PATSANI GREGORY KUMAMBALA

Dr. PATSANI GREGORY KUMAMBALA

orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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29 September 2022 in Agronomy
Verified
Journal Article
Open access
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AMAngstone Thembachako Mlangeni
Angstone Thembachako Mlangeni
ARAndrea Raab
Andrea Raab
PKPATSANI GREGORY KUMAMBALA
PATSANI GREGORY KUMAMBALA
MMMaurice Monjerezi
Maurice Monjerezi
LMLimbikani Matumba
Limbikani Matumba
JFJoerg Feldmann
Joerg Feldmann
The aim of this study was to obtain baseline data for heavy metal(loids) concentrations of rice paddy fields to evaluate the impacts of soil metal(loids) concentrations on quality of rice, and to identify sources of metal(loids) pollution of paddy fields in Malawi. In total, 66 soil samples were collected from 22 different smallholder rice farmers’ paddy fields (sites) in Malawi. Concentrations of metal(loids) (arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), manganese (Mn), lead (Pb), uranium (U), and gallium (Ga)) were measured using inductively coupled plasma mass spectrometry (ICP-MS) after acid block digestion with a mixture of concentrated nitric acid (70% HNO3) and hydrogen peroxide (30% H2O2). Measured soil metal(loids) concentrations were compared with Soil UK CLEA soil metal(loids) guidelines, maximum allowable limits (MAL) recommended by the World Health Organization (WHO), the Chinese Environmental Quality Standards (CEQS) for soil metal(loids) concentrations in agricultural soils, and the normally reported soil metal(loids) concentrations in agricultural fields worldwide. Results indicated that mean soil As (2.2 mg As kg−1), Cd (0.044 mg Cd kg−1), Pb (11 mg Pb kg−1), Co (14 ± 6 mg Co kg−1), Mn (601 mg Mn kg−1), U (2.02 mg U kg−1), and Ga (24 mg Ga kg−1) concentrations were at least three times lower than the respective guidelines and MAL recommended by WHO, UK CLEA, and CEQS (20 mg As kg−1, 0.3 mg Cd kg−1, 32 mg Pb kg−1, 50 mg Co kg−1, and 2000 mg Mn kg−1). The values obtained in this study were also within the normally reported metal(loid) concentrations for unpolluted agricultural soils worldwide. However, the mean Cr concentration (78.0 mg Cr kg−1) obtained in this study was higher than that reported for agricultural soils in China (27 ± 5 mg Cr kg−1; range: 22–39 mg Cr kg−1) but was within the normally reported Cr concentrations (1–100 mg Cr kg−1) for unpolluted soils. These findings suggest that metal(loids) concentrations of Malawian rice paddies pose no threat to production to elevated metal(loids) accumulation in rice, and that rice paddies should be safeguarded from contamination. However, further research is required to investigate the impacts of factors such as source of irrigation of water, water management regimes, soil cation exchange capacity, organic manure/composts amendments, and the application of inorganic fertilizers on uptake, transfer, and translocation of soil metal(loids) to various parts of rice plants, even when the soil metal(loids) concentrations are low.

2 October 2024 in Physics and Chemistry of the Earth, Parts A/B/C
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Journal Article
Closed access
PKPATSANI GREGORY KUMAMBALA
PATSANI GREGORY KUMAMBALA
LKLenard Kumwenda
Lenard Kumwenda
ECEvance Chaima
Evance Chaima
SKSheila Kavwenje
Sheila Kavwenje
AMAngston Mlangeni
Angston Mlangeni

9 January 2026 in Physics and Chemistry of the Earth, Parts A/B/C
Verified
Journal Article
Closed access
PKPATSANI GREGORY KUMAMBALA
PATSANI GREGORY KUMAMBALA
LKLenard Kumwenda
Lenard Kumwenda
DMDeogratias M.M. Mulungu
Deogratias M.M. Mulungu
SKSheila Kavwenje
Sheila Kavwenje

17 April 2026 in Agricultural Water Management
Verified
Journal Article
Open access
GCGrivin Chipula
Grivin Chipula
DSDaniel Sambakunsi
Daniel Sambakunsi
JCJonathan T. Chikankheni
Jonathan T. Chikankheni
LFLameck FIWA
Lameck FIWA
CKClifton Kawanga
Clifton Kawanga
PKPATSANI GREGORY KUMAMBALA
PATSANI GREGORY KUMAMBALA

20 December 2025 in Scientific African
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Journal Article
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ACAlfonso Chikuni
Alfonso Chikuni
PKPATSANI GREGORY KUMAMBALA
PATSANI GREGORY KUMAMBALA
MCMichael Chasukwa
Michael Chasukwa
BCBlessings Chinsinga
Blessings Chinsinga

3 September 2025 in World Development Sustainability
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Journal Article
Open access
PKPATSANI GREGORY KUMAMBALA
PATSANI GREGORY KUMAMBALA
GCGrivin Chipula
Grivin Chipula
NMNema Matekenya
Nema Matekenya
ECEvance Chaima
Evance Chaima
SKSheila Kavwenje
Sheila Kavwenje
CMChikondi Makwiza
Chikondi Makwiza