scholarly journals A Small-Scale Study on Removal of Heavy Metals from Contaminated Water Using Water Hyacinth

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1802
Author(s):  
An The Huynh ◽  
Yi-Ching Chen ◽  
Bich Ngoc Thi Tran
Keyword(s):  
Heavy Metals ◽  
Water Hyacinth ◽  
Industrial Wastewater ◽  
Cadmium Concentration ◽  
Sewage Treatment ◽  
Arsenic Concentration ◽  
Field Studies ◽  
Small Scale ◽  
Lead Zinc ◽  
Water Hyacinths

The aim of this research was to determine whether water hyacinth can be used to remove heavy metals, such as cadmium, arsenic, lead, zinc, and copper, from industrial wastewater. Investigations of the pollution removal or prevention potential of aquatic macrophytes, such as heavy metal bio-indicators in aquatic habitats, can prove to be advanced field studies. Water hyacinth is one of the aquatic plant species that has been effectively utilized for the treatment of wastewater. It is extremely effective in removing stains, suspended solids, BOD, organic matter, and heavy metals. This research focused on the use of water hyacinth to treat wastewater from heavy metals. Water hyacinths can grow in sewage, absorbing and digesting contaminants and transforming sewage effluents into comparatively clean water in the process. As a result, the plants have the potential to be used as natural water purification systems at a fraction of the cost of a standard sewage treatment facility. The experiment was performed using healthy, young, and acclimatized water hyacinths. Containment water with a cadmium concentration of 0.5 mg/L, arsenic concentration of 0.5 mg/L, lead concentration of 2 mg/L, zinc concentration of 5 mg/L, and copper concentration of 5 mg/L was added to five different polyethylene pots with 100 g of water hyacinth in each pot. After 30 days, the removal efficiency for heavy metals (Cd, As, Pb, Zn, and Cu) reached 59–92%, and the results were within the permitted limits according to the National Technical Regulation on Industrial Wastewater in Vietnam. Based on this information, it is possible to deduce that water hyacinth can be utilized to remove cadmium, arsenic, lead, zinc, and copper from industrial wastewater effluents efficiently.

scholarly journals Removal of Lead(II) and Zinc(II) from Aqueous Solutions Applying Fibber Hemp (Cannabis sativa L.)

2021 ◽  
Vol 28 (2) ◽  
pp. 229-239
Author(s):  
Dainius Paliulis
Keyword(s):  
Heavy Metals ◽  
Cannabis Sativa ◽  
Chemical Elements ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Polluted Water ◽  
Small Scale ◽  
Zinc Ions ◽  
Lead And Zinc

Abstract Lead and zinc are heavy metals with toxic properties. These chemical elements are found in wastewater. The article deals with the removal of lead(II) and zinc(II) ions from polluted water using adsorption. As object of researches was selected natural polymer - fibber hemp (Cannabis sativa L.). Big quantities of fibber hemp are produced as waste in textile, agricultural industry, and therefore their usage could help to solve two problems -reducing quantity of fibber hemp as waste and reducing of water pollution by heavy metals. Pb(II) and Zn(II) ions adsorption with fibber hemp was investigated for contact time, pH, and heavy metal ions concentration impact. Pb(II) and Zn(II) ions biosorption rate was highest within the first hour, with optimal their biosorption recorded at pH = 5.0. Highest lead and zinc ions removal efficiency was recorded after 240-480 min and reached 60.5 and 61.7 % respectively. This study demonstrated the applicability and effectiveness of fibber hemp in lead and zinc ions removal, which could be applied for the sewage treatment plant in small scale.

scholarly journals Phytoremediation potential of Typha latifolia and water hyacinth for removal of heavy metals from industrial wastewater

2021 ◽  
Author(s):  
CI Chemistry International
Keyword(s):  
Heavy Metals ◽  
Electrical Conductivity ◽  
Wastewater Treatment ◽  
Comparative Study ◽  
Water Hyacinth ◽  
Industrial Wastewater ◽  
Typha Latifolia ◽  
Experimental Period ◽  
Removal Of Heavy Metals ◽  
Percentage Removal

