scholarly journals Heavy metals’ removal from aqueous environments using silica sulfuric acid

2021 ◽  
Author(s):  
Nasrin Hosseinahli ◽  
Maherram Hasanov ◽  
Maryam Abbasi
Keyword(s):  
Heavy Metals ◽  
Sulfuric Acid ◽  
Removal Efficiency ◽  
Removal Rate ◽  
Health Concern ◽  
Contaminated Water ◽  
Silica Sulfuric Acid ◽  
Metals Removal ◽  
Technological Growth ◽  
Aqueous Environments

Abstract There is a growing environmental and health concern associated with contamination by heavy metals. It has also been intensified due to an increase of the exposure to such pollutants as a result of industrial and technological growth. Therefore, it is necessary to remove heavy metals in contaminated water to eliminate the associated risks. This study focused on the removal of heavy metal ions using silica sulfuric acid (SSA). A comprehensive study was conducted to assess the effect of different factors on the adsorption by SSA as well as selectivity properties of the adsorbent, kinetic and thermodynamic studies of the adsorption process. A batch test was used to remove heavy metals from a multi-element solution containing Ni(II), Pb(II), Mn(II), Cu(II), and Cd(II). The results showed that removal rate reached its peak at pH, string time, and adsorbent amount equal to 8, 60 min, and 0.04 g/mL of solution, respectively. The removal efficiency of Ni2+, Cd2+, Mn2+ dropped by increasing the volume of solution and smoothed at 150 mL while the removal of Pb2+ and Cu2+ did not vary with the volume. The removal efficiency by SSA was decreased as Pb > >Mn > >Ni ≥ Cu > Cd. In general, SSA successfully removed heavy metals from contaminated water.

Enhancing the soil heavy metals removal efficiency by adding HPMA and PBTCA along with plant washing agents

2017 ◽  
Vol 339 ◽  
pp. 33-42 ◽  
Author(s):  
Yaru Cao ◽  
Shirong Zhang ◽  
Guiyin Wang ◽  
Ting Li ◽  
Xiaoxun Xu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Removal Efficiency ◽  
Heavy Metals Removal ◽  
Soil Heavy Metals ◽  
Metals Removal

Hydroponics reducing effluent's heavy metals discharge

2009 ◽  
Vol 59 (1) ◽  
pp. 175-183 ◽  
Author(s):  
Abdellah Rababah ◽  
Ahmad Al-Shuha
Keyword(s):  
Heavy Metals ◽  
Removal Efficiency ◽  
Value Added ◽  
Treated Wastewater ◽  
Hydroponic System ◽  
Heavy Metals Removal ◽  
Treated Effluent ◽  
Metals Removal ◽  
Nutrient Film Technique ◽  
Removal Efficiencies

This paper investigates the capacity of Nutrient Film Technique (NFT) to control effluent's heavy metals discharge. A commercial hydroponic system was adapted to irrigate lettuces with primary treated wastewater for studying the potential heavy metals removal. A second commercial hydroponic system was used to irrigate the same type of lettuces with nutrient solution and this system was used as a control. Results showed that lettuces grew well when irrigated with primary treated effluent in the commercial hydroponic system. The NFT-plant system heavy metals removal efficiency varied amongst the different elements, The system's removal efficiency for Cr was more than 92%, Ni more than 85%, in addition to more than 60% reduction of B, Pb, and Zn. Nonetheless, the NFT-plants system removal efficiencies for As, Cd and Cu were lower than 30%. Results show that lettuces accumulated heavy metals in leaves at concentrations higher than the maximum acceptable European and Australian levels. Therefore, non-edible plants such as flowers or pyrethrum are recommended as value added crops for the proposed NFT.

Removal of Some Heavy Metals by Electrocoagulation

2012 ◽  
Vol 468-471 ◽  
pp. 2882-2890 ◽  
Author(s):  
R. H. Al Anbari ◽  
S. M. Alfatlawi ◽  
J. H. Albaidhani
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Removal Efficiency ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Efficient Treatment ◽  
Electrolytic Cells ◽  
Removal Capacity ◽  
Metals Removal ◽  
Working Parameters

Heavy metal removal by electrocoagulation using iron electrodes material was investigated in this paper. Several working parameters, such as pH, current density and heavy metal ions concentration were studied in an attempt to achieve a higher removal capacity. A simple and efficient treatment process for removal of heavy metals is essentially necessary. The performance of continuous flow electrocoagulation system, with reactor consists of a ladder series of twelve electrolytic cells, each cell containing stainless steel cathode and iron anode. The treatment of synthetic solutions containing Zn 2+,Cu 2+,Ni 2+,Cr 3+,Cd 2+ and Co 2+ ,has been investigated. Results showed that iron is very effective as sacrificial electrode material for heavy metals removal efficiency and cost points. Also it was concluded that the chromium has lower efficient removal as compared to zinc, copper and nickel. At the same time cadmium and cobalt have minimum removal efficiency.

