OF DISSOLVED AND PARTICULATE Pb AND Zn IN JENEBERANG ESTUARY, MAKASSAR

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
. Najamuddin ◽  
Tri Prartono ◽  
Harpasis S. Sanusi ◽  
I Wayan Nurjaya
Keyword(s):  
Heavy Metals ◽  
Water Environment ◽  
Coastal Region ◽  
Marine Waters ◽  
Detectable Limit ◽  
Geochemical Cycle ◽  
Different Seasons ◽  
Dissolved Heavy Metals ◽  
Adsorption Desorption ◽  
Distribution Behaviour

<p align="center"><strong><em>ABSTRACT</em></strong></p><p><em>Dissolved and particulate heavy metals play a role in geochemical cycle as an agent in adsorption-desorption, deposition-resuspension, and dispersion mechanisms of heavy metals in water environment. The objectives of this research were to determine the distribution and behaviour of dissolved and particulate heavy metals Pb and Zn in different seasons (west and east seasons) at Jeneberang Estuary of Makassar. Concentrations of Pb and Zn were analysed using Atomic Adsorption Spectrophotometry based on </em><em>APHA, AWWA, WEF (2005). The concentration of dissolved Pb in the riverine, estuarine, and marine waters were in the range (average) of &lt;0.002 mg/L (below detectable limit), 0.013-0.144 mg/L (0.047 mg/L), 0.016-0.198 mg/L (0.079 mg/L); and the concen-tration of dissolved Zn were in the range (average) of &lt;0.002 mg/L (below detectable limit), &lt;0.002-0.014 mg/L (0.005 mg/L), &lt;0.002-0.083 mg/L (0.017 mg/L). Meanwhile, the concentration of parti-culate Pb were in the range (average) of 1.807-2.569 mg kg<sup>-1</sup> (2.215 mg kg<sup>-1</sup>), 0.521-1.272 mg kg<sup>-1</sup> (0.911 mg kg<sup>-1</sup>), 0.465-2.182 mg kg<sup>-1</sup> (1.033 mg kg<sup>-1</sup>), and the concentration of particulate Zn were in the range (average) of 19.151-90.942 mg kg<sup>-1 </sup>(51.710 mg kg<sup>-1</sup>), 16.999-63.059 mg kg<sup>-1</sup> (31.694 mg   kg<sup>-1</sup>), 19.439-80.283 mg kg<sup>-1</sup> (45.554 mg kg<sup>-1</sup>) in the riverine, estuarine and marine waters, respecti-vely. Behaviour of dissolved heavy metals Pb and Zn showed that the concentrations tended to increase (desorption) along the gradient of high salinity as a  result of the higher heavy metals input from coastal region than that riverine regimes.</em></p><p><strong><em>Keywords</em></strong><em>: </em><em>distribution, behaviour, dissolved, particulate, heavy metal</em><em>,</em><em> </em><em>Jeneberang Estuary</em><strong></strong></p>

scholarly journals Water Quality Assessments for Urban Water Environment

Water ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1686
Author(s):  
Pankaj Kumar
Keyword(s):  
Water Quality ◽  
Water Environment ◽  
Urban Water ◽  
Freshwater Resources ◽  
Intrinsic Connection ◽  
Quality Assessments

Since ages, human societies have witnessed the intrinsic connection between their all-encompassing development and freshwater resources [...]

scholarly journals Roles of Wastewater Systems for the Preservation/Renovation of Urban Water Environment.

1999 ◽  
pp. 1-14
Author(s):  
Environmental Engineering Committee ◽  
Subcommittee on Roles of Wastewater
Keyword(s):  
Water Environment ◽  
Urban Water ◽  
Wastewater Systems

Status of water environment pollution in the Xixi Wetland and its ecological treatment countermeasures

2009 ◽  
Vol 4 (2) ◽  
pp. 228-232 ◽  
Author(s):  
Wenyue Chen ◽  
Jiemin Zheng ◽  
Zhongquan Li ◽  
Guozheng Shen ◽  
Yuchen Li
Keyword(s):  
Water Environment ◽  
Environment Pollution ◽  
Ecological Treatment ◽  
Xixi Wetland

Dynamics of dissolved heavy metals in reservoir bays under different hydrological regulation

2021 ◽  
Vol 595 ◽  
pp. 126042
Author(s):  
R. Hao ◽  
W. Yin ◽  
H.Y. Jia ◽  
J.F Xu ◽  
N.X. Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Dissolved Heavy Metals

Opportunities for Biotesting of the Water Environment for Heavy Metal Pollution Using a Plant Spirodela polyrhiza (L.) Schleid

2021 ◽  
Vol 25 (5) ◽  
pp. 52-57
Author(s):  
S.I. Alekseeva ◽  
Zh.M. Okhlopkova
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Growth And Development ◽  
Water Environment ◽  
Biological Testing ◽  
Spirodela Polyrhiza ◽  
Model Object ◽  
Chlorophyll A And B

The methods of biotesting of the aquatic environment based on the representative of the duckweed family (lat. Lemnaceae) greater duckweed (Spirodela polyrhiza (L.) Schleid) were considered. A review is presented on the use of greater duckweed as a model object in biological testing, in partic-ular, when exposed to heavy metals salts. When cultivated Spirodela polyrhiza with the addition of heavy metals salts, a change in the growth and development of plants in the experienced line of plants was revealed, as well as a decrease in the content of chlorophyll a and b.

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