1
|
Near-infrared spectroscopy for prediction of potentially toxic elements in soil and sediments from a semiarid and coastal humid tropical transitional river basin. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107544] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
2
|
Integrated Assessment of Affinity to Chemical Fractions and Environmental Pollution with Heavy Metals: A New Approach Based on Sequential Extraction Results. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18168458. [PMID: 34444207 PMCID: PMC8391145 DOI: 10.3390/ijerph18168458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/29/2021] [Accepted: 08/05/2021] [Indexed: 11/18/2022]
Abstract
To assess the affinity degree of heavy metals (HMs) to geochemical phases, many indices with several limitations are used. Thus, this study aims to develop a new complex index for assessing contamination level and affinity to chemical fractions in various solid environmental media. For this, a new integrated approach using the chemical affinity index (CAF) is proposed. Comparison of CAF with %F on the literature examples on fractionation of HMs from soils, bottom sediments, atmospheric PM10, and various particle size fractions of road dust proved a less significant role of the residual HMs fraction and a greater contribution of the rest of the chemical fractions in the pollution of all studied environments. This fact is due to the normalization relative to the global geochemical reference standard, calculations of contribution of an individual element to the total pollution by all studied HMs, and contribution of the particular chemical fraction to the total HMs content taken into account in CAF. The CAF index also shows a more significant role in pollution and chemical affinity of mobile and potentially mobile forms of HMs. The strong point of CAF is the stability of the obtained HM series according to the degree of chemical affinity and contamination. Future empirical studies are necessary for the more precise assessment of CAF taking into account the spatial distribution of HMs content, geographic conditions, geochemical factors, the intensity of anthropogenic impact, environmental parameters (temperature, humidity, precipitation, pH value, the content of organic matter, electrical conductivity, particle size distribution, etc.). The combined use of CAF along with other indices allows a more detailed assessment of the strength of HMs binding to chemical phases, which is crucial for understanding the HMs’ fate in the environment.
Collapse
|
3
|
Ayyanar A, Thatikonda S. Experimental and Numerical studies on remediation of mixed metal-contaminated sediments by electrokinetics focusing on fractionation changes. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:316. [PMID: 33931801 DOI: 10.1007/s10661-021-09064-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 04/11/2021] [Indexed: 06/12/2023]
Abstract
Electrokinetic remediation technique is widely applied for the removal of heavy metal from contaminated soil, but the soil buffering capacity and fractionation of heavy metals mainly affect the cost and duration of the treatment. This study aims to treat heavy metal-contaminated sediments by electrokinetic remediation (EKR) technique by using various enhancing agents such as EDTA, [Formula: see text], HCI, [Formula: see text], acetic acid and citric acid for optimizing the cost and treatment duration. The optimum molar concentration of enhancing agent for treatment was estimated by batch experiments to maximize the dissolution of target heavy metals and reduce the dissolution of earth metals (Fe, Al and Ca) to maintain soil health. The EKR experiments were performed up to 15 days with the above enhancing agents to reduce the risk associated with heavy metals and the selection of enhancing agents based on removal efficiency was found to be in an order of EDTA > citric acid > acetic acid > [Formula: see text] > HCl [Formula: see text] [Formula: see text]. Also, a numerical model has been developed by incorporating main electrokinetic transport phenomena (electromigration and electroosmosis) and geochemical processes for the prediction of treatment duration and to scale up the EKR process. The model predicts well with experimental heavy metal removal with a MAPD of [Formula: see text] 2-18 %. The parametric study on electrode distance for full-scale EKR treatment was found in this study as [Formula: see text] 0.5 m.
