Distribution of Trace Metals in Channel Sediment: a Case Study in South Atlantic Coast of Spain     

Md. Khurshid Alam Bhuiyan  Sabrina Qureshi  Md. Masum Billah  Suresh Varma Kammella  Md. Rushna Alam  Sunuram Ray  Md. Mostafa Monwar  Abu Hena M. K. 《Water, air, and soil pollution》2018,229(1):14

Recently, Sancti Petri channel on the southwestern (SW) part of Iberian Peninsula has been experiencing urban, industrial, and vehicular expansion. Until recently, there have been only few published reports documenting the pattern of metal accumulation in this estuarine sediment. In the present study, trace metals such as Cu, Zn, Ni, Mn, Pb, Co, Cd, As, and Hg concentrations were analyzed from 69 sediment samples collected from 23 sampling sites of the Santi Petri channel. The magnitude of trace metal accumulation found as the following trend: Mn > Zn > Cu > Pb > Ni > Co > As > Cd > Hg. Spatial distribution pattern demonstrated overall decreasing trend of trace metal from Cadiz Bay mouth to the open ocean mouth, clearly correlative to the presence of anthropogenic inputs. Results of the principle component analysis (PCA) revealed that sediment metal chemistry of Sancti Petri channel is mainly regulated by the concentrations of Pb, Cu, Zn, and Ni; possible sources of those were from vehicular-related emissions. Pollution load index (PLI) and geo-accumulation index (I _geo ) indicated overall low values. The study will stimulate improvement of our understanding regarding the pattern of accumulation of metals in the coastal sediments, and the recorded values of metals in the present study can be used as suitable reference for future studies.  相似文献   

Surfactants in the Sea Surface Microlayer,Underlying Water and Atmospheric Particles of Tropical Coastal Ecosystems     

Royston Uning  Mohd Talib Latif  Kai Ling Yu  Sze Yin Cheng  Fatimah Ahamad  Md Firoz Khan  Edmand Andrew Bedurus  Suhaimi Suratman 《Water, air, and soil pollution》2018,229(9):305

This study aims to determine the composition of surfactants in the sea surface microlayer (SML), underlying water (ULW) and atmospheric particles (AP). Surfactants were determined colorimetrically as methylene blue active substances (MBAS) and disulphine blue active substances (DBAS) for anionic and cationic surfactants, respectively. The concentration of dissolved inorganic nutrients (DIN) in ULW was determined so as to indicate the influence of ULW to the surfactants in SML. The results showed that the concentration of MBAS and DBAS in SML at both stations ranged between 0.05 and 0.31 μmol L^?1, and between 0.19 and 0.59 μmol L^?1, respectively. Surfactants in ULW influence the concentration of surfactants in SML (r?=?0.65, p?<?0.01, n?=?36). The station influenced by anthropogenic sources showed a higher concentration of surfactants in ULW, SML and AP. This finding suggests fine mode atmospheric particles (FMAP) are the main carrier for anionic surfactants as MBAS in the coastal ecosystem. Anionic surfactants as MBAS were found as better indicator of anthropogenic sources than cationic ones.  相似文献   

Genetic variation in cadmium tolerance is related to transport and antioxidant activities in field peas (Pisum sativum L.)     

Mohammad Farhadur Rahman  Monirul Islam  Most Champa Begum  Mohammad Firoz Alam 《Archives of Agronomy and Soil Science》2017,63(4):578-585

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Comparative performance of exotic and indigenous forest species for tropical semievergreen degraded forest land reforestation in Chittagong,Bangladesh     

K. R. Islam  M. Kamaluddin  M. K. Bhuiyan  Abu Badruddin 《Land Degradation \u0026amp; Development》1999,10(3):241-249

Exotic Acacia arabica, Acacia Auriculiformis, Eucalyptus camaldulensis, and Pinus caribaea, and indigenous Albizia lebbek, Cassia siamea, Chikrassia Tabularis, and Derris robusta were reforested in tropical semievergreen degraded forest lands to evaluate their capability of survival, growth, and biomass production in energy plantations. Three years after reforestation, significant variations in growth and biomass yield production were observed within each category of forest species. Both exotic and indigenous forest species had shown similar capability in the biomass production. Plant height was found a better predictor of biomass production than diameter at breast height. There have been improvements in soil properties under reforestation. Among the forest species, indigenous Cassia siamea and Derris robusta, and exotic Acacia auriculiformis were found highly adaptable, fast-growing, productive, and site improving, suitable for reforestation of degraded lands. Copyright © 1999 John Wiley & Sons, Ltd.  相似文献