کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4409567 1307490 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Carbon mineralization, microbial activity and metal dynamics in tailing ponds amended with pig slurry and marble waste
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Carbon mineralization, microbial activity and metal dynamics in tailing ponds amended with pig slurry and marble waste
چکیده انگلیسی

A field experiment was set up in Cartagena-La Unión Mining District, SE Spain, aimed at evaluating the short-term effects of pig slurry (PS) amendment alone and together with marble waste (MW) on organic matter mineralization, microbial activity and stabilization of heavy metals in two tailing ponds. These structures pose environmental risk owing to high metals contents, low organic matter and nutrients, and null vegetation. Carbon mineralization, exchangeable metals and microbiological properties were monitored during 67 d. The application of amendments led to a rapid decrease of exchangeable metals concentrations, except for Cu, with decreases up to 98%, 75% and 97% for Cd, Pb and Zn, respectively. The combined addition of MW + PS was the treatment with greater reduction in metals concentrations. The addition of PS caused a significant increase in respiration rates, although in MW + PS plots respiration was lower than in PS plots. The mineralized C from the pig slurry was low, approximately 25–30% and 4–12% for PS and MW + PS treatments, respectively. Soluble carbon (Csol), microbial biomass carbon (MBC) and β-galactosidase and β-glucosidase activities increased after the application of the organic amendment. However, after 3 d these parameters started a decreasing trend reaching similar values than control from approximately day 25 for Csol and MBC. The PS treatment promoted highest values in enzyme activities, which remained high upon time. Arylesterase activity increased in the MW + PS treatment. Thus, the remediation techniques used improved soil microbiological status and reduced metal availability. The combined application of PS + MW reduced the degradability of the organic compounds.


► Pig slurry and marble waste led to a rapid decrease of exchangeable Cd, Pb and Zn.
► Respiration rates were affected by heavy metals, carbonates and texture.
► The application of marble reduced the degradability of the organic amendment.
► Enzyme activities increased after the application of the organic amendment.
► Arylesterase maintained high activity in pig slurry + marble waste treatment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 90, Issue 10, March 2013, Pages 2606–2613
نویسندگان
, , , , , ,