scholarly journals Drinking water treatment residuals as an amendment to alkaline soils: Effects on bioaccumulation of heavy metals and aluminum in corn plants

2008 ◽  
Vol 54 (No. 6) ◽  
pp. 234-246 ◽  
Author(s):  
A.M. Mahdy ◽  
E.A. Elkhatib ◽  
N.O. Fathi
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Treatment ◽  
Significant Relationship ◽  
Agricultural Soils ◽  
Drinking Water Treatment ◽  
Land Application ◽  
Alkaline Soils ◽  
Corn Plants ◽  
Extractable Al

An alum-based drinking water treatment residue (DWTR) is the by-product from the production of potable water. Land application of DWTR has received a considerable attention for its potential as a low-cost disposal alternative. A greenhouse experiment was conducted to quantify the effects of DWTR on bioaccumulation of some heavy metals in plant tissue and to determine the effects of the DWTR on soil aluminum and aluminum phytotoxicity for the corn plants in alkaline soils. The results indicated that land application of DWTR significantly decreased extractable heavy metals in all studied soils. Combined analyses of all soils and rates of DWTR application showed significant relationship between DTPA-extractable heavy metals and heavy metals uptake of corn plants. Addition of DWTR with different rates (10, 20, 30 and 40 g/kg) to different soil types did not cause aluminum phytotoxicity symptoms for corn plants grown in all studied alkaline agricultural soils because the application rates of DWTR did not increase extractable Al in amended soils > 8 mg Al/kg and the Al phytotoxicity may occur below pH 5.5. Extractable Al is associated with pH of the studied soils, combined analyses of all soils and rates of DWTR application showed a significant relationship between extractable Al and pH. Based on the results of current study, the DWTR is considered an ameliorating material for heavy metals removal from soils; however, additional studies are necessary to confirm these results under field conditions.

The Use of Aluminosilicate Sorbent for the Purification of Natural Waters from Heavy Metals

2020 ◽  
Vol 24 (3) ◽  
pp. 19-23 ◽  
Author(s):  
A.S. Kutergin ◽  
T.A. Nedobukh
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Treatment ◽  
Mechanical Strength ◽  
Natural Waters ◽  
Drinking Water Treatment ◽  
Exchange Capacity ◽  
Filtration Process ◽  
Treated Water ◽  
Dynamic Exchange

The possibilities of using natural granular glauconite in standard water treatment schemes have been investigated. Resource tests of the studied material were carried out in dynamics, simulating possible conditions of use. As a result of the experiments, it was established: during the filtration process, alkalization of water occurs, but the result does not exceed pH = 6÷9, which are the norm for drinking water; the use of a sorbent based on natural glauconite does not impair the hardness indicator of the treated water. The dynamic exchange capacity was: for iron – 3.09 mg/g of absorbent, copper – 19.15 mg/g of absorbent, zinc – 4.82 mg/g of absorbent. The resource of the filter was determined with the loading of granulate with a volume of 1 dm3: for iron – 2918 dm3, for copper – 5425 dm3, for zinc – 273 dm3. The mechanical strength acquired by the sorbent as a result of granulation made it possible to wash the load by the countercurrent method, freeing intergranular pores from the sediment accumulated in them. The revealed capabilities of granular glauconite will allow its use in drinking water treatment schemes for purifying natural waters from heavy metals: iron, zinc, copper.

Heavy Metals Sorption by Drinking Water Treatment Byproducts in Jar Tests

2016 ◽  
Author(s):  
Megan L. Hart ◽  
Ryan Holmes ◽  
John T. Kevern ◽  
Alexander A. Silvius
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment

Global profile of heavy metals and semimetals adsorption using drinking water treatment residual

2019 ◽  
Vol 372 ◽  
pp. 1019-1027 ◽  
Author(s):  
Cheng Shen ◽  
Yaqian Zhao ◽  
Wenxuan Li ◽  
Yan Yang ◽  
Ranbin Liu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Global Profile ◽  
Water Treatment Residual

Immobilization of heavy metals in sediment dredged from a seaport by iron bearing materials

1998 ◽  
Vol 37 (6-7) ◽  
pp. 379-386 ◽  
Author(s):  
I. Müller ◽  
E. Pluquet
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Treatment ◽  
Red Mud ◽  
Drinking Water Treatment ◽  
Soil Extracts ◽  
Steel Shot ◽  
Pot Trials ◽  
Bearing Materials ◽  
Iron Bearing

Pot and field trials were carried out using sediment dredged from the port of Bremen (Germany) and deposited in a settling basin near Bremen; the sediment is polluted with Cd and Zn. Five iron-bearing materials were added to the soil (1% pure Fe in soil dry matter) to immobilize the heavy metals: ‘Red mud’ from the aluminium industry, sludge from drinking-water treatment, bog iron ore, unused steel shot and steel shot waste. The pH and CEC were little influenced by any of these treatments, but the NH4NO3 and DTPA extractable amounts of Cd and Zn, and particularly the uptake of Cd and Zn by plants, were markedly reduced. It was demonstrated that red mud and precipitated Fe-bearing sludge were the most effective materials. They caused an increase in the adsorption capacity of the dredged sediment with respect to Cd of about 50%. In the pot trials, NH4NO3 soluble amounts of Cd and Zn in samples of soil treated with these materials were reduced by 50% (DTPA: −20%), while the uptake by plants was reduced by 20–50%. In the field trial, Cd and Zn were immobilized in the soil to a certain extent, but less effect was observed on the concentrations in plants and soil extracts compared with the pot trials. In practice, red mud is unsuitable as it contains large amounts of Cr and Al3+ ions. Therefore, only sludge from drinking-water treatment, as long as the As concentration in it is low, remains as a useful material for immobilizing heavy metals in polluted sediment dredged from a seaport.

scholarly journals Evaluation of Point-of-Use Drinking Water Treatment Systems Efficiency in Reducing or Removing Physicochemical Parameters and Heavy Metals

2019 ◽  
Author(s):  
Raziyeh Pourjamali ◽  
Elham Khalili Sadrabad ◽  
Sayed Aliasghar Hashemi ◽  
Hosein Shekofteh ◽  
Mehdi Mokhtari ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Total Hardness ◽  
Arsenic Content ◽  
Cross Sectional ◽  
Point Of Use ◽  
Reduction Efficiency ◽  
Copper Zinc

Introduction: Nowadays, many people have bought and installed home water treatment devices (point-of-use drinking water treatment systems), as an essential measure, to improve their health. Materials and Methods: This cross-sectional study was conducted to evaluate the parameters of drinking water of Rafsanjan city and home water treatment device in summer 2017. Water samples at the inlet and outlet of the device with 15 day intervals for three months (approximately 48 samples, summer) were collected. Then, the concentration of heavy metals, total hardness, EC, sodium and nitrate were measured in inlet and outlet of treatment devices. All data were statistically analyzed by SPSS software version 18.   Results: The results showed that in the inlet water, the EC and pH values were in the standard ranges. The concentrations ​​of arsenic was higher than the permissible limits and other parameters including total hardness, calcium, sodium, magnesium, nitrate, copper, zinc and lead were lower than the standard limits. The highest reduction efficiency was obtained for copper, zinc and arsenic respectively, and the lowest reduction efficiency was reported for nitrate and calcium. Conclusion: Therefore, it can be concluded the devices could reduce the concentrations of the parameters under the standard limits. Due to the relationship between heart disease and light water, it is suggested that, in view of the high arsenic content in Rafsanjan water, filters at the inlet municipal water can be used to absorb heavy metals, especially arsenic.

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