Arsenic, lead and cadmium removal potential of Pteris multifida from contaminated water and soil

Abstract This contribution is a comparison study between synthetic hydroxyapatite (Sy-HAP) and commercial hydroxyapatite (C-HAP) for the removal of Pb2+ and Cd2+ ions present in wastewater from industrial effluents. The obtained results show that the equilibrium time required for complete adsorption of Pb2+ and Cd2+ ions on C-HAP and Sy-HAP is 15 min for both. The obtained removal efficiencies for Sy-HAP are 95.52% and 90.91% for Pb2+ and Cd2+ ions, respectively. Whereas, C-Hap presents lower removal efficiencies of 86.53% and 81.43% for Pb2+ and Cd2+ ions, respectively. Maximum adsorption was observed at pH 5; at lower pH levels adsorption was less. The experimental kinetic data fitted with the second order kinetic model. Thermodynamically, the adsorption process was endothermic and spontaneous in nature. Isotherm adsorption studies indicated that Langmuir, Freundlich and Temkin are the most valid models to describe and evaluate the adsorption process. The EDX results also confirmed the presence of lead and cadmium in adsorbents after adsorption. Finally, the HAP porous materials possess great potential for the removal of Pb2+ and Cd2+ ions from aqueous solutions and wastewater from industrial effluents.

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Valorization of Adenanthera pavonina seeds as a potential biosorbent for lead and cadmium removal from single and binary contaminated system

Geology Ecology and Landscapes ◽

10.1080/24749508.2018.1464266 ◽

2018 ◽

Vol 2 (4) ◽

pp. 275-287

Author(s):

Bahnika Sen ◽

Shivani Goswami ◽

Gitika Devi ◽

Hari Prasad Sarma ◽

Akhilesh Bind

Keyword(s):

Cadmium Removal ◽

Adenanthera Pavonina ◽

Lead And Cadmium

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Ethylenesulfide as a useful agent for incorporation on the biopolymer chitosan in a solvent-free reaction for use in lead and cadmium removal

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-010-1205-y ◽

2010 ◽

Vol 106 (2) ◽

pp. 369-373 ◽

Cited By ~ 15

Author(s):

Edson C. da Silva Filho ◽

Pedro D. R. Monteiro ◽

Kaline S. Sousa ◽

Claudio Airoldi

Keyword(s):

Solvent Free ◽

Cadmium Removal ◽

Lead And Cadmium ◽

Solvent Free Reaction

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Chemical Analysis of Rock and Water from dug Wells in a Residential Area in Lagos State, Nigeria

International Journal of Chemistry ◽

10.5539/ijc.v7n2p122 ◽

2015 ◽

Vol 7 (2) ◽

pp. 122

Author(s):

Mopelola Omotoso ◽

Ibrahim Amoo

Keyword(s):

Heavy Metals ◽

Underground Water ◽

Polluted Water ◽

Contaminated Water ◽

Adsorbent Dosage ◽

Lead And Cadmium ◽

Metals Removal ◽

Lagos State ◽

Dug Wells ◽

Cadmium And Lead

Samples of rock deposit dug out from wells at Alimosho local government in Lagos state, Nigeria were characterized for chemical composition and ultimate utilization. Fourier Transform Infrared Spectroscopy (FTIR), X-Ray diffraction (XRD) and Atomic Absorption Spectroscopy (AAS) were used to identify the rock as a mixed clay rock containing 35.04% Illite, 25.64% Illite plus Quartz, 22.20% Kaolinite and 17.09% Feldspar. This was corroborated by cation determination that showed the rock to be predominantly clayey rock. The mean concentrations of lead and copper in water of the wells in the rock location are 0.004mg/L and 0.05mg/L respectively while cadmium is less than detectable limit. The well water in the area studied is therefore not contaminated by these heavy metals. Heavy metals removal by the mixed clay from polluted underground water was studied using AAS. A general increase of sorption was observed with increase in the adsorbent dosage. 20g of the rock adsorbed a higher percentage of copper (80.23%) than lead and cadmium that were 70.25% and 65.83% respectively. The percentage of heavy metals adsorbed confirms the use of mixed clay minerals as a contaminants removal from the underground polluted water. The rock adsorbed copper readily than cadmium and lead. The maximum amount of lead removed from the contaminated underground water of the defunct battery site across the adsorbent dosage (5g, 10g, 15g and 20g) were 1.20mg/L, 3.19mg/L, 3.69mg/L and 4.09mg/L respectively indicating the effect of increase in adsorbent dosage in remediating the lead contaminated water. This data showed that the rock can be used to remove these heavy metals from contaminated water.

