Heavy Metals and Physicochemical Properties of Soils in Kano Urban Agricultural Lands

The quality of soils in rehabilitated small-scale mined sites needs thorough investigation since a lot of changes do occur. The study assessed the impacts of small-scale mining activities on concentration and distribution of soil physicochemical properties and heavy metals. The soil samples were collected from 120 (50 m × 50 m) plots. The concentrations of soil physicochemical properties (Ca, Mg, Na, N, P, K, and OC and EC) varied significantly ( p < 0.05) between unmined and mined soils. However, there were no statistically, significant differences ( p < 0.05) observed in the concentrations of Cd, Hg, Pb, As, and Cu between the unmined and mined soils. Despite the generally poor (33.8%) soil quality in the study area, mining activities further reduced it by 24.2%. Soils from mined sites with unfilled/partially filled pits had higher levels of K, Mg, and Na. As mined sites fallow period increased, concentrations of OC and Cd increased, while Ca, Mg, pH, Cu, Pb, and As and value of EC decreased. The number of years that mined land remained fallow, and whether the pits were filled or unfilled during this period should be factored into the mined land rehabilitation processes.

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Soil quality of the tea and apple-growing sites in Mindat District, Chin state, Myanmar: A preliminary study

Zemljiste i biljka ◽

10.5937/zembilj2101027k ◽

2021 ◽

Vol 70 (1) ◽

pp. 27-40

Author(s):

Yaung Kwee ◽

Khin Soe

Keyword(s):

Physicochemical Properties ◽

Silty Clay ◽

Subtropical Climate ◽

Clay Loam ◽

Silty Clay Loam ◽

Preliminary Study ◽

Phosphorus And Potassium ◽

Very High ◽

Physicochemical Properties Of Soils

In this study, two sites from tea and apple growing sites were collected from Pyay village and Nine Mile village, Mindat district, Chin state of West Myanmar under a humid subtropical climate. The results of physicochemical properties of observed soils were neutral pH, favorable moisture, silty clay loam texture, very high content of organic carbon, organic matter and total nitrogen. However, the tea growing soil was very poor in phosphorus and potassium content. Moreover, both soils lack of available potassium. The content of heavy metals in both soils was not varied from each other and followed the order: Fe (iron) > Cu (copper) >Zn (zinc) > Pb (lead) > Cr (chromium) and was below the maximum allowed concentrations (MAC). Therefore, the studied soils are generally favorable for cultivation under the condition of application of phosphorus and potassium fertilizers. However, due to the regular application of fertilizers and pesticides, it is necessary to monitor these soils for PTE levels. Further research is recommended, which must include analyses of the physicochemical properties of soils to a two depths of 0-30 and 30-60 cm, especially for the area where fruit plants are grown. In addition, higher density of soil samples and sub-samples are necessary to produce a reliable dataset that will allow proper statistical analysis.

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Investigation of Some Qualitative Characteristics of Sludge Produced in Hamadan Wastewater Treatment Plant and Its Application in Agricultural Lands

Avicenna Journal of Environmental Health Engineering ◽

10.34172/ajehe.2019.01 ◽

2019 ◽

Vol 6 (1) ◽

pp. 1-7

Author(s):

Reza Shokoohi ◽

Samira Moradi ◽

Zhila Ghavami ◽

Azam Nadali ◽

Raheleh Amiri

Keyword(s):

Heavy Metals ◽

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Environmental Protection Agency ◽

Treatment Plant ◽

The United States ◽

Average Concentration ◽

Agricultural Lands ◽

Secondary Sludge ◽

Qualitative Characteristics

In this study, qualitative characteristics of the sludge produced in Hamadan wastewater treatment plant and the feasibility of its application in agricultural lands were investigated. Samples were taken from the primary and secondary sludge and indices such as VS/TS, PH, TKN, COD, TKN, SOUR, Na, Ca, SAR, heavy metals and biological properties (the mean fecal coliform count and the number of parasitic eggs) were measured. The results were compared with the United States Environmental Protection Agency (US EPA) standards (40 FCR-503). The results showed that the VS/TS ratio of the raw sludge was 0.8, 0.55, and 0.55 and that of the secondary sludge was 0.65, 0.28, and 0.32 for fall, winter, and summer, respectively. The average concentration of COD, TKN, SOUR, Na, and Ca for the initial sludge was 51283, 107, 0.50, 609, and 952 and for secondary sludge, it was 35595, 81, 4.90, 306, and 493 mg/L, respectively. The MPN for primary and secondary sludge was determined to be 19.83 × 106 and 186 × 106 , respectively and the average number of parasite eggs in primary and secondary sludge was 7.05 and 7.2 in 4 g of dry solids. Entamoeba coli had the highest number of parasite. The results of this study showed that the highest concentration of heavy metals in the sludge was 21396 mg/kg. The values obtained for the above-mentioned indices and heavy metals were in standards range. The results of this study show that none of the primary and secondary sludge samples has been properly stabilized. The values obtained for biological characteristics of sludge were not in the standard range. Therefore, it was revealed that the use of sludge for agriculture needed more stabilization.

