Chromium contamination in paddy soil-rice systems and associated human health risks in Pakistan

Ali, Waqar; Zhang, Hua; Mao, Kang; Shafeeque, Muhammad; Aslam, Muhammad; Zhong, Li; Feng, Xinbin; Podgorski, Joel

doi:10.1016/j.scitotenv.2022.153910

Cited by 33 publications

(3 citation statements)

References 73 publications

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“…In China, paddy fields had a Cr concentration exceeding China’s soil environmental quality limits in up to 3.85% of their total area . Due to the active redox dynamics of paddy soils, Cr(III) is generally much more abundant than Cr(VI) in soils. − Although Cr(III) is less mobile and toxic than Cr(VI), excess Cr(III) in soil has a phytotoxic effect on crop growth, which poses a threat on food security through decreasing grain yield and quality. − The cycling of Cr(III) in the paddy soils highly affects the mobility and bioavailability of Cr in rice-soil systems as shown by the frequent reports on Cr contamination in rice grains. − However, the geochemical behavior of Cr(III) in soils with active redox dynamics remains largely unknown.…”

Section: Introductionmentioning

confidence: 99%

Organic Matter Counteracts the Enhancement of Cr(III) Extractability during the Fe(II)-Catalyzed Ferrihydrite Transformation: A Nanoscale- and Molecular-Level Investigation

Xia,

Liu,

Jin

et al. 2023

Environ. Sci. Technol.

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Section: Introductionmentioning

confidence: 99%

Organic Matter Counteracts the Enhancement of Cr(III) Extractability during the Fe(II)-Catalyzed Ferrihydrite Transformation: A Nanoscale- and Molecular-Level Investigation

Xia,

Liu,

Jin

et al. 2023

Environ. Sci. Technol.

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“…Pessimistically, Cr entering the environment cannot be biodegradable (Gong et al 2017, Xue et al 2018. Therefore, as soon as Cr pollution is formed, it will continuously endanger human health through bioaccumulation and biomagnification (Ali et al 2022. In general, Cr exists mainly in the form of Cr (III) and Cr (VI).…”

Section: Introductionmentioning

confidence: 99%

Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions.

Sun,

Wang,

Zhang

et al. 2024

Preprint

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The problem of soil and water contamination caused by Cr discharged from dyeing, electroplating and metallurgical industries has become increasingly serious, which is a potentially great threat to the environment and public health. Therefore, it is essential to develop a quick, efficient and low-cost adsorbent for the remediation of Cr-contaminated wastewater. In this work, we successfully prepared MgAl-LDH/ commercial activated carbon nanocomposites (LDH-CAC) with hydrothermal. The effects of activated carbon type and loading on LDH-CAC were investigated. Moveover, we also have examined the adsorption capacity and adsorption behavior of LDH-CAC on Cr(VI), and proposed a potential removal mechanism. Lastly, the reusability of LDH-CAC was researched. The results showed that the prepared LDH-CAC@1 had the best removal performance at the commercial activated carbon type of CAC-103 and activated carbon loading of 1.0 g. The adsorption behavior study, on the other hand, indicated that LDH-CAC @1 could reach adsorption equilibrium within 10 min with a maximum adsorption capacity of 116.7 mg/g, which was significantly better than MgAl-LDH (10.7 mg/g) and CAC (21.3 mg/g). The primary removal mechanisms included adsorption-coupled reduction, ion exchange, surface precipitation, and electrostatic attraction. Reusability experiment revealed that the removal efficiency of LDH-CAC@1 decreased by 25.1% after four cycles, which illustrated the promising reusability of LDH-CAC@1.This study provides an effective adsorbent with a remarkably fast reaction, which has positive environmental significance for the treatment of Cr (VI) wastewater.

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“…The rice husk accounts 20% of the grain weight and major source of silica and renewable energy and used as adsorbent for remediation of the heavy metals and dyes from the waste water 15,16,17 . However, these grains, straw and husk can be contaminated with toxic, heavy, radioactive, and rare earth elements 18,19,20,21,22,23,24,25 . The rice plants also uptake the minerals at the surface field soil 26 .…”

Section: Introductionmentioning

confidence: 99%

Multi-element exposure and health risks of grains from Ambagarh Chowki, Chhattisgarh, India

Wakhle,

Sharma,

Patel

et al. 2024

Preprint

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Grains of rice, wheat, and maize are staple foods widely consumed for their mineral and nutritional values. However, these cereals can accumulate toxic elements from contaminated soils, posing health risks. This study investigates the bioaccumulation patterns of 52 minerals (including nutrients, heavy metals, and rare earth elements) accumulated over range 10249 to 58414 mg kg− 1 (dw) in various parts (grain, husk, straw, root) of these cereals grown in the heavily polluted region of Ambagarh Chowki, India. The results reveal rice exhibits a higher accumulation of toxic elements compared to wheat and maize grains, with the high-yield Sarna cultivar being the most susceptible. Across the rice plant, accumulation increased in the order: grain < husk < straw < root. Elements like P, K, Cu, and Zn showed the highest enrichment. Worryingly, most toxic elements like As, Pb, and Cd exceeded permissible limits across grains, straws, and husks. Health risk assessment indicates wheat and maize pose greater non-cancer and cancer risks than rice. Despite being grown in a highly contaminated region, the study identifies some rice cultivars like Naya 1010 and Sonam as relatively safer options due to the lower accumulation of toxic elements in the grains. This comprehensive analysis provides valuable insights into cereal safety and highlights the need for monitoring polluted areas to mitigate health hazards through judicious selection of crop varieties.

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Chromium contamination in paddy soil-rice systems and associated human health risks in Pakistan

Cited by 33 publications

References 73 publications

Organic Matter Counteracts the Enhancement of Cr(III) Extractability during the Fe(II)-Catalyzed Ferrihydrite Transformation: A Nanoscale- and Molecular-Level Investigation

Organic Matter Counteracts the Enhancement of Cr(III) Extractability during the Fe(II)-Catalyzed Ferrihydrite Transformation: A Nanoscale- and Molecular-Level Investigation

Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions.

Multi-element exposure and health risks of grains from Ambagarh Chowki, Chhattisgarh, India

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