Collapse
Affiliation(s)
- Arulpoomalai Ayyanar
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana, 502285, India
| | - Shashidhar Thatikonda
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana, 502285, India.
| |
Collapse
|
4
|
Jayasooryan KK, Ramasamy EV, Chandini PK, Mohan M. Fractionation and accumulation of selected metals in a tropical estuary, south-west coast of India. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:220. [PMID: 33763751 DOI: 10.1007/s10661-021-09019-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
Estimating the fractional distribution of sediment-bound heavy metals is highly significant for its ecological risk assessment in contaminated aquatic systems, since environmental factors enhance the mobility of heavy metals and its accumulation in different ecological matrices. In this study, the fractional distribution of Zn, Cd, Pb and Cu in the sediments of the Cochin estuary, along the south-west coast of India, was estimated along with its accumulation in four edible crustaceans. The high mobility of heavy metals in the Cochin estuary was evident from the distribution in fractions other than residual fraction. The exchangeable fractions of Zn and Cd were high in the Cochin estuary, indicating its high bioavailability. Even though the exchangeable fraction is negligible, Pb poses the risk of bioaccumulation due to the presence of oxidisable and reducible fractions. The level of heavy metals varies in different species of edible prawns, and high accumulation of all metals was observed in Metapenaeus dobsoni. Various risk assessment indices show that Cd and Pb pose significant ecological and human health risks in the Cochin estuary.
Collapse
Affiliation(s)
- K K Jayasooryan
- KSCSTE-Centre for Water Resources Development and Management, Kozhikode, Kerala, India
| | - E V Ramasamy
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam, Kerala, India
| | - P K Chandini
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam, Kerala, India
- School of Environmental Studies, Cochin University of Science and Technology, Cochin, Kerala, India
| | - Mahesh Mohan
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam, Kerala, India
| |
Collapse
|
5
|
Ayyanar A, Thatikonda S. Enhanced electrokinetic remediation (EKR) for heavy metal-contaminated sediments focusing on treatment of generated effluents from EKR and recovery of EDTA. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:136-147. [PMID: 32495995 DOI: 10.1002/wer.1369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/17/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
Electrokinetic remediation (EKR) is one of the most successful remediation techniques to treat the sediments contaminated with heavy metals. EDTA is the most widely used enhancing agent to improve the transport process in EKR. But often the generated effluents from EKR contains a high concentration of heavy metals, which cannot be disposed of without treatment. The major objective of this study includes the estimation of optimal concentration of chelating agent EDTA, followed by treatment of contaminated sediments by EKR technique for heavy metal removal. The effluents generated from EKR were further studied for recovery and reuse of EDTA and for safe discharge of heavy metals. The optimum concentration of EDTA was found as 0.05 M with a solid-to-liquid ratio as 1:10. When fresh EDTA was used as enhancing agent the average removal of heavy metals obtained as 74.8% with EKR, whereas the application of recovered EDTA in treatment process in first, second, and third cycle showed the slight reduction of heavy metals of about 71.1%, 63.5%, and 52.1%, respectively. The heavy metal removal by recovered EDTA was effective in reduction of heavy metals up to three cycles of re-use while reducing the ecological risk in sediments. PRACTITIONER POINTS: Treatment of contaminated sediments with heavy metals achieved by electrokinetic remediation (EKR) technique enhanced with EDTA. The recovery of EDTA and heavy metal reduction from the generated effluents during EKR treatment were performed by the addition of FeCl3 and Na2 PO4, and optimized concentration was evaluated. This study found that the use of recovered EDTA in EKR treatment has effectively reduced the risk associated with heavy metals.