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Effects of conditioning and treatment of chabazite and clinoptilolite prior to lead and cadmium removal

Environmental Science & Technology ◽

10.1021/es00043a009 ◽

1993 ◽

Vol 27 (6) ◽

pp. 1108-1116 ◽

Cited By ~ 103

Author(s):

Sabeha Kesraoui-Ouki ◽

Christopher Cheeseman ◽

Roger Perry

Keyword(s):

Cadmium Removal ◽

Lead And Cadmium

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Batch and Column Scale Removal of Cadmium from Water Using Raw and Acid Activated Wheat Straw Biochar

Water ◽

10.3390/w11071438 ◽

2019 ◽

Vol 11 (7) ◽

pp. 1438 ◽

Cited By ~ 14

Author(s):

Muhammad Asif Naeem ◽

Muhammad Imran ◽

Muhammad Amjad ◽

Ghulam Abbas ◽

Muhammad Tahir ◽

...

Keyword(s):

Wheat Straw ◽

Cadmium Concentration ◽

Cost Effective ◽

Contaminated Water ◽

Cadmium Removal ◽

Solution Ph ◽

Scale Removal ◽

Freundlich Adsorption Isotherm ◽

Pseudo Second Order ◽

Good Retention

The present study examined novel wheat straw biochar (WSB) and acid treated wheat straw biochar (AWSB) for cadmium removal from contaminated water. A series of batch and column scale experiments was conducted to evaluate the potential of WSB and AWSB for cadmium removal at different biochar dosage (0.5–8 g/L), initial cadmium concentration (5–100 mg/L), solution pH (2–8) and contact time (5–180 min). Results revealed that cadmium adsorption decreased by increasing biochar dosage from 0.5 to 8 g/L; however, optimum dosage for maximum (99%) removal of cadmium was 2 g/L by WSB and 1 g/L by AWSB. Enhanced cadmium removal potential by AWSB is attributed to increased surface area, microporosity and variation in functional groups. Equilibrium experimental data was well described by Freundlich adsorption isotherm whereas kinetic data were better explained with pseudo-second order model. Both WSB and AWSB have shown good adsorption capacity of 31.65 mg/g and 74.63 mg/g, respectively, that is comparable with other costly adsorbents. Columns packed with WSB and AWSB at laboratory scale have also shown good retention of cadmium with excellent reusability. These findings indicate that WSB especially AWSB could be a promising, cost-effective and environmental friendly strategy for the removal of metals from contaminated water.

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Determination of Lead and Cadmium in Sugar and Cement Industry Effluents of North Karnataka

JOURNAL OF ADVANCES IN CHEMISTRY ◽

10.24297/jac.v10i3.2285 ◽

2014 ◽

Vol 10 (3) ◽

pp. 2351-2354

Author(s):

Vinayak Balappanavar ◽

Shivalingayya Hiremath ◽

Shivanand Mathapati ◽

Danesh Hiremath ◽

M.S. Yadawe ◽

...

Keyword(s):

Heavy Metal ◽

Physicochemical Analysis ◽

Cement Industry ◽

Permissible Limit ◽

Contaminated Water ◽

Cadmium Contamination ◽

Lead And Cadmium ◽

Drinking Purposes ◽

Surrounding Areas

The aim of this study is to assess the extent of lead and cadmium contamination in effluent released from sugar and Cement Industries in north Karnataka. Physicochemical analysis of effluent reveals that the concentration of lead (0.05mg/l)and cadmium(0.01mg/l) is greater than the permissible limit. The effluent as well as contaminated water is extensively used for the irrigation and drinking purposes in the surrounding areas. Several studies of heavy metal constituents in molasses and other sugars have been conducted.

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