Soil washing by biodegradable GLDA and PASP: Effects on metals removal efficiency, distribution, leachability, bioaccessibility, environmental risk and soil properties

2022 ◽  
Vol 158 ◽  
pp. 172-180
Author(s):  
Junyuan Guo ◽  
Chongrui Yuan ◽  
Ziyu Zhao ◽  
Qianlan He ◽  
Hengbing Zhou ◽  
...  
Keyword(s):  
Soil Properties ◽  
Removal Efficiency ◽  
Environmental Risk ◽  
Soil Washing ◽  
Metals Removal

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

Metal Removal Efficiency in Deep Submicron Trenches by Wet Chemicals

2014 ◽  
Vol 219 ◽  
pp. 32-35
Author(s):  
Philippe Garnier ◽  
Nathalie Drogue ◽  
Romain Duru
Keyword(s):  
Integrated Circuits ◽  
Removal Efficiency ◽  
Metal Contamination ◽  
Metal Removal ◽  
Deep Submicron ◽  
Metals Removal ◽  
Silicon Trenches

Metal contamination impact on transistors’ degradation has been widely studied. Nonetheless, most of the work has been performed on blanket wafers, or based on punctual yield crisis during the integrated circuits’ manufacturing. This paper proposes a comparison of the contamination and metals removal efficiency between blanket wafers and inside deep silicon trenches.

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.

scholarly journals Novel and Eco-Friendly Washing Agents to Remove Heavy Metals from Soil by Soil Washing

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Zygmunt Mariusz Gusiatin
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Humic Substances ◽  
Plant Extracts ◽  
Environmental Risk ◽  
Soil Washing ◽  
Field Scale ◽  
Remediation Technology ◽  
Low Weight ◽  
Negative Effect

Soil washing is a remediation technology that can efficiently remove heavy metals from soil and decrease environmental risk. Due to the negative effect of conventional washing agents on soil quality, their replacement with novel, eco-friendly agents is necessary. This paper gives a basic presentation of the most promising washing agents that have high potential to be used at field scale: biodegradable chelators, biosurfactants, plant extracts, and dissolved organic matter including soluble low-weight organic matter and soluble humic substances. The main advantages of these novel agents are highlighted

scholarly journals OPTIMIZATION OF EDTA ENHANCED SOIL WASHING ON MULTIPLE HEAVY METALS REMOVAL USING RESPONSE SURFACE METHODOLOGY

2018 ◽  
Vol 26 (4) ◽  
pp. 241-250 ◽  
Author(s):  
Liwei He ◽  
Bin Li ◽  
Ping Ning ◽  
Xiao Gong
Keyword(s):  
Heavy Metals ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Regression Models ◽  
Ethylenediaminetetraacetic Acid ◽  
Soil Washing ◽  
Liquid Ratio ◽  
Metals Removal ◽  
Edta Concentration ◽  
Multiple Heavy Metals

This research presents the optimization of soil washing conditions in the removal of multiple heavy metals (Cu-Pb-Zn-Cd) under the using of ethylenediaminetetraacetic acid (EDTA). The optimum combination of washing parameters in a bench-scale soil washing experiments is determined by response surface methodology (RSM). Central composite design is applied after single factor experiment, EDTA concentration, solid-to-liquid ratio and washing time are evaluated variables for the removal processes, and the regression models of HMs are constructed. The results show that, EDTA concentration and solid-to-liquid ratio are significant factors for this process. Subsequently, 50% of Cu removal was set as the optimum target to optimize the combined conditions, through the building of multiple quadratic regression models, the optimal condition combination is determined that EDTA concentration is 0.0026 mol·L-1, solid-to-liquid ratio is 1:22, washing time is 3.89 h, the extraction rate of Pb, Zn, Cd is predicted to be 78%, 75% and 71%, respectively.

Nutrient Removal in a Reed Bed System

1991 ◽  
Vol 23 (4-6) ◽  
pp. 729-737 ◽  
Author(s):  
R. Haberl ◽  
R. Perfler
Keyword(s):  
Plant Physiology ◽  
Soil Properties ◽  
Nutrient Uptake ◽  
Removal Efficiency ◽  
Nutrient Removal ◽  
Loamy Soil ◽  
Reed Bed

Since 1984 investigations concerning sewage technology, plant physiology and soil properties have been carried out on the reed bed system at Mannersdorf/Leithagebirge (local loamy soil, Phragmites, planted area 3×150 m2, influent 30 - 50 mm/d). The removal efficiency of COD and BOD5 amounts to 80-90 % and 90 - 98 %, respectively. Elimination of nutrients (NTOT and PTOT) varies from 3 0 to 60 %, in general. Total nitrification cannot be reported for any of the plots fed with different sewage qualities. Nutrient uptake of NTOT and PTOT by Phragmites a. reaches 30 or 15 % of influent sewage load during July and August but is of no importance with respect to the average of the year. The proportion of PTOT in the soil is still increasing every year and now amounts to about 450 mg/100g soil. The concentration of phosphorus essentially stagnates at the level of 50 mg/100g soil.

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