Collapse
Affiliation(s)
- Arulpoomalai Ayyanar
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Sangareddy, Telangana, India
| | - Shashidhar Thatikonda
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Sangareddy, Telangana, India
| |
Collapse
|
6
|
Christophoridis C, Evgenakis E, Bourliva A, Papadopoulou L, Fytianos K. Concentration, fractionation, and ecological risk assessment of heavy metals and phosphorus in surface sediments from lakes in N. Greece. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2020; 42:2747-2769. [PMID: 31933038 DOI: 10.1007/s10653-019-00509-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 12/25/2019] [Indexed: 06/10/2023]
Abstract
The presence of phosphorus (P) and heavy metals (HMs) in surface sediments originating from lakes Volvi, Kerkini, and Doirani (N. Greece), as well as their fractionation patterns, were investigated. No statistically significant differences in total P content were observed among the studied lakes, but notable differences were observed among sampling periods. HM contents in all lakes presented a consistent trend, i.e., Mn > Cr > Zn > Pb > Ni > Cu > Cd, while the highest concentrations were recorded in Lake Kerkini. Most of the HMs exceeded probable effect level value indicating a probable biological effect, while Ni in many cases even exceeded threshold effects level, suggesting severe toxic effects. P was dominantly bound to metal oxides, while a significant shift toward the labile fractions was observed during the spring period. The sum of potentially bioavailable HM fractions followed a downward trend of Mn > Cr > Pb > Zn > Cu > Ni > Cd for most lakes. The geoaccumulation index Igeo values of Cr, Cu, Mn, Ni, and Zn in all lakes characterized the sediments as "unpolluted," while many sediments in lakes Volvi and Kerkini were characterized as "moderately to heavily polluted" with regard to Cd. The descending order of potential ecological risk [Formula: see text] was Cd > Pb > Cu > Ni > Cr > Zn > Mn for all the studied lakes. Ni and Cr presented the highest toxic risk index values in all lake sediments. Finally, the role of mineralogical divergences among lake sediments on the contamination degree was signified.
Collapse
Affiliation(s)
- Christophoros Christophoridis
- Environmental Pollution Control Laboratory, Chemistry Department, Aristotle University of Thessaloniki, 54124, Thessaloníki, Greece.
| | - Emmanouil Evgenakis
- Environmental Pollution Control Laboratory, Chemistry Department, Aristotle University of Thessaloniki, 54124, Thessaloníki, Greece
| | - Anna Bourliva
- School of Geology, Aristotle University of Thessaloniki, 54124, Thessaloníki, Greece
| | - Lambrini Papadopoulou
- Department of Mineralogy-Petrology-Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124, Thessaloníki, Greece
| | - Konstantinos Fytianos
- Environmental Pollution Control Laboratory, Chemistry Department, Aristotle University of Thessaloniki, 54124, Thessaloníki, Greece
| |
Collapse
|
7
|
Shao S, Liu H, Tai X, Zheng F, Li J, Li Y. Speciation and migration of heavy metals in sediment cores of urban wetland: bioavailability and risks. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:23914-23925. [PMID: 32297118 DOI: 10.1007/s11356-020-08719-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
To examine the status and risk of heavy metal pollution in an urban wetland in China, the distribution and speciation of chromium (Cr) and other metals (Cd, Cu, Pb, and Zn) were examined. We investigated the impact of three major land uses (residential and industrial (RI), orange plantation (OP), and mixed OP and RI (OPRI)) on the heavy metal characteristics using sediment cores (0-60 cm below water/sediment interface) collected in Sanyang Wetland, China. It was found that all the metals (Cr, Cd, Cu, Pb, and Zn) had lower concentrations in the top layers but higher contents in the bottom layers of sediments. Species of metals in sediments were dominated by their secondary phase (i.e., exchangeable and carbonate bound, Fe-Mn bound and organic bound) with relatively low contents of primary phase (i.e., residual form), except for Cr in RI affected river sediments that had a relatively high content of primary phase (20.97-36.07%). The ratio of secondary phase to primary phase (RSP) and risk assessment code (RAC) methods were applied to assess environmental risk. The results implied that the metal mobility and bioavailability could significantly cause urban wetland environmental quality decline, and thus enhanced strategies should be required to target the capture and removal of metals.
