Environmental impacts of heavy metals (Co, Cu, Pb, Zn) in surficial sediments of estuary in Daliao River and Yingkou Bay (northeast China): concentration level and chemical fraction

2011 ◽  
Vol 66 (8) ◽  
pp. 2417-2430 ◽  
Author(s):  
Zhihao Wu ◽  
Mengchang He ◽  
Chunye Lin
Keyword(s):  
Heavy Metals ◽  
Environmental Impacts ◽  
Northeast China ◽  
Concentration Level ◽  
Surficial Sediments ◽  
Chemical Fraction

scholarly journals Ecological Risk Assessment and Contamination History of Heavy Metals in the Sediments of Chagan Lake, Northeast China

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 894
Author(s):  
Panfeng Liu ◽  
Chaojie Zheng ◽  
Meilan Wen ◽  
Xianrong Luo ◽  
Zhiqiang Wu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Principal Component Analysis ◽  
Ecological Risk ◽  
Surface Sediment ◽  
Northeast China ◽  
Principal Component ◽  
Potential Ecological Risk ◽  
210Pb Dating ◽  
History Of ◽  
Chagan Lake

The study deals with the spatio-temporal distribution of heavy metals in the sediments of Chagan lake, Northeast China. The pollution history of heavy metals is studied simultaneously through the 210Pb dating method by analyzing the characteristic of As, Hg, Cd, Cr, Ni, Cu, Pb, and Zn concentration-depth profiles. The potential ecological risk index (RI) and geo-accumulation index (Igeo) were used to evaluate the contamination degree. Principal component analysis (PCA), based on the logarithmic transformation and isometric log-ratio (ilr) transformed data, was applied with the aim of identifying the sources of heavy metals. The element concentrations show that the heavy metals are enriched in the surface sediment and sediment core with a varying degree, which is higher in the surficial residue. The results of Igeo indicate that the Cd and Hg in the surface sediment have reached a slightly contaminated level while other elements, uncontaminated. The results of RI show that the study area can be classified as an area with moderate ecological risk in which Cd and Hg mostly contribute to the overall risk. For the sediment core, the 210Pb dating results accurately reflect the sedimentary history over 153 years. From two evaluation indices (RI and Igeo) calculated by element concentration, there is no contamination, and the potential ecological risk is low during this period. The comparative study between raw and ilr transformed data shows that the closure effect of the raw data can be eliminated by ilr transformation. After that, the components obtained by robust principal component analysis (RPCA) are more representative than those obtained by PCA, both based on ilr transformed dataset, after eliminating the influence of outliers. Based on ilr transformed data with RPCA, three primary sources could be inferred: Cr, Ni, As, Zn, and Cu are mainly derived from natural sources; the main source of Cd and Hg are associated with agricultural activities and energy development; as for Pb, it originated from traffic and coal-burning activities, which is consistent with the fact that the development of tourism, fishery, and agriculture industries has led to the continuous increasing levels of anthropogenic Pb in Chagan Lake. The summarized results and conclusions will undoubtedly enhance the governmental awareness of heavy metal pollution and facilitate appropriate pollution control measures in Chagan Lake.

Influence of Heavy Metals on the Growth of Chlorella vulgaris

2021 ◽  
Vol 15 (3) ◽  
pp. 374-379
Author(s):  
Bingbing Pang ◽  
Mingzhou Zeng ◽  
Wenjia Zhang ◽  
Fengcai Ye ◽  
Changhua Shang
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Growth Rate ◽  
Growth Inhibition ◽  
Chlorella Vulgaris ◽  
Specific Growth ◽  
Concentration Level ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
Average Specific Growth Rate

Growth inhibition of chromium (Cr), cadmium (Cd) and lead (Pb) to fresh water microalga Chlorella vulgaris (C. vulgaris) FACHB-8 was examined. These results demonstrated that the concentration level (EC50 value) of three heavy metals (Cr, Cd and Pb) could be utilized as an indicator for evaluating the toxicities of Cr, Cd and Pb for microalga growth. The EC50 values of Cr for C. vulgaris were 0.22, 0.07 and 0.04 mg/L at 24, 48 and 72 h based on Algorithm 2 (%Ir, percent inhibition in average specific growth rate), respectively. The EC50 values of Cd for C. vulgaris were 2.76, 1.08 and 0.93 mg/L at 24, 48 and 72 h based on Algorithm 2, respectively. The EC50 values of Pb for C. vulgaris were 73.21, 65.02 and 48.38 mg/L at 24, 48 and 72 h based on Algorithm 2, respectively. The results laid a good foundation for the application of C. vulgaris in the water quality monitoring.