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Assessment of Physicochemical Properties and Heavy Metal Load in Soils of Ebocha Gas Flaring Site in Rivers State, Nigeria

Asian Soil Research Journal ◽

10.9734/asrj/2020/v4i230087 ◽

2020 ◽

pp. 1-9

Author(s):

O. I. Achieche ◽

O. O. Njoku ◽

C. M. Duru ◽

M. O. Nwachukwu

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Physicochemical Properties ◽

Negative Impact ◽

Soil Depth ◽

Calcium Content ◽

Gas Flaring ◽

Metal Load ◽

Acidic Nature ◽

Rivers State

The negative impact of gas flaring on the environment cannot be overemphasised. This study assessed the effect of gas flaring on the physicochemical properties and heavy metal contents in soils of Ebocha gas flaring site in Rivers State. It involved the assessment of various distances from gas flaring point to 200 meters away (50 m, 100 m, 150 m, and 200 m) which represents the extent of gas flared pollution on soils to determine the physicochemical properties and heavy metal load. The gas flaring significantly decreased soil organic carbon and calcium content when compared with non-gas flaring polluted soils. Soil acidity increased, soil exchangeable ions decreased. N, P and K were altered in gas flared soils when compared to the controls. There were detrimental effects on soils physicochemical properties. Heavy metals observed were Cd (Cadmium), Ni (Nickel), As (Arsenic), Cr (Chromium), while Pb (Lead) was not detected. The concentration of heavy metals in gas flared soils decreases down soil depth from 0-15 cm to 45-60 cm respectively. The gas flaring extremely caused the acidic nature of gas flared soils. Coefficient of variation (CV) in percentage shows significant increase in acidic nature of the gas flared soils when compared with the control soils.

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Assessment of some heavy metals and physicochemical properties in surface soils of municipal open waste dumpsite in Yenagoa, Nigeria

African Journal of Environmental Science and Technology ◽

10.5897/ajest2013.1621 ◽

2014 ◽

Vol 8 (1) ◽

pp. 41-47 ◽

Cited By ~ 10

Author(s):

AMOS TAUTUA ◽

Martin W. Bamidele ◽

Adebayo O. ONIGBINDE, ◽

Diepreye ERE,

Keyword(s):

Heavy Metals ◽

Physicochemical Properties ◽

Surface Soils

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Understanding Nanoparticle Toxicity to Direct a Safe-by-Design Approach in Cancer Nanomedicine

Nanomaterials ◽

10.3390/nano10112186 ◽

2020 ◽

Vol 10 (11) ◽

pp. 2186 ◽

Cited By ~ 2

Author(s):

Jossana A. Damasco ◽

Saisree Ravi ◽

Joy D. Perez ◽

Daniel E. Hagaman ◽

Marites P. Melancon

Keyword(s):

Heavy Metals ◽

Physicochemical Properties ◽

Tumor Targeting ◽

Rational Design ◽

Inorganic Materials ◽

Cancer Therapies ◽

Inorganic Nanoparticle ◽

Treatment And Prevention ◽

Cancer Nanomedicine ◽

Safe By Design

Nanomedicine is a rapidly growing field that uses nanomaterials for the diagnosis, treatment and prevention of various diseases, including cancer. Various biocompatible nanoplatforms with diversified capabilities for tumor targeting, imaging, and therapy have materialized to yield individualized therapy. However, due to their unique properties brought about by their small size, safety concerns have emerged as their physicochemical properties can lead to altered pharmacokinetics, with the potential to cross biological barriers. In addition, the intrinsic toxicity of some of the inorganic materials (i.e., heavy metals) and their ability to accumulate and persist in the human body has been a challenge to their translation. Successful clinical translation of these nanoparticles is heavily dependent on their stability, circulation time, access and bioavailability to disease sites, and their safety profile. This review covers preclinical and clinical inorganic-nanoparticle based nanomaterial utilized for cancer imaging and therapeutics. A special emphasis is put on the rational design to develop non-toxic/safe inorganic nanoparticle constructs to increase their viability as translatable nanomedicine for cancer therapies.

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