Collapse
Affiliation(s)
- Shuai Shao
- College of Life and Environmental Sciences, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang, China
- Hefei Investigation Institute LLc, Hefei, 230041, Anhui, China
| | - Huan Liu
- WZU-UNBC Joint Research Institute of Ecology and Environment, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang, China
- UBC Bioreactor Technology Group, School of Engineering, University of British Columbia (UBC), Okanagan Campus, Kelowna, British Columbia, V1V 1V7, Canada
| | - Xiuquan Tai
- College of Life and Environmental Sciences, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang, China
| | - Feng Zheng
- College of Life and Environmental Sciences, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang, China
- Luqiao Sewage Treatment Co., Ltd, Taizhou, 318053, Zhejiang, China
| | - Jianbing Li
- WZU-UNBC Joint Research Institute of Ecology and Environment, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang, China.
- Environmental Engineering Program, University of Northern British Columbia (UNBC), 3333 University Way, Prince George, British Columbia, V2N 4Z9, Canada.
| | - Yubao Li
- College of Life and Environmental Sciences, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang, China.
- WZU-UNBC Joint Research Institute of Ecology and Environment, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang, China.
| |
Collapse
|
8
|
Shen B, Wang X, Zhang Y, Zhang M, Wang K, Xie P, Ji H. The optimum pH and Eh for simultaneously minimizing bioavailable cadmium and arsenic contents in soils under the organic fertilizer application. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 711:135229. [PMID: 32000353 DOI: 10.1016/j.scitotenv.2019.135229] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 10/24/2019] [Accepted: 10/25/2019] [Indexed: 06/10/2023]
Abstract
Cadmium (Cd) and arsenic (As) are usually found in contaminated soils. Their bioavailabilities are often related to pH and Eh, which indicate a generally contrasting or antagonistic effect. In this paper, the pH and Eh of soil samples were altered by adding organic fertilizer, and Tessier sequential extraction procedures were used to extract heavy metal speciation. With increasing pH and decreasing Eh, the content of the exchangeable, carbonate-bound, Fe-Mn oxide-bound, and organic-bound forms of the Cd decreased. The content of the residual form of Cd increased. The content of water-soluble Cd also increased. In terms of As, the content of the water-soluble, exchangeable, carbonate-bound, and organic-bound forms increased, and the content of the residual form decreased. Bioavailable forms contained water-soluble and exchangeable forms. With increasing pH or decreasing Eh, bioavailable Cd content linearly decreased, whereas bioavailable As content exponentially increased. The fitting curve showed that compared with 200 mV, the bioavailable Cd content decreased by 52.4%, and the bioavailable As content increased by 3.2 times at -400 mV. Finally, using the indicator of trade-off value, optimum pH = 7.31, and Eh = -130 mV, the bioavailable Cd and As contents were simultaneously maintained at a relatively low level. The novelty of this paper is studying the effects of different soil pH and Eh values changed by organic fertilizer on the speciation of Cd and As rather than the direct quantitative effects between organic fertilizer and the speciation of Cd and As, which can better explain the mechanism underlying the effect of organic fertilizer on the speciation of Cd and As.
Collapse
Affiliation(s)
- Biaobiao Shen
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xuemei Wang
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Yan Zhang
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Meng Zhang
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Kai Wang
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Pan Xie
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Hongbing Ji
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Municipal Key Laboratory of Resource Environment and GIS, College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China.
| |
Collapse
|
9
|
Speciation Variation and Comprehensive Risk Assessment of Metal(loid)s in Surface Sediments of Intertidal Zones. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15102125. [PMID: 30261691 PMCID: PMC6211063 DOI: 10.3390/ijerph15102125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 09/14/2018] [Accepted: 09/19/2018] [Indexed: 11/17/2022]
Abstract
Speciation variation and comprehensive risk assessment of metal(loid)s (As, Cd, Cr, Cu, Mn, Ni, Pb and Zn) were investigated in surface sediments from the intertidal zones of the Yellow River Delta, China. Results showed that only the concentrations of As, Cd and Pb were significantly different between April and September (p < 0.01). In April, the residual fraction (F4) was predominant for As, Cr, Cu, Ni and Zn. However, the exchangeable and carbonate-associated fraction (F1) was dominant for Cd averaging 49.14% indicating a high environmental risk. In September, the F4 fraction was predominant and the F1 fraction was very low for most metal(loid)s except Cd and Mn. The geo-accumulation index (Igeo), the F1 fraction and potential ecological risk index (PERI) of most metal(loid)s were relatively low in surface sediments for both seasons. But Pb, As and Ni were between the threshold effect level (TEL)and the probable effect level (PEL) for 66.67%, 83.33% and 91.67% in April and As and Ni were between TEL and PEL for 41.67% and 91.67%, which indicated that the concentration of them was likely to occasionally exhibit adverse effects on the ecosystem. Although the Igeo, the F1 fraction or PERI of Cd in both seasons was higher at some sites, the results of sediment quality guidelines (SQGs) indicated that the biological effects of Cd were rarely observed in the studied area.