This study demonstrates the phytoremediation prospective of Typha latifolia (TL) and water Hyacinth (WH) in industrial wastewater treatment. A comparative study was done to evaluate the percentage removal of turbidity (Tu), electrical conductivity (EC), color (Col), iron (Fe), copper (Cu) and zinc (Zn) from industrial wastewater by using Typha latifolia and water Hyacinth with respect to uptake time and with different concentrations of industrial wastewater. The experimental results showed that Typha latifolia has performed extremely well in removing the 90.03% Tu, 82.31% EC, 95.98% Col, 92.01% Fe, 87.78% Cu and 75.81% Zn from 20% industrial wastewater during 16 days of experimental period. Results also showed that the maximum percentage removal of selected heavy metals by Typha latifolia follow the order Fe > Cu > Zn from 20 % industrial wastewater at 16-day experiment. Water Hyacinth showed best result for removing 64.15% Tu, 62.19% EC, 50.29% Col, 54.15% Fe and 70.17% Cu from 15% industrial wastewater during 12 days experiment but it has performed extremely well in removing the 85.97% Zn from 20% industrial wastewater after 16 days of experimental period.

Remediating Lead, Zinc, Cadmium and Arsenic Contaminated Steel Smelting Site with Hydrochloric Acid and Sodium Hydroxide

2011 ◽  
Vol 137 ◽  
pp. 322-327
Author(s):  
Yan Mei Li ◽  
Mei Lei ◽  
Tong Bin Chen
Keyword(s):  
Hydrochloric Acid ◽  
Sodium Hydroxide ◽  
Cadmium Concentration ◽  
Arsenic Concentration ◽  
Soil Washing ◽  
Steel Smelting ◽  
Soil Arsenic ◽  
Zinc Cadmium ◽  
Lead Zinc ◽  
Soil Cadmium

A-two step soil washing experiment was conducted to search an effective washing technique for the remediation of the contaminated soil from a steel smelting site. Our results indicated that 0.5M of hydrochloric acid alone could reduce soil cadmium concentration to lower than 1 mg kg-1, 1M of hydrochloric acid alone could reduce soil lead concentration to lower than 140 mg kg-1, 2M of hydrochloric acid combined with 0.2M of sodium hydroxide could reduce soil zinc concentration to lower than 200 mg kg-1 and reduce soil arsenic concentration to lower than 20 mg kg-1, the washed soil could be safely reused according to the national exhibition land quality standards of grade A.

scholarly journals Assessment of heavy metals in modern bottom sediments on the Karadag seashore

2020 ◽  
Vol 169 ◽  
pp. 01010
Author(s):  
Anna Drygval ◽  
Polina Drygval ◽  
Elena Stanis ◽  
Vladimir Maltsev
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Quantitative Assessment ◽  
Nature Reserve ◽  
Arsenic Concentration ◽  
Field Studies ◽  
Water Area ◽  
Nickel Lead ◽  
Concentration Limits ◽  
Geochemical Assessment

The work presents the results of quantitative assessment of heavy metals (HM) content in bottom sediments of the coastal zone near the Karadag nature Reserve. The data were obtained as a result of field studies in 2016-2018. Estimated СС and Cо coefficients and Zc were calculated. It was shown that arsenic concentration limits were exceeded everywhere in the samples. The nickel, lead, copper and zinc limits were found to have been exceeded in some locations. Ecological and geochemical assessment of water and bottom sediments quality in the section of Karadag water area has been made.

scholarly journals INFLUENCE OF METEOROLOGICAL PARAMETERS ON THE CONCENTRATION OF HEAVY METALS AND ETIOLOGICAL AGENTS IN SEWAGE SLUDGE SAMPLES AS A TOOL FOR THEIR USE IN AGRICULTURE

2020 ◽  
Vol 17 (34) ◽  
pp. 147-163
Author(s):  
Jemima Gonçalves Pinto FONSECA ◽  
Lucas Prudêncio EITERER ◽  
Marcelo Henrique OTENIO ◽  
Leônidas Paixão PASSOS ◽  
Júlio César José SILVA
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Meteorological Parameters ◽  
Sewage Treatment ◽  
Etiologic Agents ◽  
Lead And Zinc ◽  
Thermotolerant Coliforms ◽  
Lead Zinc ◽  
Etiological Agents ◽  
Copper Lead

