Concentration and pollution assessment of heavy metals within surface sediments of the Raohe Basin, China

Jin, Weiqing; Duan, Maoqing; Li, Yiping; Nwankwegu, Amechi S.; Ji, Yong; Zhang, Jie

doi:10.1038/s41598-019-49724-7

Cited by 55 publications

(28 citation statements)

References 18 publications

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“…Various water contaminants exist, namely viruses, bacteria, dyes, organic molecules and toxic heavy metal ions [4,6]. All contaminants are biodegradable except heavy metal ions, which in addition to being nonbiodegradable, accumulate in the body [7][8][9]. Different industrial activities are responsible for heavy metal contamination in water, such as the mining, smelting, fertilizer and electroplating industries [2,4,6,8,9].…”

Section: Introductionmentioning

confidence: 99%

Ecofriendly Approach for Treatment of Heavy-Metal-Contaminated Water Using Activated Carbon of Kernel Shell of Oil Palm

Baby

Hussein

2020

Materials

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Heavy metal ion contamination in water poses a significant risk to human health as well as to the environment. Millions of tons of agricultural wastes are produced from oil palm plantations which are challenging to manage. In this study, we converted palm kernel shells (PKS) from a palm oil plantation into activated carbon (AC) having a surface area of 1099 m2/g using phosphoric acid as an activator. The prepared material was characterized using BET, XRD, Raman, FESEM and FTIR analyses. The AC was applied for the treatment of heavy-metal-contaminated water, and different parameters; the pH, adsorbent dosage, contact time and metal ion concentrations were varied to determine the optimal conditions for the metal ion adsorption. Different kinetic models; the zeroth, first-order and second-order, and Freundlich and Langmuir isotherm models were used to determine the mechanism of metal ion adsorption by the AC. Under the optimized conditions, Cr6+ and Pb2+ were removed completely, while Zn2+ and Cd2+ were more than 80% removed. This is a greener approach in which an agricultural waste, PKS is converted into a useful product, activated carbon and subsequently applied for the treatment of heavy metal-contaminated water.

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Section: Introductionmentioning

confidence: 99%

Ecofriendly Approach for Treatment of Heavy-Metal-Contaminated Water Using Activated Carbon of Kernel Shell of Oil Palm

Baby

Hussein

2020

Materials

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“…In view of rapid and intense industrialization, several studies have been conducted on soils [1,2], stream sediments [3,4], river sediments [5] and road dust (RD) or road-deposited sediments [6,7] around industrial areas that are significantly contaminated with potentially toxic elements (PTEs). The levels of PTEs in soils and RD are comparatively higher in industrial areas than in urban areas [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…The levels of PTEs in soils and RD are comparatively higher in industrial areas than in urban areas [8,9]. Trace metals present in soils are difficult to migrate owing to their long residual time and strong concealment [4]. Pollution caused by PTEs present in RD has become an interesting topic of research because RD is an important carrier of PTEs and can contribute as a non-point source to runoff pollution in urban areas [6,10].…”

Section: Introductionmentioning

confidence: 99%

Pollution Caused by Potentially Toxic Elements Present in Road Dust from Industrial Areas in Korea

et al. 2020

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We examined the pollution characteristics of potentially toxic elements (PTEs) in road dust (RD) from nine industrial areas in South Korea to assess PTE pollution levels and their environmental risks for devising better strategies for managing RD. The median concentrations (mg/kg) were in the order Zn (1407) > Cr (380) > Cu (276) > Pb (260) > Ni (112) > As (15) > Cd (2) > Hg (0.1). The concentration of PTEs was the highest at the Onsan Industrial Complex, where many smelting facilities are located. Our results show that Onsan, Noksan, Changwon, Ulsan, Pohang, and Shihwa industrial areas are heavily polluted with Cu, Zn, Cd, and Pb. The presence of these toxic elements in RD from the impervious layer in industrial areas may have a moderate to severe effect on the health of the biota present in these areas. The potential ecological risk index (Eri) for PTEs was in the decreasing order of Cd > Pb > Hg > Cu > As > Zn > Ni > Cr, indicating that the dominant PTE causing ecological hazards is Cd owing to its high toxicity. Our research suggests the necessity for the urgent introduction of an efficient management strategy to reduce RD, which adds to coastal pollution and affects human health.

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“…Toxic heavy metal contamination of soil is a major environmental problem throughout the world because of their long residual time, strong concealment, toxicity, and other characteristics (Wei et al., 2019). Due to the anthropogenic activities such as mining and industrialization, most soils of rural and urban environments may accumulate the heavy metals high enough to cause risks to human health and ecosystems (Wuana et al., 2010).…”

Section: Introductionmentioning

confidence: 99%

Application of response surface methodology for optimization of zinc elimination from a polluted soil using tartaric acid

Alman-Abad¹,

Pirkharrati²,

Asadzadeh

et al. 2020

Adsorption Science & Technology

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Heavy metal wastes generated from mining activities are a major concern in developing countries such as Iran. Increasing concentrations of these metals in the soil make up a severe health hazard due to their non-degradability and toxicity. In this study, batch washing experiments were conducted in order to investigate the removal efficiency of zinc by biodegradable chelates, tartaric acid. For this purpose, soil samples were collected from the zinc contaminated soil in the region of the Angouran, Zanjan, Iran. Hence, optimization of batch washing conditions followed using a three-level central composite design approach based on the response surface methodology. The results demonstrated that the effects of pH, tartaric acid concentration, and interaction between selective factors on the zinc removal efficiency were all positive and significant (P < 0.05). An optimum zinc removal efficiency of 89.35 ±2.12% was achieved at tartaric acid concentration of 200 mM l−1, pH of 4.46, and incubation time of 120 min as the optimal conditions. Accordingly, response surface methodology is appropriately capable to determine and optimize chemical soil washing process to remediate heavy metal polluted soil.

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Concentration and pollution assessment of heavy metals within surface sediments of the Raohe Basin, China

Cited by 55 publications

References 18 publications

Ecofriendly Approach for Treatment of Heavy-Metal-Contaminated Water Using Activated Carbon of Kernel Shell of Oil Palm

Ecofriendly Approach for Treatment of Heavy-Metal-Contaminated Water Using Activated Carbon of Kernel Shell of Oil Palm

Pollution Caused by Potentially Toxic Elements Present in Road Dust from Industrial Areas in Korea

Application of response surface methodology for optimization of zinc elimination from a polluted soil using tartaric acid

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