Collapse
|
10
|
Luo Y, McCullough LE, Tzeng JY, Darrah T, Vengosh A, Maguire RL, Maity A, Samuel-Hodge C, Murphy SK, Mendez MA, Hoyo C. Maternal blood cadmium, lead and arsenic levels, nutrient combinations, and offspring birthweight. BMC Public Health 2017; 17:354. [PMID: 28438148 PMCID: PMC5402649 DOI: 10.1186/s12889-017-4225-8] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 04/05/2017] [Indexed: 12/24/2022] Open
Abstract
Background Cadmium (Cd), lead (Pb) and arsenic (As) are common environmental contaminants that have been associated with lower birthweight. Although some essential metals may mitigate exposure, data are inconsistent. This study sought to evaluate the relationship between toxic metals, nutrient combinations and birthweight among 275 mother-child pairs. Methods Non-essential metals, Cd, Pb, As, and essential metals, iron (Fe), zinc (Zn), selenium (Se), copper (Cu), calcium (Ca), magnesium (Mg), and manganese (Mn) were measured in maternal whole blood obtained during the first trimester using inductively coupled plasma mass spectrometry. Folate concentrations were measured by microbial assay. Birthweight was obtained from medical records. We used quantile regression to evaluate the association between toxic metals and nutrients due to their underlying wedge-shaped relationship. Ordinary linear regression was used to evaluate associations between birth weight and toxic metals. Results After multivariate adjustment, the negative association between Pb or Cd and a combination of Fe, Se, Ca and folate was robust, persistent and dose-dependent (p < 0.05). However, a combination of Zn, Cu, Mn and Mg was positively associated with Pb and Cd levels. While prenatal blood Cd and Pb were also associated with lower birthweight. Fe, Se, Ca and folate did not modify these associations. Conclusion Small sample size and cross-sectional design notwithstanding, the robust and persistent negative associations between some, but not all, nutrient combinations with these ubiquitous environmental contaminants suggest that only some recommended nutrient combinations may mitigate toxic metal exposure in chronically exposed populations. Larger longitudinal studies are required to confirm these findings. Electronic supplementary material The online version of this article (doi:10.1186/s12889-017-4225-8) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Yiwen Luo
- Bioinformatics Research Center, North Carolina State University, Raleigh, NC, USA.,Department of Statistics, North Carolina State University, Raleigh, NC, USA
| | | | - Jung-Ying Tzeng
- Bioinformatics Research Center, North Carolina State University, Raleigh, NC, USA. .,Department of Statistics, North Carolina State University, Raleigh, NC, USA. .,Department of Statistics, National Cheng-Kung University, Tainan, Taiwan.
| | - Thomas Darrah
- School of Earth Sciences, The Ohio State University, Columbus, OH, USA
| | - Avner Vengosh
- Nicholas School of the Environment, Duke University, Durham, NC, USA
| | - Rachel L Maguire
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27533, USA
| | - Arnab Maity
- Department of Statistics, North Carolina State University, Raleigh, NC, USA
| | | | | | | | - Cathrine Hoyo
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27533, USA.
