Cadmium Contamination in Water and Soil

Mahmood, Qaisar; Asif, Muhammad; Shaheen, Shahida; Hayat, Malik Tahir; Ali, Shafaqat

doi:10.1016/b978-0-12-814864-8.00006-1

Cited by 30 publications

(15 citation statements)

References 78 publications

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“…Different man-made activities with continuous effluents are considered among the main source for the contamination of aquatic ecosystems 1,2 . One of the most common constituents of these effluents the heavy metals (HMs).…”

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confidence: 99%

Modified Ziziphus spina-christi stones as green route for the removal of heavy metals

Assirey

Sirry

Burkani

et al. 2020

Sci Rep

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Green routes for remediation of heavy metals are worldwide challenges to overcome pollution problems on one hand and control the adverse impact of chemicals on the other hand. Biosorption is one of the most effective methods for removing lower level of heavy metals. The idea to apply natural resources as a green method for removal of heavy metals, this route has no adverse impacts on the environment. This study investigated the ability of chemically modified Ziziphus spina-christi stones (ZSCs) as agriculture by-products to perform the biosorption of Pb(II), Zn(II) and Cd(II) ions from wastewater in a single and ternary metal system. The characteristic functional groups of chemically modified ZSCs were analyzed by Fourier transform infrared. In comparison with acidic ZSCs, alkali-modified ZSCs by KOH was more effective and enhanced the removal efficiency of ZSCs. Using Langmuir isotherm, the maximum adsorption capacity on the modified ZSCs for Pb(II) was 9.06 mg/g, for Zn(II) obtained by using ZSC–citric acid was 4.19 mg/g and 5.38 mg/g for Cd(II) as obtained by using ZSC–H2O2. The molecular electrostatic potential, which was calculated at B3LYP/6-31G(d,p), indicated that each metal is di-hydrated, forming a complex with two units of amino acids. This mechanism demonstrated the uptake process by ZSCs.

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mentioning

confidence: 99%

Modified Ziziphus spina-christi stones as green route for the removal of heavy metals

Assirey

Sirry

Burkani

et al. 2020

Sci Rep

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“…The Cd concentration used was selected according to our previous experience (Pena et al, 2012) and corresponds to the lowest dose that caused growth differences between lines. It is a realistic concentration that can be found in soils used to cultivate edible crops (Mahmood et al, 2019) and it is also within the range commonly used to study the effect of this metal in wheat plants. To let aside cadmium effects on photosynthesis, we evaluated Cd effect on root apex before the time to which, theoretically, wheat coleoptiles sprout through the soil surface and phototrophic lifestyle begins.…”

Section: Methodsmentioning

confidence: 99%

“…Cadmium (Cd) is a nonessential element harmful to all living organisms. It is present in the environment from natural and soil anthropogenic sources (Mahmood et al, 2019). Cd uptake can occur through the entire root, but the apex zone was described as the most active region for Cd 2+ influx (Piñeros et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

An isopentenyl transferase transgenic wheat isoline exhibits less seminal root growth impairment and a differential metabolite profile under Cd stress

Mansur

Pena

Bossio³

et al. 2021

Physiologia Plantarum

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Cadmium is one of the most important contaminants and it induces severe plant growth restriction. In this study, we analyzed the metabolic changes associated with root growth restriction caused by cadmium in the early seminal root apex of wheat. Our study included two genotypes: the commercial variety ProINTA Federal (WT) and the PSARK::IPT (IPT) line which exhibit high‐grade yield performance under water deficit. Root tips of seedlings grown for 72 h without or with 10 μM CdCl2 (Cd‐WT and Cd‐IPT) were compared. Root length reduction was more severe in Cd‐WT than Cd‐IPT. Cd decreased superoxide dismutase activity in both lines and increased catalase activity only in the WT. In Cd‐IPT, ascorbate and guaiacol peroxidase activities raised compared to Cd‐WT. The hormonal homeostasis was altered by the metal, with significant decreases in abscisic acid, jasmonic acid, 12‐oxophytodienoic acid, gibberellins GA20, and GA7 levels. Increases in flavonoids and phenylamides were also found. Root growth impairment was not associated with a decrease in expansin (EXP) transcripts. On the contrary, TaEXPB8 expression increased in the WT treated by Cd. Our findings suggest that the line expressing the PSARK::IPT construction increased the homeostatic range to cope with Cd stress, which is visible by a lesser reduction of the root elongation compared to WT plants. The decline of root growth produced by Cd was associated with hormonal imbalance at the root apex level. We hypothesize that activation of phenolic secondary metabolism could enhance antioxidant defenses and contribute to cell wall reinforcement to deal with Cd toxicity.

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“…The massive accumulation of Cd in the environment is hazardous for organisms, especially in the case of chronic exposure. Inhalation and ingestion of any remarkable amount of Cd lead to respiratory tract infections and may also cause liver and kidney poisoning (Mahmood et al 2019). Although the accumulation of Cd in the environment can cause toxicity, it is still widely used in industries due to its broad applications.…”

Section: Cadmiummentioning

confidence: 99%

In-situ monitoring of xenobiotics using genetically engineered whole-cell-based microbial biosensors: recent advances and outlook

Ali

Mittal

Kaur

2021

World J Microbiol Biotechnol

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Industrialisation, directly or indirectly, exposes humans to various xenobiotics. The increased magnitude of chemical pesticides and toxic heavy metals in the environment, as well as their intrusion into the food chain, seriously threatens human health. Therefore, the surveillance of xenobiotics is crucial for social safety and security. Online investigation by traditional methods is not su cient for the detection and identi cation of such compounds because of the high costs and their complexity. Advancement in the eld of genetic engineering provides a potential opportunity to use genetically modi ed microorganisms. In this regard, whole-cell-based microbial biosensors (WCBMB) represent an essential tool that couples genetically engineered organisms with an operator/promoter derived from a heavy metal-resistant operon combined with a regulatory protein in the gene circuit. The plasmid controls the expression of the reporter gene, such as gfp, luc, lux and lacZ, to an inducible gene promoter and has been widely applied to assay toxicity and bioavailability. This review summarises the recent trends in the development and application of microbial biosensors and the use of mobile genes for biomedical and environmental safety concerns.

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Cadmium Contamination in Water and Soil

Cited by 30 publications

References 78 publications

Modified Ziziphus spina-christi stones as green route for the removal of heavy metals

Modified Ziziphus spina-christi stones as green route for the removal of heavy metals

An isopentenyl transferase transgenic wheat isoline exhibits less seminal root growth impairment and a differential metabolite profile under Cd stress

In-situ monitoring of xenobiotics using genetically engineered whole-cell-based microbial biosensors: recent advances and outlook

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