The influence of temperature and rainfall on nutrient levels, heavy metals, and etiologic agents in sludge samples collected at the Sewage Treatment Station of Juiz de Fora, Minas Gerais, Brazil, was verified over 24 months. The results showed high levels of nitrogen (4.7-5.2%), phosphorus (1.4-2.2%), potassium (0.076-0.106%), magnesium (0.113-0.386%), iron 5.03%) and zinc (38.2-6902.1 mg Kg-1). For most of the investigated samples, the concentration of zinc was above the maximum allowed value (2,800 mg Kg-1). The concentrations of arsenic, cadmium, chrome, copper, and lead were below the maximum values allowed by the legislation. Parasitological analyzes identified thermotolerant coliforms (0.49-160 NMP g-1) and helminth eggs (1 egg), however, in amounts less than allowed by legislation. These results are indicative of the efficiency of the sewage treatment process. The results showed a significant influence of the meteorological parameters on the concentrations of nitrogen, copper, lead, zinc and pathogens in the sludge. The results also showed a strong correlation between the concentrations of copper, lead and zinc indicating that the presence of these elements in the sewage sludge has a common origin. The results demonstrated the feasibility of using the investigated matrix as fertilizer when collected in rainy periods when it favors the dilution of the elements present in their soluble forms.

scholarly journals THE CURRENT SITUATION OF HEAVY METALS AND PLANT PROTECTION CHEMICALS IN CHEESE IN HO CHI MINH CITY 2020

2020 ◽  
Vol 62 (1) ◽  
Author(s):  
Văn Chuyên Nguyễn ◽  
Thị Diệu Hằng Đinh ◽  
Văn Kha Trần
Keyword(s):  
Heavy Metals ◽  
Mercury Concentration ◽  
Lead Concentration ◽  
Plant Protection ◽  
Cadmium Concentration ◽  
Arsenic Concentration ◽  
Ho Chi Minh City ◽  
Domestic Product ◽  
Contamination Level ◽  
Domestic Products

Objectives: To determine the level of contamination of heavy metals and plant protection chemicals in cheese in Ho Chi Minh City, 2020. Subjects and methods: Select 60 most popular commercial cheese products in the study area (based on data reported by the City Food Safety Bureau). In which, 30 domestic products and 30 imported products. Evaluate the contamination level of some chemical parameters. Results and Conclusion: Lead concentration was 0.011 ± 0.007 mg / kg, arsenic concentration was 0.237 ± 0.181 mg / kg, cadmium concentration is 0.481 ± 0.371 mg / kg, Mercury concentration is 0.017 ± 0.018 mg / kg for domestic products. Lead concentration was 0.005 ± 0.007 mg / kg, Arsenic concentration was 0.099 ± 0.14 mg / kg, Cadmium concentration was 0.380 ± 0.358 mg / kg, Mercury concentration is 0.019 ± 0.018 mg / kg for the imported product. Lead concentration exceeded the permitted limit in 2/30 domestic product samples and 1/30 imported samples. Arsenic concentration exceeded the permitted limit in 1/30 of the domestic product sample. Cadmium concentration exceeded the permitted limit in 2/30 domestic product samples. Mercury concentration did not exceed the limit on all tested samples. Carbaryl concentration in domestic product samples was 25.52 ± 16.17 μg / kg, in imported product samples was 12.67 ± 14.26 μg / kg; Endosulfan concentration in domestic product samples was 4,301 ± 2,878 μg / kg, in imported products was 3.18 ± 3.40 μg / kg; Aldrin and Dieldrin concentrations in domestic product samples were 3.47 ± 2.07, in imported products was 1.94 ± 2.13 μg / kg. No sample contains plant protection chemical with concentration exceeded allowed limit for both domestic and imported products.

Effect of Wastewater on the Soil and Irrigation Process: A Laboratory Study

2017 ◽  
Vol 1 (1) ◽  
pp. 46-55 ◽  
Author(s):  
Athar Hussain ◽  
Manjeeta Priyadarshi ◽  
Saif Said ◽  
Suraj Negi
Keyword(s):  
Heavy Metals ◽  
Tap Water ◽  
Sewage Treatment ◽  
Daily Intake ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Surface Water Resources ◽  
Industrial Sewage ◽  
Concentration Levels

Most of the industrial sewage effluents used for irrigation contains heavy metals which cause toxicity to crop plants as the soils are able to accumulate heavy metal for many years. The vegetables grown for the present study were irrigated with treated wastewater brought from a nearby full-scale sewage treatment plant at different compositions along with tap water as a control. The concentration levels of the Cd, Co, Cu, Mn and Zn in the soil were found to below the toxic limits as prescribed in literature. Daily Intake Metals (DIM) values suggest that the consumption of plants grown in treated wastewater and tap water is nearly free of risks, as the dietary intake limits of Cu, Fe, Zn and Mn. The Enrichment Factor for the treated wastewater irrigated soil was found in order Zn> Ni> Pb> Cr> Cu> Co> Mn> Cd. Thus, treated wastewater can be effectively used for irrigation. This will have twofold significant environmental advantages: (1) helpful to reduce the groundwater usage for irrigation and (2) helpful to reduce the stress on surface water resources.