Enhancement of heavy metals removal efficiency from liquid wastes by using potential-triggered proton self-exchange effects

2014 ◽  
Vol 130 ◽  
pp. 40-45 ◽  
Author(s):  
Zhongde Wang ◽  
Yang Ma ◽  
Xiaogang Hao ◽  
Wei Huang ◽  
Guoqing Guan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Removal Efficiency ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Exchange Effects ◽  
Liquid Wastes

Transport of Heavy Metals during Infiltration of Simulated Highway Runoff through Large-Scale Soil Columns

1996 ◽  
Vol 1523 (1) ◽  
pp. 160-166 ◽  
Author(s):  
Ronan V. Igloria ◽  
Wade E. Hathhorn ◽  
David R. Yonge
Keyword(s):  
Heavy Metals ◽  
Large Scale ◽  
Washington State ◽  
Small Scale ◽  
Contaminated Water ◽  
Soil Columns ◽  
Assimilative Capacity ◽  
Actual Performance ◽  
Metals Removal ◽  
Actual Field

An evaluation was conducted of the performance of three Washington State soils in attenuating trace heavy metals (Cd, Cu, Pb, and Zn) in contaminated water. Although previous investigations of this kind have used relatively small-scale soil columns as indicators of actual performance, large-scale soil columns (0.3 m in diameter and 1 m deep) were tested under loading conditions similar to actual field infiltration basins. The soil columns were loaded periodically to produce quasi-field conditions, with the corresponding metal transport being observed as a function of depth. The data indicate that metals speciation and background metals present in the soil are important factors to consider, because they can affect expected metals removal rates of soils. The hydraulics of the system played a secondary role to the geochemistry. Results suggest that infiltration can be a viable alternative in disposing of runoff at low metals concentrations, if the soil-water system's assimilative capacity is not taken for granted.

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

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.

scholarly journals Heavy metals removal in aqueous environments using bark as a biosorbent

2014 ◽  
Vol 12 (1) ◽  
pp. 391-404 ◽  
Author(s):  
A. Şen ◽  
H. Pereira ◽  
M. A. Olivella ◽  
I. Villaescusa
Keyword(s):  
Heavy Metals ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Aqueous Environments

Influent concentrations and removal performances of metals through municipal wastewater treatment processes

2011 ◽  
Vol 63 (9) ◽  
pp. 1967-1973 ◽  
Author(s):  
J.-M. Choubert ◽  
M. Pomiès ◽  
S. Martin Ruel ◽  
M. Coquery
Keyword(s):  
Removal Efficiency ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Domestic Wastewater ◽  
Extensive Study ◽  
Municipal Wastewater Treatment ◽  
Dissolved Metals ◽  
Treatment Processes ◽  
Metals Removal ◽  
Treatment Stage

This extensive study aimed at quantifying the concentrations and removal efficiency of 23 metals and metalloids in domestic wastewater passing through full-scale plants. Nine facilities were equipped with secondary biological treatment and three facilities were equipped with a tertiary treatment stage. The metals investigated were Li, B, Al, Ti, V, Cr, Fe, Ni, Co, Cu, Zn, As, Se, Rb, Mo, Ag, Cd, Sn, Sb, Ba, Tl, Pb and U. Particulate and dissolved metals were measured using 24 h composite samples at each treatment stage. In influents, total concentrations of Cd, Sb, Co, Se, U, Ag, V were below a few μg/L, whereas at the other extremity Zn, B, Fe, Ti, Al were in the range of 0.1 to >1 mg/L. It was demonstrated that secondary treatment stage (activated sludge, biodisc and membrane bioreactor) were efficient to remove most metals (removal rate > 70%), with the exception of B, Li, Rb, Mo, Co, As, Sb and V due to their low adsorption capacities. With the tested tertiary stages (polishing pond, rapid chemical settler, ozonation), a removal efficiency was obtained for Ti, Cr, Cd, Cu, Zn, Sn, Pb, Fe, Ag and Al, whereas a little removal (<30%) was obtained for other metals.

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