Copper, zinc, and lead fractions in soils long-term irrigated with municipal wastewater
Cezary Kabała , Anna Karczewska , Katarzyna Szopka , Jarosław Wilk
AbstractLong-term irrigation with municipal wastewater may lead, even in spite of intense farming, to an accumulation of organic matter, nutrient elements, and trace metals in soils. Excessive increases of heavy metals may pose a potential risk to the food chain and provoke restrictions for the further cultivation of sensitive crops. Copper (Cu), zinc (Zn), and lead (Pb) forms in soils under long-term irrigation (for 100-120 years) with treated wastewater of Wroclaw were investigated by using selective seven-step sequential extraction (procedure of Zeien-Bruemmer) for partitioning the metals into operationally defined fractions, likely to be released in solution under various environmental conditions. The largest fraction of Cu, Pb, and particularly Zn in nonirrigated (control) soils was strongly bound in a residual form, while the percentage of exchangeable and the most labile fractions were negligible. Total concentration of metals in irrigated soils was elevated, and significant redistribution of metals among phases was observed. Percentages of residual fraction of Cu and Pb were no more than 25% (Zn < 40%), while significantly increased contribution of fractions occluded on iron (Fe) oxides and organically bound Cu. Exchangeable and readily mobile forms of Zn are predominant zinc fractions in soils irrigated with wastewater.
|Journal series||Communications in Soil Science and Plant Analysis, ISSN 0010-3624, e-ISSN 1532-2416, (A 15 pkt)|
|Publication size in sheets||0.7|
|Keywords in English||Mobility; Sequential extraction; Trace elements|
|Publication indicators||= 19; = 17; : 2011 = 0.654; : 2011 = 0.506 (2) - 2011=0.642 (5)|
|Citation count*||25 (2020-08-14)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.