The distribution characteristics of heavy metals such as Cu, Zn, Pb, Cd, Hg. As in seawater, superficail sediments and several marine organisms of Dongzhai Harbor in Hainan were analyzed. Index methods of the single f...The distribution characteristics of heavy metals such as Cu, Zn, Pb, Cd, Hg. As in seawater, superficail sediments and several marine organisms of Dongzhai Harbor in Hainan were analyzed. Index methods of the single factor and geo-accumulation were used to assess the pollution degree of heavy metals. The results showed that the heavy metal levels in the seawater of Dongzhai Harbor accorded with the first category of the seawater except Pb, and were much lower than the fishery water quality standard; the concentration of the heavy metal in surface sediments did not exceed the national benchmark of the first-class of marine sediment quality basically, and the superficial sediments were essentially uncontaminated; the heavy metal content in wetland sediments was slightly higher than those in other typical mangrove wetland island of Hainan and marine sediments in Dongzhai Haibor, which indicated this area might has been affected by land-based pollution influence, and this should cause the attention of related departments; the heavy metal concentrations in marine organisms were up to the first category. All were not beyond the standard of non-environmental pollution aquatic products.展开更多
Heavy metal pollution from industrial wastewater is a worldwide environmental issue. Biosorption of heavy metals by using biosorbents derived from various types of biomass has been shown to be effective for the uptake...Heavy metal pollution from industrial wastewater is a worldwide environmental issue. Biosorption of heavy metals by using biosorbents derived from various types of biomass has been shown to be effective for the uptake of heavy metal ions. In this study, biosorbents derived from the biomass of a group of marine macroalgae were used for the removal and recovery of heavy metal ions from aqueous solutions. Results indicated that the biosorbents have high uptake capacities and affinities for a number of heavy metal ions. The uptake capacities of the biosorbents were in the range of 1.0 to 1.5mmol·g-1 for divalent heavy metal ions. The kinetics of the uptake process was fast and the process can be used in both batch and fixed-bed operations. It appears that the biosorption process by using biosorbents from marine macroalgae can be an efficient and cost effective technology for the treatment of heavy metal containing wastewater.展开更多
The paper presents the results of a comprehensive monitoring of the polygon： ＂Odessa Region, north-western part of the Black Sea＂ for the period 2009-2011. It is shown that most of the copper and nickel is brought ...The paper presents the results of a comprehensive monitoring of the polygon： ＂Odessa Region, north-western part of the Black Sea＂ for the period 2009-2011. It is shown that most of the copper and nickel is brought into the sea from the catchment area, and zinc and cadmium are mainly of the autochthonous origin. It is found that in 2010, after heavy rains, the area of bottom sediments contaminated by copper and nickel was increased. The main source of copper in the sea is vast vineyards.展开更多
According to 12 kinds of water quality elements(salt,COD,DO,PO_(4)^(3)--P,inorganic nitrogen,Oil,Cu,Pb,Zn,Cd,Hg,As)in 20 sampling stations in Dafeng sea area.The single factor index method was used to evaluate the wat...According to 12 kinds of water quality elements(salt,COD,DO,PO_(4)^(3)--P,inorganic nitrogen,Oil,Cu,Pb,Zn,Cd,Hg,As)in 20 sampling stations in Dafeng sea area.The single factor index method was used to evaluate the water pollution level,the clustering method was used to identify the pollution area,and the source of pollution was analyzed by principal component analysis.The results show:the water quality environment in Dafeng Sea is generally good,and inorganic nitrogen and phosphate are the main over-standard factors.;The spatial cluster analysis shows that the distribution of water quality pollution in Dafeng sea area is low in the south and high in the north,and a gradual increase from the shore to the sea;Principal component analysis results display,sources of pollution include the input of terrestrial pollution(nutrient salts,Cd,As),the marine aquaculture pollution(nutrient salts,Cu),port pollution(Oil,Zn,Pb,Hg).展开更多
文摘The distribution characteristics of heavy metals such as Cu, Zn, Pb, Cd, Hg. As in seawater, superficail sediments and several marine organisms of Dongzhai Harbor in Hainan were analyzed. Index methods of the single factor and geo-accumulation were used to assess the pollution degree of heavy metals. The results showed that the heavy metal levels in the seawater of Dongzhai Harbor accorded with the first category of the seawater except Pb, and were much lower than the fishery water quality standard; the concentration of the heavy metal in surface sediments did not exceed the national benchmark of the first-class of marine sediment quality basically, and the superficial sediments were essentially uncontaminated; the heavy metal content in wetland sediments was slightly higher than those in other typical mangrove wetland island of Hainan and marine sediments in Dongzhai Haibor, which indicated this area might has been affected by land-based pollution influence, and this should cause the attention of related departments; the heavy metal concentrations in marine organisms were up to the first category. All were not beyond the standard of non-environmental pollution aquatic products.
基金Supported in part by the Australian Research Council (Small Grant Scheme) and a Royal Thai Government Scholarship.
文摘Heavy metal pollution from industrial wastewater is a worldwide environmental issue. Biosorption of heavy metals by using biosorbents derived from various types of biomass has been shown to be effective for the uptake of heavy metal ions. In this study, biosorbents derived from the biomass of a group of marine macroalgae were used for the removal and recovery of heavy metal ions from aqueous solutions. Results indicated that the biosorbents have high uptake capacities and affinities for a number of heavy metal ions. The uptake capacities of the biosorbents were in the range of 1.0 to 1.5mmol·g-1 for divalent heavy metal ions. The kinetics of the uptake process was fast and the process can be used in both batch and fixed-bed operations. It appears that the biosorption process by using biosorbents from marine macroalgae can be an efficient and cost effective technology for the treatment of heavy metal containing wastewater.
文摘The paper presents the results of a comprehensive monitoring of the polygon： ＂Odessa Region, north-western part of the Black Sea＂ for the period 2009-2011. It is shown that most of the copper and nickel is brought into the sea from the catchment area, and zinc and cadmium are mainly of the autochthonous origin. It is found that in 2010, after heavy rains, the area of bottom sediments contaminated by copper and nickel was increased. The main source of copper in the sea is vast vineyards.
文摘According to 12 kinds of water quality elements(salt,COD,DO,PO_(4)^(3)--P,inorganic nitrogen,Oil,Cu,Pb,Zn,Cd,Hg,As)in 20 sampling stations in Dafeng sea area.The single factor index method was used to evaluate the water pollution level,the clustering method was used to identify the pollution area,and the source of pollution was analyzed by principal component analysis.The results show:the water quality environment in Dafeng Sea is generally good,and inorganic nitrogen and phosphate are the main over-standard factors.;The spatial cluster analysis shows that the distribution of water quality pollution in Dafeng sea area is low in the south and high in the north,and a gradual increase from the shore to the sea;Principal component analysis results display,sources of pollution include the input of terrestrial pollution(nutrient salts,Cd,As),the marine aquaculture pollution(nutrient salts,Cu),port pollution(Oil,Zn,Pb,Hg).
