Heavy Metal Removers
SENDACHEM Heavy Metal Removers are high-performance organic chelating agents designed to bind selectively with heavy metal ions Cu2+, Pb2+, Hg2+, Cd2+, Cr6+, Ni2+, As3+ and etc. in complex industrial wastewater. They form highly stable, insoluble coordination complexes, allowing efficient heavy metal precipitation and removal down to parts-per-billion (ppb) levels to ensure strict regulatory compliance.
Engineered for demanding industrial wastewater applications, SENDACHEM solutions deliver powerful and reliable heavy metal removal under challenging conditions. Advanced chelation technology enables rapid metal capture and stable precipitation, improving treatment efficiency while minimizing residual metals and re-contamination risks.
SENDACHEM's Organic Chelating Technology solves these challenges through advanced macromolecular chelation chemistry:
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Multi-Dentate Ligand Binding: Our organic polymers contain active sulfur- and nitrogen-based functional groups (such as dithiocarbamate derivatives) that act as multi-dentate ligands.
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Stable Coordination Complexes: These ligands donate electron pairs to transition metal ions, forming exceptionally stable, ring-structured coordination complexes (chelates).
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Rapid Flocculation & Sedimentation: Due to the high molecular weight of the polymer chain, the micro-flocs rapidly aggregate into large, dense, easily filterable flocs.
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Resilience to Complexing Agents: Unlike simple hydroxides, SENDACHEM's chelators easily break apart existing metal complexes (such as those formed by EDTA, tartrates, or ammonia) to capture target metal ions.
1）CHR-1500
CHR-1500 is a cost-effective chelating solution designed for general-purpose industrial wastewater treatment. It delivers reliable performance in moderate TDS water systems, making it an ideal choice for standard industrial wastewater and municipal mixing applications where balanced treatment performance and operating cost are key considerations.
2）CHR-3000
CHR-3000 is a low-cost chelating solution developed for non-sensitive, high-volume applications. With reliable treatment performance and economical operation, it is particularly suitable for mining and smelting tailwater, as well as bulk primary treatment processes where large wastewater volumes need to be treated efficiently.
3）CHR-5500
CHR-5500 is SENDACHEM's high-performance solution for demanding wastewater treatment applications. Featuring superior chelation kinetics and excellent overall performance, it is designed for ultra-low discharge limits and high-concentration wastewater, with applications including semiconductor manufacturing, electroplating, battery recycling, and PCB wastewater treatment.
SENDACHEM Heavy Metal Removers are widely deployed across high-stakes industries where environmental compliance and operational reliability are critical:
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Electroplating & Metal Finishing: Removes nickel, copper, zinc, and chrome from rinse waters, even in the presence of strong complexing agents (EDTA, citric acid).
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Semiconductor & Electronics Manufacturing: Handles complex wastewater streams containing copper and nickel from CMP (Chemical Mechanical Planarization) and plating lines.
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Battery Recycling & Manufacturing: Captures lead, nickel, cobalt, and cadmium from acid-rich spent battery wash and reclamation processes.
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Mining & Smelting: Mitigates heavy metal run-off and tailwater pollution, treating massive volumes of water containing arsenic, lead, and cadmium economically.
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PCB (Printed Circuit Board) Production: Precipitates EDTA-copper complexes and ammoniacal copper fractions effectively.
Q1: Can SENDACHEM heavy metal removers treat chelated or complexed copper in PCB wastewater?
Yes. SENDACHEM CHR-5500 is specifically formulated with a higher stability constant than common organic complexing agents (like EDTA, ammonia, and tartrate). It out-competes these chelators, breaking the copper-complex bond and successfully precipitating the copper down to <0.1mg/L.
Q2: What is the optimal pH range for these heavy metal removers?
Unlike traditional hydroxide precipitation which requires a very narrow and high pH range (often pH 9.0 - 11.0), SENDACHEM organic chelating agents operate effectively over a broad pH window, typically pH 3.0 - 12.0. This reduces the amount of acid or alkali required for neutralization, cutting overall chemical costs.
Q3: Does using these chelators increase the volume of hazardous sludge?
No. Because SENDACHEM products have high selectivity for heavy metals and ignore background calcium and magnesium, they do not produce massive hydroxide-calcium sludge. The sludge generated is dense, compact, and easily dewatered, significantly reducing sludge hauling and landfill disposal costs.
Q4: How is the product dosed in a typical wastewater treatment system?
The liquid formulation is dosed directly into the reaction tank or coagulation tank using a standard metering pump. It is typically followed by a coagulant (e.g., PAC) and a flocculant (PAM) to accelerate gravity sedimentation or dissolved air flotation (DAF).
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