scholarly journals A Predictive Environmental Assessment Method for Construction Operations: Application to a Northeast China Case Study

2018 ◽  
Vol 10 (11) ◽  
pp. 3868 ◽  
Author(s):  
Kailun Feng ◽  
Weizhuo Lu ◽  
Thomas Olofsson ◽  
Shiwei Chen ◽  
Hui Yan ◽  
...  
Keyword(s):  
Global Warming ◽  
Environmental Impacts ◽  
Environmental Assessment ◽  
Northeast China ◽  
Dynamic Environments ◽  
Assessment Method ◽  
Process Information ◽  
Construction Operations ◽  
Impact Reduction

Construction accounts for a considerable number of environmental impacts, especially in countries with rapid urbanization. A predictive environmental assessment method enables a comparison of alternatives in construction operations to mitigate these environmental impacts. Process-based life cycle assessment (pLCA), which is the most widely applied environmental assessment method, requires lots of detailed process information to evaluate. However, a construction project usually operates in uncertain and dynamic project environments, and capturing such process information represents a critical challenge for pLCA. Discrete event simulation (DES) provides an opportunity to include uncertainty and capture the dynamic environments of construction operations. This study proposes a predictive assessment method that integrates DES and pLCA (DES-pLCA) to evaluate the environmental impact of on-site construction operations and supply chains. The DES feeds pLCA with process information that considers the uncertain and dynamic environments of construction, while pLCA guides the comprehensive procedure of environmental assessment. A DES-pLCA prototype was developed and implemented in a case study of an 18-storey building in Northeast China. The results showed that the biggest impact variations on the global warming potential (GWP), acidification potential (AP), eutrophication (EP), photochemical ozone creation potential (POCP), abiotic depletion potential (ADP), and human toxicity potential (HTP) were 5.1%, 4.1%, 4.1%, 4.7%, 0.3%, and 5.9%, respectively, due to uncertain and dynamic factors. Based on the proposed method, an average impact reduction can be achieved for these six indictors of 2.5%, 21.7%, 8.2%, 4.8%, 32.5%, and 0.9%, respectively. The method also revealed that the material wastage rate of formwork installation was the most crucial managing factor that influences global warming performance. The method can support contractors in the development and management of environmentally friendly construction operations that consider the effects of uncertainty and dynamics.

Agronomical and environmental implications of soil enrichment with p and k and heavy metals from animal slurries

1990 ◽  
Vol 1990 ◽  
pp. 41-41
Author(s):  
F.A.M. de Haan
Keyword(s):  
Heavy Metals ◽  
The Netherlands ◽  
Concentration Level ◽  
Raw Materials ◽  
Animal Husbandry ◽  
Animal Manure ◽  
List Type ◽  
Environmental Implications ◽  
Soil Enrichment ◽  
Fodder Production

A few decades ago in The Netherlands in the same way as in a number of other West-European countries a development started of excessive growth of animal husbandry. While in former agricultural production where animals were involved more or less a balance existed between the number of animals to be held on a certain farm, and the area available for feed and fodder production, this balance was now disturbed by the import of huge quantities of feed and raw materials for feed production. This has led to the situation that a mineral excess from animal manure exists for The Netherlands as a whole. In specific parts of the country, especially the sandy area, mineral availability has grown to excessive amounts. The environmental problems involved are related to:-leaching of nitrate to groundwater at a concentration level which causes unsuitability for drinking water purposes;-accumulation of phosphorus in the soil profile, and in case of P-saturation of the soil, leaching to groundwater and surface water, thus inducing eutrophlcation problems;-leaching of K to groundwater at a concentration level exceeding the potassium standard;-accumulation of heavy metals in soil, especially Cd, Cu and Zn, at a level which may induce malfunctioning of soil, both with respect to water quality, and to crop yield and crop composition.

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