Evaluation model of major heavy metals pollution factors in coastal waters and sediments

Abstract

a b s t r a c tIt has great a subjective influence on the evaluation of major heavy metal pollution factors in coastal waters and sediments by using the traditional Nemerow exponential method, without considering the harmful differences of different heavy metals, and resulting in a low accuracy of the evaluation results. In this paper, a new model to evaluate the major heavy metal pollution factors in coastal waters and sediments is established, to calculate the single pollution index and potential ecological risk index of heavy metals. On this basis, the fuzzy comprehensive evaluation method is used to construct the main heavy metal pollution factor model of coastal waters and sediments. The heavy metal pollution factor is reasonably evaluated and the risk grade of heavy metal pollution factor in coastal waters and sediments is obtained. The results of sampling analysis show that the evaluation results obtained by the model are as follows: the pollution index of heavy metals in the coastal water with the order of Pb > Cu > Hg > As > Cd > Zn; the potential ecological risk index of heavy metals in sediments is Pb > Cu > As > Zn > Hg > Cd. The pollution degree of area C is the highest, area A is the second, and area B is the smallest. The results show that the model can accurately evaluate the main heavy metal pollution factors in coastal waters and sediments.

Characteristics and Health Risk Assessment of Heavy Metal Pollution in Haikou Bay and Adjacent Seas

“…With the economic and social development of Haikou City, especially since the development and construction of Hainan International Tourism Island, large-scale coastal tourism and marine industry development have led to population aggregation and high resource consumption, making the coastal waters of Haikou Bay increasingly polluted [19]. Existing studies have paid more attention to the pollution characteristics of seawater or surface sediments [17,[20][21][22][23][24], while comprehensive studies on the distribution characteristics, pollution sources and influencing factors of heavy metals in seawater, surface sediments, and fish are relatively lacking. Therefore, in this study, the concentrations of seven heavy metal elements (Cu, Pb, Zn, Cd, Cr, Hg, and As) in the surface and bottom water, surface sediments, and five species of fish in Haikou Bay and adjacent bodies of water were analyzed.…”

Detection of Cd2+ in Aqueous Solution by the Fluorescent Probe of CdSe/CdS QDs Based on OFF–ON Mode

“…Water pollution includes heavy metal pollution [ 1 , 2 , 3 ] and radionuclide pollution [ 4 , 5 ]. Due to the non-biodegradable nature, heavy metal pollution has always been a problem, until now.…”

Preparation of the Carbonized Zif−8@PAN Nanofiber Membrane for Cadmium Ion Adsorption

“…With the development of the global economy and continuous progress of light industry, the discharge of industrial waste water has rapidly increased. The pollutants in waste water containing heavy metal ions have entered and accumulated in drinking water resources and the soil [1,2], which not only affects the output of agricultural products, but also ultimately endangers human health through the food chain [3][4][5]. The existing methods used to remove heavy metal pollutions mainly include filtration [6], adsorption [7,8], membrane separation [9], ion exchange [10] and photocatalytic degradation [11].…”