| |
Collapse
|
11
|
Li Y, Arocena JM, Zhang Q, Thring RW, Li J. Heavy metals and nutrients (carbon, nitrogen, and phosphorus) in sediments: relationships to land uses, environmental risks, and management. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:7403-7412. [PMID: 28108921 DOI: 10.1007/s11356-017-8385-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Accepted: 01/04/2017] [Indexed: 06/06/2023]
Abstract
Management of sediments in polluted rivers requires an inventory of sediment quantities as well as their nutrient and metal contents and the chemical forms of pollutants. We investigated the influence of three major land uses (i.e., orange plantation-OP, OP + residential + industrial-OPRI, and residential + industrial-RI) on the quality of surface sediments (0-20 cm below water/sediment interface) at the Sanyang Wetland (China). The total contents of metals (As, Cd, Cr, Cu, Ni, Pb, and Zn) and nutrients (C, N, and P) as well as metal speciation in sediments were examined. GIS technology was used to estimate the volume of sediments needed to calculate the amounts of stored nutrients and metals in sediments. The surface sediments in the 3.2-km2 study area contain more than 2800 Mg C, 200 Mg N, and 100 Mg P. OPRI and RI land uses contribute more total C, N, P, Zn, and Cd to sediments than OP land use. High contents of C, N, and P may provide options to recycle the sediments as fertilizer but must be used with caution due to high levels of metals. Total Cd in sediments is at an order of magnitude (up to 59 mg kg-1) higher than the Level III criterion in the Chinese Environmental Quality Standards for Soil. Sediments in all land uses have very high risks due to >50% exchangeable + carbonate-bound Zn, Ni, and Cd. It is suggested that toxicity tests be conducted to better assess the environmental risks associated with any potential use of sediments.
Collapse
Affiliation(s)
- Yubao Li
- Joint Research Institute of Ecology and Environment, Wenzhou University, Wenzhou, China.
- Joint Research Institute of Ecology and Environment, University of Northern British Columbia, Prince George, Canada.
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, 325025, China.
- Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou, China.
| | - Joselito M Arocena
- Joint Research Institute of Ecology and Environment, Wenzhou University, Wenzhou, China
- Joint Research Institute of Ecology and Environment, University of Northern British Columbia, Prince George, Canada
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, 325025, China
- Environmental Science and Engineering Programs, University of Northern British Columbia, Prince George, BC, V2N 4Z9, Canada
| | - Qiao Zhang
- College of Chemistry and Material Engineering, Wenzhou University, Wenzhou, 325025, China
| | - Ronald W Thring
- Joint Research Institute of Ecology and Environment, Wenzhou University, Wenzhou, China
- Joint Research Institute of Ecology and Environment, University of Northern British Columbia, Prince George, Canada
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, 325025, China
- Environmental Science and Engineering Programs, University of Northern British Columbia, Prince George, BC, V2N 4Z9, Canada
| | - Jianbing Li
- Joint Research Institute of Ecology and Environment, Wenzhou University, Wenzhou, China
- Joint Research Institute of Ecology and Environment, University of Northern British Columbia, Prince George, Canada
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, 325025, China
- Environmental Science and Engineering Programs, University of Northern British Columbia, Prince George, BC, V2N 4Z9, Canada
| |
Collapse
|
12
|
Yang C, Wu Y, Zhang F, Liu L, Pan R. Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir. CHEMICAL SPECIATION & BIOAVAILABILITY 2016. [DOI: 10.1080/09542299.2016.1206838] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Changming Yang
- Key Laboratory of Yangtze River Water Environment of the Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, China
| | - Yaqiong Wu
- Key Laboratory of Yangtze River Water Environment of the Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, China
| | - Fen Zhang
- Key Laboratory of Yangtze River Water Environment of the Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, China
| | - Lin Liu
- Key Laboratory of Yangtze River Water Environment of the Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, China
| | - Ruijie Pan
- Key Laboratory of Yangtze River Water Environment of the Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, China
| |
Collapse
|
13
|