Conditioning of oily sludges with municipal solid wastes incinerator fly ash

1997 ◽  
Vol 35 (8) ◽  
pp. 231-238 ◽  
Author(s):  
Tay Joo Hwa ◽  
S. Jeyaseelan
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Specific Resistance ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Solid Wastes ◽  
Municipal Solid Wastes ◽  
Capillary Suction ◽  
Optimum Dosage

Conditioning of sludges improves dewatering characteristics and reduces the quantity of sludge to be handled. Anaerobic digested sludge collected from a sewage treatment plant contained 1.8% to 8% oil. The increase of specific resistance and capillary suction time (CST) with increasing oil content observed in these samples indicates the interference of oil in dewatering. It has been found that addition of municipal solid wastes incinerator fly ash decreases the specific resistances and capillary suction times of oily sludges rapidly up to 3% dosage. Beyond 3% fly ash, the decrease is less significant and the solids content in the sludge cake increases. This optimum dosage remains the same for sludges with varying oil contents from 1.8% to 12%. The total suspended solids of filtrate decreases with fly ash dosage but the toxic concentrations of heavy metals increases considerably. However at the optimum dosage of 3%, concentrations of heavy metals are within the limits for discharging into the sewers. The correlations of CST with the dewatering characteristics such as specific resistance, filter yield and corrected filter yield are established. These correlations can be used to obtain a quick prediction on dewaterability.

Pollution retention capabilities of roadside soils

1999 ◽  
Vol 39 (2) ◽  
pp. 201-208 ◽  
Author(s):  
C. Dierkes ◽  
W. F. Geiger
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Drinking Water ◽  
Groundwater Recharge ◽  
Drinking Water Quality ◽  
Traffic Density ◽  
Roadside Soils ◽  
Highway Runoff ◽  
Lead And Cadmium ◽  
Lead Zinc

Runoff from highways contains significant loads of heavy metals and hydrocarbons. According to German regulations, it should be infiltrated over embankments to support groundwater-recharge. To investigate the decontaminating effect of greened embankments, soil-monoliths from highways with high traffic densities were taken. Soils were analyzed to characterize the contamination in relation to distance and depth for lead, zinc, copper, cadmium, PAH and MOTH. Lysimeters were charged in the field and laboratory with highway runoff to study the effluents under defined conditions. Concentrations of pollutants in roadside soils depend on the age of embankments and traffic density. Highest concentrations were found in the upper 5 cm of the soil and within a distance of up to two metres from the street. Concentrations of most pollutants decreased rapidly with depth and distance. Lead and cadmium could not be detected in lysimeter effluent. Zinc and copper were found in concentrations that did not exceed drinking water quality limits.

Treatment of Rural Domestic Sewage by Solar Ozonic Ecological Sewage Treatment Plant

2014 ◽  
Vol 955-959 ◽  
pp. 3393-3399 ◽  
Author(s):  
Wei Zheng ◽  
Yan Ming Yang ◽  
Yun Long Li ◽  
Jian Qiu Zheng
Keyword(s):  
Municipal Wastewater ◽  
Operating Cost ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Domestic Sewage ◽  
Design Parameters ◽  
Small Scale ◽  
Municipal Wastewater Treatment ◽  
Average Percentage

The process technique and design parameters of project of Solar Ozonic Ecological Sewage Treatment Plant (short for SOESTP) which consists of anaerobic reactor, horizontal subsurface flow (HSSF) constructed wetlands(CWs) and the combination of solar power and ozone disinfection are described, the paper further examines the removal efficiency for treating rural domestic sewage, running expense and recycling ability of product water. The results show that the average percentage removal values of CODcr，BOD5，SS，TN，NH3-N，TP range from 95.6% to 98.0%, 96.0% to 98.7%, 93.1% to 96.1%, 97.0% to 98.9%, 96.9% to 99.5%, 98.2% to 99.6%, respectively, the reduction of fecal coliform (FC) reaches 99.9%, the effluent quality meets the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant（GB18918-2002）. The running cost of SOESTP is 0.063yuan/ m3, saves much more than traditional sewage treatment, and the ozone water obtained from the reservoir will be an ideal choice for disinfection .The system has characteristics of easy manipulation, low operating cost, achieving advanced water, energy conservation and environment protection, is thought to be very suitable for use as the promotion of rural small - scale sewage treatment.

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