Xiao R, Bai J, Lu Q, Zhao Q, Gao Z, Wen X, Liu X. Fractionation, transfer, and ecological risks of heavy metals in riparian and ditch wetlands across a 100-year chronosequence of reclamation in an estuary of China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 517:66-75. [PMID: 25723958 DOI: 10.1016/j.scitotenv.2015.02.052] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 02/12/2015] [Accepted: 02/13/2015] [Indexed: 04/15/2023]
Abstract
The effect of reclamation on heavy metal concentrations and the ecological risks in ditch wetlands (DWs) and riparian wetlands (RWs) across a 100-year chronosequence in the Pearl River Estuary of China was investigated. Concentrations of 4 heavy metals (Cd, Cu, Pb, and Zn) in soil and plant samples, and sequential extracts of soil samples were determined, using inductively coupled plasma atomic absorption spectrometry. Results showed that heavy metal concentrations were higher in older DW soils than in the younger ones, and that the younger RW soils contained higher heavy metal concentrations compared to the older ones. Although the increasing tendency of heavy metal concentrations in soil was obvious after wetland reclamation, the metals Cu, Pb, and Zn exhibited low or no risks to the environment based on the risk assessment code (RAC). Cd, on the other hand, posed a medium or high risk. Cd, Pb, and Zn were mainly bound to Fe-Mn oxide, whereas most of Cu remained in the residual phase in both ditch and riparian wetland soils, and the residual proportions generally increased with depth. Bioconcentration and translocation factors for most of these four heavy metals significantly decreased in the DWs with older age (p<0.05), whereas they increased in the RWs with younger age (p<0.05). The DW soils contained higher concentrations of heavy metals in the organic fractions, whereas there were more carbonate and residual fractions in the RW soils. The non-bioavailable fractions of Cu and Zn, and the organic-bound Cd and Pb significantly inhibited plant growth.
Collapse
Affiliation(s)
- Rong Xiao
- State Key Laboratory of Water Environment Stimulation, School of Environment, Beijing Normal University, Beijing 100875, PR China; School of Nature Conservation, Beijing Forestry University, Beijing 100083, PR China
| | - Junhong Bai
- State Key Laboratory of Water Environment Stimulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.
| | - Qiongqiong Lu
- State Key Laboratory of Water Environment Stimulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Qingqing Zhao
- State Key Laboratory of Water Environment Stimulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Zhaoqin Gao
- State Key Laboratory of Water Environment Stimulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Xiaojun Wen
- State Key Laboratory of Water Environment Stimulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Xinhui Liu
- State Key Laboratory of Water Environment Stimulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| |
Collapse
|
14
|
|
15
|
Gupta B, Kumar R, Rani M. Speciation of heavy metals in water and sediments of an urban lake system. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2013; 48:1231-1242. [PMID: 23647114 DOI: 10.1080/10934529.2013.776886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The speciation pattern of heavy metals namely chromium, nickel, copper and lead in water and sediments of an urban lake system of high ecological significance was studied. The total available metal (dissolved) in water follows the sequence Ni>Cr>Pb>Cu. However, a different pattern Pb>Cu>Ni>Cr is observed for total available metal (metal in non-residual phases) in sediments. Significant spatial variations are observed in different geochemical forms of the metals as indicated by two-way ANOVA. This is attributed to localized anthropogenic activities. The anthropogenic parameters of water not only show statistically significant correlations among themselves but also positively correlate with the particulate forms of Cr, Cu and Pb. The total available forms of copper and lead correlate with the organic content of the sediments. Principal component analysis (PCA) separates the metals into three groups: I (Cr); II (Ni); III (Cu and Pb). The polluted sites were identified using hierarchical cluster analysis. Risk assessment code (RAC) analysis indicates low to medium risk due to Cr at most of the sites. However, Ni, Cu and Pb pose medium to high risk. But Pb at a few sites presents very high risk (RAC > 50%).
Collapse
Affiliation(s)
- Bina Gupta
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India.
| | | | | |
Collapse
|